Technical Specification for 11kv Packaged substation (with 990/630/400KVA oil / dry type transformers)
Specification no –BSES-SP-EPSX-01-R2
Prepared by:
Reviewed by
Approved by:
Tarun
D Sharma
D Sharma
Rev
R2
Date
2/1/2010
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SP-EPSX-01-R2 Index 1.0
Scope of supply..............................................................................................................3
2.0
Applicable codes & standards ........................................................................................3
3.0
Purchaser electrical system data ...................................................................................4
4.0
11kv packaged substation configuration & enclosure ....................................................4
5.0
11kv Ring Main Unit (RMU)............................................................................................4
6.0
11kv XLPE Cable & termination kit ................................................................................9
7.0
Distribution oil transformer (990KVA / 630 KVA / 400KVA Sealed type) .....................10
8.0
Dry Type Distribution Transformer (400 / 630 / 1000 KVA)..........................................17
9.0
Low voltage Bus bar system ........................................................................................26
10.0
Low voltage switchgear, ACB & MCCB........................................................................26
11.0
Automatic Power Factor Correction system .................................................................27
12.0
Energy metering - LT....................................................................................................29
13.0
Enclosure for packaged substation ..............................................................................30
14.0
Earthing & Illumination .................................................................................................31
15.0
Labels & painting.........................................................................................................32
16.0
Approved make list of major equipments. ....................................................................32
17.0
Quality assurance by Vendor .......................................................................................33
18.0
Inspection & testing ......................................................................................................33
19.0
Shipping, Handling and Site support ............................................................................33
20.0
Deviations.....................................................................................................................34
Annexure - A
Scope of supply ............................................................................................35
Annexure - B
Technical particulars (Data by purchaser) ....................................................37
Annexure - C
Guaranteed Technical Particulars (Data by Supplier) ..................................38
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SP-EPSX-01-R2 Technical specification for 11kv Packaged Substation
1.0 Scope of supply For scope of supply, refer annexure A & for minimum bill of material refer Annexure E 2.0 Applicable codes & standards Materials, equipment and methods used in the manufacture of 11kv Packaged substation shall conform to the latest edition of all applicable parts of following codes & standards including amendments –
IEC 62271-202 IEC 60044 IEC 60225 IEC 60625 IEC 60502 IEC 60947-2 IS 2026 IS 11171 IS 6600 IS 13947 IS 2099 IS 3156 IS 2705 IS 1554 IS 7098 IS 2629 IS 4759 IS 13585 IS 13340 IS 3043 IS 335 IS 8130 IS 5
Indian electricity act & Indian Electricity Rules CBIP manual on transformers Power transformers Specification for high voltage switchgear Low voltage switchgear & control gear assemblies Degree of enclosures provided by enclosures Insulation coordination for low voltage systems Degree of protection provided by enclosure against mechanical shocks High voltage switchgear & control gear - prefabricated substation Instrument transformers - Current & voltage transformers Electrical relays High voltage switches Power cables Low-voltage switchgear and control gear : Circuit-breakers Power transformers Dry type transformers Loading of power transformers Low voltage switchgear & control gear Bushings for voltages above 1000v Voltage transformers Current transformers PVC cables XLPE cables Recommended Practice for Hot-Dip Galvanizing of Iron and Steel Hot-dip zinc coatings on structural steel and other allied products Shunt capacitors Shunt capacitors Code of practice for Earthing Insulating oils Conductors for insulated cables Ready mixed paints
IS:13703
HRC Fuse
IEC 60076 IEC 60694 IEC 60439-1 IEC 60529 IEC 60664-1 IEC 62262
In the event of direct conflict between various order documents, the precedence of authority of documents shall be as follows i.
Guaranteed Technical Particulars (GTP)
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SP-EPSX-01-R2 ii.
Specification including applicable codes, standards
iii.
Approved Vendor Drawings
iv.
Other documents 3.0 Purchaser electrical system data
3.1.0 3.1.1 3.1.2 3.1.3
HT supply system Rated voltage Rated frequency Fault level
3 phase AC, 3 wire 11kv +/-10% 50 Hz ± 5% 350MVA – 18.5kA
3.2.0 3.2.1 3.2.2 3.2.3
LT supply system Rated voltage Rated frequency Fault level
3 phase AC, 4 wire 415v +/-10% 50 Hz ± 5% 35MVA – 50kA
4.0 11kv packaged substation configuration & enclosure The packaged substation shall have all the following major components in addition to the other items required for satisfactory performance of equipment – 4.1 Metallic painted enclosure with steel base frame for overall package 4.2 11kv Ring main unit 3 way (2 no Load break switches + 1 no circuit breaker) 4.3 11kv XLPE armored Aluminum cable with termination kit 4.4 990KVA / 630 KVA / 400KVA, 11kv/0.433volt, Dyn11 oil type sealed / dry type transformer with all accessories 4.5 Low voltage bus bar system with epoxy insulators 4.6 Low voltage 2000Amp / 1250A / 800A ACB for incoming with 7 / 5 nos. 400A MCCB for outgoing feeder. 4.7 300kVAR / 200KVAR APFC system with control relay & 630A / 400A Amp incomer MCCB. 4.8 Energy meter box at transformer LT side including CTs 1600 / 5 amp 4.9 Supply of RTU with 48/24V battery set in LT compartment for automation. Refer specification of Automation. 4.10 Substation internal cabling, lighting & earthing system along with required hardware, gaskets, gland plates etc
5.0 11kv Ring Main Unit (RMU) The equipment shall have all the following features – 5.1.0 5.1.1
RMU Configuration RMU Configuration
5.1.2
Extensibility
Two Load break switches (LBS) + one transformer circuit breaker (TCB). Both LBS shall be electrically operated. Non extensible type
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SP-EPSX-01-R2 5.1.3 5.1.4.1 5.1.4.2 5.1.5
5.1.6 5.2.0 5.2.1
5.2.2 5.2.3 5.2.4 5.2.5 5.2.6
5.2.7 5.2.8.1 5.2.8.2
5.2.9 5.2.10 5.2.11 5.2.12
5.2.13.1
5.2.13.2 5.2.13.3 5.2.14
5.2.14.1
Load break switch, Circuit breaker All shall be non draw out type, fixed & earth switch in RMU panel position Insulation medium for panel SF6 gas or Dry air in sealed metallic tank breakers & load break switches SF6 gas or Vacuum type (with dis connector & earth switch) Arc interruption chamber for Arc interruption chamber of breakers breaker shall be separate from the main insulated tank. (Desirable feature) Maximum dimensions for a 3 way 1250 W x 800 D x 2000 H panel (1 CB + 2 LBS) RMU panel construction RMU Panel type Metal enclosed, framed, Compartmentalized panel construction Service location Indoor, non air conditioned environment Mounting Free Standing Overall enclosure protection IP4X minimum, vermin proof Doors Front access with anti theft hinge Covers Bolted for rear access, with handles All the accessible bolts / screws Special tools per RMU (if any) shall be shall be vandal proof. One set of in the scope of supply. required Construction Sheet metal 2.5mm thick CRCA Base frame made of steel for RMU Raised frame of 300 mm height Foundation bolts + Fixing bolt for Cable box compartment should be RMU & frame (in case the frame is extended up-to base-frame bottom to have metallic separation between supplied loose) each of the feeders at base frame level too. Painting should match with RMU shade. Lifting lugs Four numbers Cable entry Bottom Gland plate 3mm metallic, removable type & split type in two parts, Cable type & size 3c x 120 or 300 sq mm 11000v grade Al conductor XLPE/ PILC with armor & PVC outer sheath Terminals for 11kv cable with right angled boots, set of required termination size of Brass Nut bolt & Bimetallic washers. Termination type suitable for heat shrinkable type Termination height from gland plate 700mm minimum Bus bar Tinned copper with sleeve (Sizing Calculation to be submitted in support of its Guaranteed S.C. rating / Capability) Bus bar continuous rated current 630 Amp (at designed 40 deg.C ambient)
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SP-EPSX-01-R2 5.2.14.2 Bus bar short time withstand capacity 5.2.14.3 Bus bar support insulator material 5.2.14.4 Maximum temperature rise above reference ambient 40 deg C 5.2.15.0 Earth bus bar
18.5 KA for 3 sec SMC / DMC resin In line with Table 3 of IEC694
Aluminum / Copper sized for rated fault duty for 3 sec 5.2.15.1 Earth bus internal connection to all By 2.5 sq mm copper flexible wire, non current carrying metal parts Earth connection point maximum 1 meter away from cable test facility 5.2.15.2 Earth bus external connection to Studs on both sides with holes for owners earth M10 bolt + hardware to readily receive purchaser earth connection 5.2.16 Cooling arrangement By natural air without fan 5.2.17 Panel internal wiring Stranded flexible color coded PVC insulated copper wire 2.5 sq mm, 1100 volt grade (AC- black, DC – grey, Earth – green) 5.2.18 Hardware (Nut, bolts & handle) Stainless steel (Except termination nut-bolts which are Brass / Tinned Copper) 5.2.19 Gasket Neoprene rubber 5.2.20 Marshalling terminal blocks 2.5 Sq mm, Nylon 66 material, screw type + 20% spare in each row of TB. 5.2.21 Panel cover fixing bolts Allen head 6mm with hexagonal slot 5.2.22 Padlock facility Required for all earth switches & all handles 5.2.24 Explosion vents To ensure operator’s safety, design should ensure that gases / flames generated during flash over / blast in any of the compartment, must not come out from the front of RMU. Internal arc test report (for Cable compartment & other compartments) must be submitted to support above along with RMU GA drawing indicating these vents. 5.3.0 Load break switch (Isolator) 5.3.1 Type Three poles operated simultaneously by a common shaft 5.3.2 Arc interruption in dielectric medium SF6 or vacuum 5.3.3.1 Operating mechanism for close / Electrically operated with motor open mechanism. 5.3.3.2 Addition / removal of motor Without overhaul of operating mechanism 5.3.3.3 Manual operation Possible without removal of motor 5.3.3.4 RMU without motor complete with power & control wiring so that only motor can be added at later date 5.3.4.1 Motor rated voltage 24v DC / 48v DC 5.3.5 Continuous rating of LBS at design 630 Amp ambient 5.3.6 Short time withstand capacity 18.5 KA for 3 sec 5.3.7 Fault making capacity 46.3 KA peak ___________________________________________________________________________________________ Page 6 of 54
SP-EPSX-01-R2 5.3.8
5.3.9
5.3.10 5.4.0 5.4.1 5.4.2 5.4.3 5.4.4 5.4.5.1 5.4.5.2 5.4.6
5.4.7 5.4.8 5.4.9
5.4.10 5.4.11
5.4.12 5.4.13
5.4.14 5.4.15
5.5.0 5.5.1 5.5.2 5.5.3 5.5.4 5.5.5
Minimum number of operations at To be guaranteed by manufacturer, rated current (as per IEC 60265) test certificate from authorized test laboratory to be submitted Minimum number of operations at Same as above rated fault current (as per IEC 60265) Fault passage indicator (FPI) To be provided on right hand side of one LBS for panel type 1CB + 2 LBS Transformer circuit breaker - TCB Circuit breaker Type Three pole, operated simultaneously by a common shaft Arc interruption in dielectric medium SF6 gas or Vacuum Operating mechanism - TCB Manual spring charged stored energy type Emergency trip / open push button On panel front Continuous rating 630 Amp at ambient design 40deg C Short time withstand capacity 18.5 KA for 3 sec Minimum number of operations at To be guaranteed by manufacturer, rated current (as per IEC 62271) test certificate from authorized test laboratory to be submitted Fault making capacity 46.3 KA peak Fault breaking capacity 18.5 KA Minimum Minimum number of operations at To be guaranteed by manufacturer, rated Fault current (as per IEC test certificate from authorized test laboratory to be submitted 62271) Breaker status auxiliary contact 2NO + 2NC wired to terminal block Current transformer ratio 80-150 / 1 amp Considering three core cable terminations, mounting flexibility must be there for CT’s (in horizontal & vertical direction both). Additionally, some CAUTION marking (by sticker/ paint) should be there to avoid CT’s installation above the screen of cable (i.e. earth potential point.) CT accuracy class 10P10 minimum Protection relay Self powered, Microprocessor based Numerical relay (LCD display is desirable), IDMT over current / earth fault protection with high set element, manual reset type Relay aux contacts for remote Potential free, 1NO+1NC wired to indication TB Shunt trip 230v AC (for WTI trip & To be wired to terminal blocks door limit switch of enclosure or transformer) Earth switch Type for each Load break switch. Three Pole, operated simultaneously by a common shaft Switching in dielectric medium Dry Air in sealed medium or SF6 gas Operating mechanism for close & Manual open Fault making capacity 50 kA (Desirable) Auxiliary contacts 1NO+1NC wired to terminal block
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SP-EPSX-01-R2 5.5.6
5.6.0 5.6.1 5.6.2 5.6.3
5.6.4 5.6.5 5.6.6 5.7.0 5.7.1.1 5.7.1.2 5.7.1.3 5.7.2
5.7.3
5.7.4
5.8.0 5.8.1
5.8.2
5.8.3 5.8.4 5.8.5 5.8.6 5.8.7 5.8.8 5.8.9 5.8.9.1 5.8.9.2
Disconnect switch (if provided in Desirable to be located on purchaser series with vacuum bottle) cable connection side of vacuum bottle Requirements of sealed housing live parts (RMU SF6 gas chamber) Enclosure Stainless steel enclosure, IP67 class SF6 gas pressure low alarm To be given Provision for SF6 gas filling To be given (For ‘sealed for life’ design of RMU, this is not applicable) Provision for SF6 gas pressure Manometer with non return valve indication Arc interruption method for SF6 Puffer type / rotating arc type breaker / Load break switch Potential free contacts for SF6 gas 1NO +1NC (Desirable) pressure low RMU operation interlocks Interlock type Mechanical Load break switch & respective earth Only one in ‘close’ condition at a switch time Circuit breaker & respective earth Only one in ‘close’ condition at a switch time Prevent the removal of respective Electrical / Mechanical cable covers if load break switch or circuit breaker is ‘ON’ Prevent the closure of load break Electrical / Mechanical switch or circuit breaker if respective cable cover is open Cable test plug for LBS/CB Mechanical accessible only if Earth switch connected to earth For SCADA & Local Indications & signals Operation counter on front / Inside To be provided for each LBS & the RMU LT chamber Circuit breaker, with minimum four digits & non- re-settable type Cable charge status indication for all capacitor type voltage indicators with LBS & CB LED on all the phases (Shall be clearly visible in day light) Spring charge status indication On front for breaker Earth switch closed indication (For On front Each LBS) Load break switch ON/OFF Green for OFF / Red for ON indication Circuit breaker On/OFF indication Green for OFF / Red for ON Circuit breaker protection relay Flag operated on fault Fault passage indication on LBS Flag Status signals to SCADA - to be 2NO + 2NC wired to marshalling terminal block LBS close / open potential free contacts LBS & CB Earth Switch close /open potential free contacts
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SP-EPSX-01-R2 5.8.9.3 5.8.9.4 5.8.9.5 5.8.9.6 5.8.9.7 5.8.10.1
Battery charger Fail CB close / open Protection relay operated FPI operated SF6 gas pressure low Commands from SCADA - to be wired to marshalling terminal block
potential free contacts potential free contacts potential free contacts potential free contacts potential free contacts) LBS close / open. Other details please see automation philosophy. 5.8.10.2 FPI Reset On panel front with description of 5.9.0 Mimic diagram, labels & finish function & direction of operation of handles/buttons 5.9.1 Mimic diagram (Shall not be preferred with Stickers) Operating instruction chart and Do’s & Don’ts in Hindi / local language to be displayed on left / front side of panel enclosure on Al Sheet, duly affixed on panel. 5.9.2 Name plate on panel front Fixing by rivet only 5.9.2..1 Material Anodized aluminum 16SWG / SS 5.9.2.2 Background SATIN SILVER 5.9.2.3 Letters, diagram & border Black 5.9.2.4 Process Etching 5.9.2.5 Name plate details Month & year of manufacture, equipment type, input & output rating, purchaser name & order number, guarantee period 5.9.3 Labels for meters & indications Anodized aluminum with white character on black background OR 3 ply lamicoid 5.9.4 Danger plate on front & rear side Anodized aluminum with white letters on red background 5.9.5 Painting surface preparation Shot blasting or chemical 7 tank process 5.9.6 Painting external finish Powder coated epoxy polyester base grade A, shade - RAL 7032, uniform thickness 80 micron minimum 5.9.7 Painting internal finish Powder coated epoxy polyester base grade A, shade - white, uniform thickness 80 micron minimum 6.0 11kv XLPE Cable & termination kit The 11kv XLPE cable connection from RMU to distribution transformer shall be conforming to IS 7098 and shall have all the following features 6.1 6.2 6.3 6.4
Cable type & size
XLPE insulated armored cable 3c150sqmm Aluminum conductor Cable voltage grade 11kv XLPE insulation thickness 3.14 mm minimum Aluminum conductor no of strands As per Table 2 of IS 8130
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SP-EPSX-01-R2 6.5 6.6 6.7 6.8
Insulation screen
With semi conducting extrusion, copper tape & water swellable tape Type of armor GI flat as per table 4 of 7098 part 2 11kv cable termination at RMU & By 11kv grade termination kit, heat Distribution transformer shrink type Cable support from RMU to GI cable tray 300mm wide transformer HT side cable box
7.0 Distribution oil transformer (990KVA / 630 KVA / 400KVA Sealed type) The distribution transformer shall be designed to comply with following features – 7.1.0 Major Design criteria 7.1.1.1 Voltage variation on supply side + / - 10 % 7.1.1.2 Frequency variation on supply side +/ - 5 % 7.1.1.3 Combined variation of voltage and - 20 % or + 10 % frequency 7.1.1.4 Service Condition Refer Annexure B 7.1.1.5 Insulation level One minute power frequency 3kv for 415v system & withstand voltage 28kv for 11kv system Lightning impulse withstand voltage 75kv peak for 11kv system 7.1.1.6 Short Circuit withstand level Three phase dead short circuit at For 3 sec for 990KVA / 630 KVA / secondary terminal with rated 400KVA transformer with 5 % voltage maintained on the other side impedance 7.1.1.7 Overload capability As per IS 6600 7.1.1.8 Noise level Shall not exceed limits as per NEMA TR-1 with all accessories running measured as per IEC 551 / NEMA standard 7.1.1.9 Radio Influence Voltage Maximum 250 microvolt 7.1.1.10 Harmonic currents Transformer to be designed for suppression of 3rd, 5th, 7th harmonic voltages and high frequency disturbances. 7.1.1.11 Partial Discharges Transformer to be free from partial discharge up to 120 % of rated voltage as the voltage is reduced from 150 % of rated voltage i.e. there shall be no significant rise above background level 7.1.2 Major Parameters 7.1.2.1 Rating 990KVA / 630 KVA / 400 KVA 7.1.2.2 Voltage Ratio 11kv / 433 volts 7.1.2.3 Vector Group Dyn11 7.1.2.4 Impedance at 75 deg C 5%, tolerance as per IS 7.1.2.5 Losses at 75 deg C With ONAN cooling 7.1.2.5.1 No load Loss a) For 400 KVA 0.7 Kw max ___________________________________________________________________________________________ Page 10 of 54
SP-EPSX-01-R2
7.2.0
b) For 630 KVA 1.0 Kw Max. c) For 990 KVA 1.4 Kw Max. Load losses at principal tap a) For 400 KVA 5.1 Kw max b) For 630 KVA 6.8 Kw max. c) For 990 KVA 10.8 Kw Max. Temperature Rise top oil – without 30 Deg C max over ambient 40 enclosure Deg C Temperature Rise winding – without 40 Deg C max over ambient 40 enclosure Deg C Flux density 1.7 Tesla at 100% rated voltage 1.9 Tesla at 110% rated voltage Current density 3 amp / sqmm for HV & LV winding Tapping on HV winding Off circuit +/- 5% in 2.5% step Design Clearances Phase - phase Phase - earth 11kv system 180mm 120mm 415v system 25mm 25mm Transformer construction
7.2.1
Type
7.2.2.1 7.2.2.1.1 7.2.2.1.2 7.2.2.1.3
Tank Type Material of Construction Plate Thickness
7.2.2.1.4
Welding features i) All seams and joints shall be double welded ii) All welding shall be stress relieved for sheet thickness greater than 35 mm iii) All pipes, stiffeners, welded to the tank shall be welded externally iv) All corrugated fins or expansion bellows provided shall be double welded. Tank features i) Bottom with stiffeners & adequate space for collection of sediments ii) No external pocket in which water can lodge iii) Tank bottom with welded skid base i) Strength to prevent permanent deformation during lifting, jacking, transportation with oil filled. v) Minimum disconnection of pipe work and accessories for cover lifting vi) Tank to be designed for oil filling under vacuum vii) tank cover fitted with lifting lug Inspection cover for bushing & Core As per manufacturer standard / Wind Fittings and accessories on main As per clause 7.3.0 tank Core
7.1.2.5.2
7.1.2.6 7.1.2.7 7.1.2.8 7.1.2.9 7.1.2.10 7.1.2.11
7.2.2.1.5
7.2.2.3 7.2.2.4 7.2.2.5
Double Copper wound, three phase, oil immersed, with ONAN cooling Type tested design Sealed type, Hermetic sealing Mild steel plate with low carbon To meet the requirements of pressure and vacuum type tests as per CBIP manual
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SP-EPSX-01-R2 7.2.2.5.1
Material
7.2.2.5.2
Grade
7.2.2.5.3
Core Design Features i) Magnetic circuit designed to avoid short circuit paths within core or to the earthed clamping structures ii) Magnetic circuit shall not produce flux components at right angles to the plane of lamination to avoid local heating iii) Least possible air gap and rigid clamping for minimum core loss and noise generation iv) Adequately braced to withstand bolted faults on secondary terminals without mechanical damage and damage/ displacement during transportation and positioning v) Percentage harmonic potential with the maximum flux density under any condition limited to avoid capacitor overloading in the system vi) All steel sections used for supporting the core shall be thoroughly sand blasted after cutting , drilling, welding vii) Provision of lifting lugs for core coil assembly viii) Supporting framework designed not to obstruct complete drainage of oil from transformer Winding Material Electrolytic Copper Maximum Current Density allowed Maximum 3 amp / sqmm Winding Insulating material Class A, non catalytic, inert to transformer oil, free from compounds liable to ooze out, shrink or collapse. Super enamel insulation is not accepted. Winding Insulation Uniform Design features i) Stacks of winding to receive adequate shrinkage treatment ii) Connections braced to withstand shock during transport, switching, short circuit, or other transients. iii) Minimum out of balance force in the winding at all voltage ratios. iv) Conductor width on edge exceeding six times its thickness v) Transposed at sufficient intervals vi) Coil assembly shall be suitably supported between adjacent sections by insulating spacers + barriers vii) Winding leads rigidly supported , using guide tubes if practicable viii) Winding structure & insulation not to obstruct free flow of oil through ducts Transformer Oil as per IS 335 and purchaser’s specification. Class 1 new mineral insulating oil, shall be certified not to contain PCBs. Naphthalene base with anti oxidant inhibitor subject to Purchaser’s specification SP-EBOO-01-R0. Bushings and Terminations Type of HV side bushing Indoor, Epoxy Resin cast, 12kv
7.2.2.6 7.2.2.6.1 7.2.2.6.2 7.2.2.6.3
7.2.2.6.4 7.2.2.6.5
7.2.2.7.1
7.2.2.8 7.2.2.8.1
High grade , non ageing, low loss, high permeability, grain oriented, cold rolled silicon steel lamination Minimum M4, thickness not more than 0.27mm.
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SP-EPSX-01-R2
7.2.2.8.2
Type of LV side bushing
7.2.2.8.2. 1
Essential provision for LV side line bushing
7.2.2.8.2. 2
Essential provision for neutral bushing
7.2.2.8.3 7.2.2.8.4
Arcing Horns Support insulators inside HV cable box if provided Termination on HV side bushing
7.2.2.8.5 7.2.2.8.6 7.2.2.8.7 7.2.2.8.8 7.2.2.8.9
LV side
voltage class and creepage 25mm/kv Indoor, Epoxy resin cast, 1kv voltage class and creepage 25mm/kv It shall be complete with copper palm suitable for tinned copper busbar of size 100x12 mm In case of neutral bushing the stem and bus bar palm shall be integral without bolted, threaded, brazed joints. Bus bar size shall be 100x12 mm Not required Epoxy resin cast, 12kv rated voltage Cable connection through cable box with disconnecting link Bus bar connection 25mm/kv
Termination of LV side bushing Minimum creepage distance of all bushings and support insulators. Protected creepage distance At least 50 % of total creepage distance Continuous Current rating Minimum 20 % higher than the current corresponding to the minimum tap of the transformer Rated thermal short time current 26.3kA for 3 sec
7.2.2.8.1 0 7.2.2.8.1 1 7.2.2.8.1 2 7.2.2.8.1 3 7.2.2.9 7.2.2.9.1 7.2.2.9.2
Current Transformers Provision Mounting
7.2.2.9.3
Maintenance requirements
7.2.2.9.4 7.2.2.9.5 7.2.2.9.6
Accuracy Class & ISF Burden Type
7.2.2.9.7 7.2.2.10 7.2.2.10.
CT ratio Off Circuit tap Switch Range /Step
Atmospheric protection for clamp Hot dip galvanizing as per IS 2633 and fitting of iron and steel Bushing terminal lugs in oil and air Tinned copper Sealing washers /Gasket ring
Nitrile rubber/ Expanded TEFLON(PTFE) as applicable On all three phases on LV side On LV side bushings on all three phases with the help of fibre glass mounting plate affixed to main tank by nut bolt arrangement Replacement should be possible by removing fixing nut of mounting plate without disturbing LT bushing 0.5 / 10 15 VA Resin Cast Ring type suitable for outdoor use 1600/5 amp on HV winding + / - 5 % in steps of 2.5 %
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SP-EPSX-01-R2 1 7.2.2.10. 2 7.2.2.10. 3 7.2.2.10. 4
7.2.2.10. 5 7.2.2.10. 6
Type
Rotary type, 3 pole gang operated,
Operating Voltage
11kv
Rated Current for tap Switch a) For 400 KVA b) For 630 & 990 KVA Operating Handle Tap position indicator
7.2.2.11 7.2.3 7.2.3.1 7.2.3.2
Pressure Relief Device Hardware External Internal
7.2.4 7.2.4.1
Gasket For Transformer , surfaces interfacing with oil like inspection cover etc. For Cable boxes, Marshalling box, etc. Valves Material of construction Type
7.2.4.2 7.2.5 7.2.5.1 7.2.5.2
7.2.5.3 7.2.5.4
7.2.6
7.2.6.1
7.2.7
7.2.7.1
60 Amps 100 Amps External at suitable height to be operated from ground level. With direction changing facility, locking arrangement, caution plate metallic fixed by rivet. required Stainless Steel Cadmium plated except special hardware for frame parts and core assembly as per manufacturer’s design Nitrile rubber based / cork
Neoprene rubber
Brass / gun metal Both end flanged gate valve / butterfly valve depending on application Size As per manufacturer’s standard Essential provision Position indicator, locking rod, padlocking facility, valve guard, cover plate. Cable routing on Transformer Control cables for accessories on transformer tank shall be routed through perforated GI trays Specification of wires to be used PVC insulated multi-strand flexible inside marshalling box , OLTC drive copper wires of minimum 2.5 sq mm size, 1100 V grade as per mechanism latest edition of relevant IS Terminal Blocks to be used by the Nylon 66 material, minimum 4 sq vendor mm, screw type for control wiring and potential circuit. Essential provision for CT terminals Sliding link type disconnecting terminal block screw driver operated stud type with facility for CT terminal shorting material of
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SP-EPSX-01-R2
7.2.8
7.2.9 7.2.9.1
7.2.9.2 7.2.10 7.2.10.1 7.2.10.2
7.2.10.3
7.2.10.4
7.3.0 7.3.1 7.3.1.1 7.3.1.2 7.3.1.3 7.3.1.4 7.3.1.5
housing melamine/ Nylon66 Cable glands to be used by the Nickel plated brass double vendor compression weatherproof cable gland Cable lugs to be used by the vendor For power cables Long barrel medium duty Aluminum lug with knurling on inside surface For Control Cable Tinned copper pre insulated Pin, Ring, Fork type as applicable Painting of transformer, marshalling box for CT, cable boxes etc. Surface preparation By 7 tank pretreatment process or shot blasting method Finish on internal surfaces of the Bright Yellow heat resistant and oil transformer resistant paint two coats. Paint shall neither react nor dissolve in hot transformer insulating oil. Finish on inner surface of the CT White Poly urethane paint anti terminal box condensation type two coats , minimum dry film thickness 80 microns Finish on outer surface of the Battle ship Grey shade 632 Poly transformer, CT terminal box, frame urethane paint two coats , parts minimum dry film thickness 80 microns Fittings & accessories Rating and Diagram Plate Required Material Anodized aluminum 16SWG Background SATIN SILVER Letters, diagram & border Black Process Etching Rating and Diagram Plate details Following details shall be provided on rating and diagram plate as a minimum i) type/kind of transformer with winding material, ii) standard to which it is manufactured iii) manufacturer's name; iv) transformer serial number; v) month and year of manufacture vi) rated frequency in Hz vii) rated voltages in kV viii) number of phases ix) rated power in kVA x) type of cooling (ONAN) xi) rated currents in A xii) vector group connection symbol xiii) 1.2/50 s wave impulse voltage withstand level in kV xiv) power frequency withstand voltage in kV xv) impedance voltage at rated current and frequency in percentage at
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SP-EPSX-01-R2
7.3.2
7.3.3 7.3.4 7.3.5 7.3.6 7.3.7
7.3.8 7.3.9
7.3.10
7.3.11
7.3.12
7.3.13 7.3.14
principal, minimum and maximum tap xvi) load loss at rated current; xvii) no-load loss at rated voltage and frequency xviii) continuous ambient temperature at which ratings apply in deg C xix) top oil and winding temperature rise at rated load in deg C; xx) winding connection diagram with taps and table of tapping voltage, current and power xxi) transport weight of transformer xxii) weight of core and windings xxiii) total weight xxiv) volume of oil xxv) weight of oil xxvi) name of the purchaser xxvii) PO no and date xxviii) Guarantee period Terminal marking Plate for Bushing, Required anodized aluminum black lettering on satin silver background both inside cable boxes near termination and on cable box cover (all fixed by rivet) Company Monogram Plate fixed by Required rivet Lifting Lug to lift complete Required transformer with oil Lifting lug for top cover Required Lashing Lug Required Jacking Pad with Haulage hole to Required raise or lower complete transformer with oil Detachable Bidirectional flat roller Required Assembly Pockets for ordinary thermometer on Required tank cover with metallic identification plate fixed by rivet. Drain valve (gate valve) for the main As per manufacturer design tank with cork above ground by 150mm minimum with padlocking and valve guard with metallic identification plate fixed by rivet. Filter valve (gate valve) at top with As per manufacturer design padlocking and valve guard with metallic identification plate fixed by rivet. Air Release Plug on tank cover with As per manufacturer design metallic identification plate fixed by rivet. Oil level indicator As per manufacturer design Earthing pad on tank for transformer Required earthing complete with non ferrous
___________________________________________________________________________________________ Page 16 of 54
SP-EPSX-01-R2
7.3.15 7.3.16
7.3.17 7.3.18 7.3.19
7.3.20 7.4.1 7.4.2 7.4.3
nut bolt, washers, spring washers etc. with metallic identification plate fixed by rivet Rain hood for vertical gasket joints Earthing bridge by copper strip jumpers on all gasket joints at at least two points for electrical continuity Skid base welded type with haulage hole Core , Frame to tank Earthing Danger plate made of Anodized aluminum with white letters on red background on Transformer, cable boxes (all fixed by rivet) Caution plate for Off Circuit tap changer fixed by rivet. Pressure relief valve make CT make Bushings make
Desirable Required
Required Required Required
Required Sukrut Pragati Baroda bushing / BSES approved make.
8.0 Dry Type Distribution Transformer (400 / 630 / 1000 KVA) For dry type distribution transformer following design shall be complied. 8.1
Major Design criteria
8.1.1
Voltage variation on supply side
+ / - 10 %
8.1.2
Frequency variation on supply side
+/ - 5 %
8.1.3
Transient condition
- 20 % or + 10 % combined variation of voltage and frequency
8.1.4
Service Condition
Refer Annexure B, the transformer is to be designed for PSS service condition as specified, but its full rating shall be available if located indoor in poorly ventilated atmosphere
8.1.5
Insulation level
8.1.5.1
One minute power withstand voltage Lightning impulse voltage
8.1.5.2
frequency 3kv for 415v system & 28kv for 11kv system withstand 75kv peak for 11kv system
8.1.6
Short Circuit withstand level
Refer Annexure B
8.1.6.1
Three phase dead short circuit at For 3 secs. secondary terminal with rated voltage
___________________________________________________________________________________________ Page 17 of 54
SP-EPSX-01-R2
8.1.7
maintained on the other side Single phase short circuit at For 3 secs. secondary terminal with rated voltage maintained on other side Overload capability As per IEC 60905
8.1.8
Noise level
8.1.9
Radio Influence Voltage
Shall not exceed limits as per NEMA TR-1 with all accessories running measured as per IEC 551 / NEMA standard Maximum 250 Microvolt
8.1.10
Harmonic currents
Transformer
8.1.6.2
to
be rd
designed th
suppression of 3 , 5 , 7 voltages
and
high
th
for
harmonic frequency
disturbances. 8.1.11
Partial Discharges
Transformer to be free from partial discharge upto 120 % of rated voltage as the voltage is reduced from 150 % of rated voltage i.e. there shall be no significant rise above background level
8.2
Major Parameters
8.2.1
Rating
400 KVA / 630 KVA / 1000 KVA
8.2.2
Voltage Ratio
11000 / 0.433 kV
8.2.3
Vector Group
Dyn11
8.2.4
Reference
design
ambient 40 deg C
temperature 8.2.5
Type
Dry, core type, step down
8.2.6
Type of cooling
AN
8.2.7
Reference Standard
IS: 11171
8.2.8
No. of phases
3
8.2.9
No. of windings per phase
2
8.2.10
Rated frequency ( Hz )
50 Hz
8.2.11
Highest system voltage HV side
12 kv
8.2.12
Highest system voltage LV side
460 volt
8.2.13
System earthing
8.2.13.1
HV
Solidly earthed
8.2.13.1
LV
Solidly earthed
8.2.14
Percentage Impedance at 130 deg. C
8.2.14.1
400 kVA
5 % with IS tolerance
8.2.14.2
630 kVA
5 % with IS tolerance
___________________________________________________________________________________________ Page 18 of 54
SP-EPSX-01-R2 8.2.14.3
1000 kVA
5 % with IS tolerance
8.2.15
Maximum No load Loss in KW
8.2.15.1
400 kVA
0.90
8.2.15.2
630 kVA
1.2
8.2.15.3
1000 kVA
1.78
8.2.16
Max. full load losses at 130 deg. C, kW at principal tap
8.2.16.1
400 kVA
3.4
8.2.16.2
630 kVA
5.4
8.2.16.3
1000 kVA
7.5
8.2.17
Temperature Rise winding
90 Deg.C
8.2.18
Tap link current rating, Amp
8.2.18.1
400 / 630 kVA
60 A / 100A
8.2.18.2
1000kVA
125 A
8.2.19
Design Clearances
8.2.19.1
Clearances Phase to Phase
A
For nominal system voltage of 11 kV
180 mm min.
B
For nominal system voltage of 415 V
25 mm min.
8.2.19.2
Clearances Phase to Earth
A
For nominal system voltage of 11 kV
120 mm min.
B
For nominal system voltage of 415 V
25 mm min.
8.2.20
System Fault Level , HV side
350 MVA
8.2.21
System Fault Level , LV side
35 MVA
8.2.22
Loss capitalization formulae
As per CBIP manual (see note 1)
8.2.22.1
No load Loss capitalization figure
Rs. 235277 per kW
8.2.22.2
Load loss capitalization figure
Rs. 131454 per kW
8.3
Construction & Design
8.3.1
Core 8.3.1.1
Material
8.3.1.2 8.3.1.3 8.3.1.4
Grade Lamination thickness Design Flux Density at rated conditions at principal tap Maximum Flux Density at 10 % over excitation / over fluxing
8.3.1.5
High grade , non ageing, low loss, high permeability, grain oriented, cold rolled silicon steel lamination Premium grade minimum M4 or better Maximum 0.27 mm 1.7 Tesla maximum allowed 1.9 Tesla maximum allowed
___________________________________________________________________________________________ Page 19 of 54
SP-EPSX-01-R2 8.3.1.6
Core Design Features
8.3.2 8.3.2.1 8.3.2.2 8.3.2.3
Winding Material Maximum Current Density allowed Winding Insulating material
8.3.2.4
Tapping
8.3.2.5
Essential provision for tap links
8.3.2.6
Design features
8.3.2.7
Essential provision of HV and LV winding leads
i) All steel sections used for supporting the core shall be thoroughly sand blasted after cutting , drilling, welding ii) Provision of lifting lugs for core coil assembly
Electrolytic Copper Maximum allowed 3.0 A per sqmm. Class F minimum, free from compounds liable to ooze out, shrink or collapse. Uniform insulation shall be applied to the windings and overall winding shall be cast resin. Off Circuit taps on HV winding , + / - 5 % in steps of 2.5 % , change of taps by link Shall be shrouded with cover made from insulating material. To prevent deposit of dust. Tap link inspection transparent window shall not be provided on the HV side door i)
Stacks of winding to receive adequate shrinkage treatment ii) Connections braced to withstand shock during transport, switching, short circuit, or other transients. iii) Minimum out of balance force in the transformer winding at all voltage ratios. iv) Conductor width on edge exceeding six times its thickness v) The termination bus-bar coming out from winding shall be tinned Copper vi) Transposed at sufficient intervals. vii) Threaded connection with locking facility. viii) Winding leads rigidly supported , using guide tubes if practicable ix) Provision of taps as indicated in the technical particulars Phase marking required near termination on both HV and LV side. Phase colour coding required on insulating sleeves on both HV and LV side. Phase sequence 1U, 1V, 1W from left to right looking inside from the HV side door. Phase sequence 2n, 2u, 2v, 2w from
___________________________________________________________________________________________ Page 20 of 54
SP-EPSX-01-R2 right to left looking inside from LV side door Adequate HV termination clearance. Provisin of check nut in all HV and LV winding lead connection. 8.3.3
Vibration isolation pads shall be Vibration Isolator
installed between core and coil assembly and enclosure base assembly to prevent the transmission of structure borne vibrations.
8.3.4
Bushings/Support Insulator/ terminations
8.3.4.1
8.3.4.3 8.3.4.4 8.3.4.5
Type of HV and LV Bushings, support insulators Minimum Creepage of bushings and support Insulators Arcing horns Termination on HV side Support of HT cable within enclosure
8.3.4.6
Termination on LV side
8.3.5 8.3.5.1 8.3.5.2
Hardware External Internal
8.3.6
Gasket
Neoprene rubber based gasket.
8.3.7
Control cable specification (to be used by the vendor)
8.3.8
Specification of wires to be used inside WTI box etc.
PVC insulated, extruded PVC inner sheathed, armoured, extruded PVC outer sheathed 1100 V grade control cable as per latest edition of IS 1554 part 1 minimum 2.5 sqmm for signals and 4 sqmm for CT with multistrand copper conductor PVC insulated multistrand flexible copper wires of minimum 2.5 sqmm size, 1100 V grade as per latest edition of relevant IS
8.3.9
Terminal Blocks to be used by the vendor
8.3.10
Labels and Name plate
8.3.4.2
Epoxy Resin Cast 25 mm / kV Not required By cable within main enclosure By MS flat of min size 50 x 6 mm By tinned copper busbar within main enclosure
Stainless Steel only Cadmium plated except special hardware for frame parts and core assembly as per manufacturer’s design
Nylon 66 material, minimum 4 sq mm, screw type for control wiring and potential circuit. All name plate, wiring scheme plate, R&D plate , caution plate, danger plate,
___________________________________________________________________________________________ Page 21 of 54
SP-EPSX-01-R2 phase identification plate, identification plate shall be aluminium with black engraving Sticker of any form is not acceptable. 8.3.11
Fixing of name plate
By riveting only at appropriate location.
8.3.12
Insulating support material for base plate for mounting components
Backelite shall not be used as a base plate for mounting any components, insulating material non hygroscopic insulating material like FRP shall be used.
8.4
Minimum Protective devices on Transformer
8.4.1
Surge Arrestor
Required, Connected on Transformer Primary side on all three phases
8.4.1.1
Type
Gapless Metal oxide
8.4.1.2
Housing
Polymeric preferable
8.4.1.3
System Voltage , kV rms
11
8.4.1.4
Rated Voltage of Arrestor, kV rms
9
8.4.1.5
Continuous operating voltage , kV 6.35 rms
8.4.1.6
Maximum
Continuous
operating 7.65
voltage, kV rms 8.4.1.7
Nominal Discharge Current, kA peak
5
8.4.1.8
Energy Absorption Capability, kJ/kV
Greater than 2.5
8.4.1.9
Creepage factor
25 mm /kV
8.4.1.10
Reference std
IS 3070 part 3 and IEC 99-4
8.4.2
Winding Temperature scanner
Required
8.4.2.1
No of RTD inputs
Five (Three for windings, one for enclosure & one shall be spare)
___________________________________________________________________________________________ Page 22 of 54
SP-EPSX-01-R2
8.4.2.2
Location of winding RTD
RTD for enclosure temperature monitoring shall be fixed at enclosure Top from inside to give max. enclosure temp reading & shall be wired upto temp. scanner to indicate the reading At location of winding where maximum temperature is expected.
8.4.2.3
No of potential free trip contacts
Two
8.4.2.4 8.4.2.5
No of potential free Alarm contacts Auxiliary supply
Two 240 V AC, 1 phase, 50 Hz. Tapped from LV side busbar through a MCB located inside box
8.4.2.6 8.4.2.7 8.4.2.8 8.4.2.9
Winding Temperature Scanner terminal Box Size Fixing of instrument within box Fixing of terminals within the box
8.4.2.10
Location
8.4.2.11
Auxiliary Supply in box
8.4.2.12
Essential provision
Required As per Manufacturer’s Standard On base plate On C channel available with the terminals Within enclosure frame such that box door comes in line with enclosure surface Tapped from main LV busbars, taken via MCB for isolation and protection of scanner, MCB to be fixed on DIN rail with clamps on two sides. Wiring diagram to be fixed on the back of door along with brief details of scanner, HV side , LV side door limit switches to be wired up-to Terminal Block, Service socket to be provided with switch, fuse and link.
8.5..0
Fitting and accessories 8.5.1 8.5.1.1 8.5.1.2 8.5.1.3 8.5.1.4 8.5.1.5
Rating & Diagram plate Material Background Letters, diagram & border Process Name plate details
Required Anodized aluminum 16SWG SATIN SILVER Black Etching Following details shall be provided on rating and diagram plate as a minimum i) type of transformer i.e cast resin with winding material ii) standard to which it is manufactured iii) manufacturer's name; iv) transformer serial number; v) month and year of manufacture vi) rated frequency in Hz vii) rated voltages in kV vii) number of phases
___________________________________________________________________________________________ Page 23 of 54
SP-EPSX-01-R2 viii) rated power in kVA ix) type of cooling x) rated currents in A xi) vector group symbol xii) 1.2/50 s wave impulse voltage withstand level in kV xiii) power frequency withstand voltage in kV xiv) impedance voltage at rated current and frequency in percentage at principal, minimum and maximum tap at highest temperature xv) load loss at rated current at highest temperature xvi) no-load loss at rated voltage and frequency xvii) auxiliary loss xviii) continuous ambient temperature at which ratings apply in C xix) winding connection diagram with taps and table of tapping voltage, current and power xx) transport weight of transformer xxi) weight of core and windings xxii) weight of enclosure and fittings xxiii) total weight xxiv) tapping details xxv) phase CT details xxvi) Class of insulation xxvii) IP protection rating of the enclosure xxviii) name of the purchaser xxix) PO no and date xxx) Guarantee period 8.5.2.1
Detachable Bi-directional flat Roller Assembly
Required
8.5.2.2
Essential provision
8.5.3
Earthing pad on enclosure for transformer earthing complete with Stainless Steel nut, bolt, washers, spring washers etc. Core, Frame to tank Earthing Off Circuit tapping link Tap link position plate Danger plate made of Anodized
Roller dia. 150 mm min., roller to be fixed in such a way so that the lowermost part of the skid is above ground by at least 100 mm when the transformer is installed on roller. Required with identification plate on outside of enclosure.
8.5.4 8.5.5 8.5.6 8.5.7
Required Required Required inside HV side door Required
___________________________________________________________________________________________ Page 24 of 54
SP-EPSX-01-R2 aluminum with white letters on red background on HV and LV side 8.5.8 8.5.9 8.5.10 8.5.11
Skid with Haulage lugs Lifting lugs for complete transformer Caution Plate for tap links
Required Required Required
Ventilation louvers with stainless steel wire mesh and rain water guard
Required as per Manufacturer’s design, but it is to be provided minimum required to prevent ingress of excessive dust.
8.5.12 8.5.12.1
Surge Arrestor & its Grounding bushing Essential provision
Required Surge arrestor shall be erected vertically in such a way that the surge arrestor can be removed at site without removing HV cable lug. Surge arrestor shall not be used for any kind of support. Surge arrestor grounding strip to be routed to the surge arrester grounding bushing near bottom of enclosure with proper support. Surge arrestor grounding bushing shall be identified by identification plate on outside of enclosure. Surge arrestor grounding bushing shall be supplied with all hardware to readily connect purchaser’s ground lead.
8.5.13
LV neutral grounding provision
Required, min. 20 nos
8.5.13.1
Essential provision
LV neutral to be grounded at two different earth pit by 50X6mm GI strip.
8.5.14
Winding temperature scanner
8.5.15
Required Required
RTD in Winding and near top of enclosure.
___________________________________________________________________________________________ Page 25 of 54
SP-EPSX-01-R2
9.0 Low voltage Bus bar system The equipment shall have all the following features 9.1
LV bus bar
9.2
Type of connection on transformer
9.3
Bus bar size for phase & neutral
9.4 9.5 9.6 9.7
Bus bar support insulators Insulator creepage distance Bus bar sleeve insulation Bus bar rated current
9.8 9.9
Bus bar short circuit withstand Maximum temperature rise
10.0
From transformer LV bushing to ACB and from ACB to MCCBs By flexible copper link rated 2000 / 1250 / 800 Amp for 1000KVA / 630 KVA / 400 KVA transformers. Tinned copper busbar, size shall be as per manufacturer design. All the phases and neutral busbar shall be same rating / size. Suitable spreader to be provided at outgoing side of MCCB to connect 300 sqmm cable through aluminum lug. 1 kv voltage class, SMC epoxy 25mm / kv Color coded, for 1kv Suitable for 2000A / 1250A / 800A continuous current rating within the 10K class enclosure @ 400 C ambient temp 50 kA for 1 sec 20 deg C above ambient 40 deg C
Low voltage switchgear, ACB & MCCB.
The equipment shall have all the following features 10.1.0 Fixed type 3 pole with fully isolable Air Circuit Breaker (ACB) neutral link, one break per pole 10.1.1 ACB - On & OFF operation Manual as well as electrical by spring charged mechanism 10.1.2 ACB operating mechanism Trip free, anti pumping type 10.1.3 Spring charging method Manual as well as electric motor 10.1.4 Spring charging motor supply 1 ph 240v tapped from LV bus bar 10.1.5 Close & trip coil supply 1 ph 240v tapped from LV bus bar 10.1.6 ACB Neutral connection Fully isolable link sized for 2000 Amp 10.1.7 ACB rated voltage 415v +/- 10% at 50Hz 10.1.8 ACB rated current 2000 A / 1250 A / 800A continuous 10.1.9.1 ACB rated 3 phase short circuit 50kA minimum at 415v and 50Hz breaking capacity Ics = Icu 10.1.9.2 ACB rated 3 phase short circuit 50kA for 1sec withstand capacity, Icw 10.1.10 ACB SC making current capacity 100kA peak 10.1.11 ACB rated insulation level 1000volt 10.1.12 ACB mechanical & electrical As per IS 13947 / IEC endurance ___________________________________________________________________________________________ Page 26 of 54
SP-EPSX-01-R2 10.1.13 10.1.14 10.1.15 10.1.16 10.1.17 10.1.18 10.2.0
10.2.1 10.2.2 10.2.3 10.2.4 10.2.5 10.2.6 10.2.7 10.2.8 10.2.9 10.2.10 10.2.11 10.2.12 10.2.13 10.2.14
10.2.15
11.0
ACB utilization category as per IS ACB indications ACB operation - manual ACB operation - electrical ACB overload, short circuit & earth fault protection Approved make of ACB MCCB a) For 990/1000 KVA
B ON, OFF & TRIP ON, OFF by push buttons ON, OFF by TNC switch By static or micro processor based releases
Outgoing feeders – 7 nos 400Amp APFC system – 1 no. 630 Amp b) For 630 KVA Outgoing feeders – 5 nos 400Amp APFC system – 1 no. 400 Amp c) For 400 KVA Outgoing feeders – 5 nos 400Amp APFC system – 1 no. 400 Amp MCCB type 3 pole, one break per pole MCCB - On & OFF operation Manual by handle MCCB Neutral connection Fully isolable link sized for rated current MCCB rated voltage 415v +/- 10% at 50Hz MCCB rated continuous current 400 Amp 630 Amp MCCB rated 3 phase short circuit 35kA minimum at 415v and 50Hz breaking capacity Ics = Icu MCCB rated 3 phase short circuit 8kA for 1sec withstand capacity, Icw MCCB SC making current capacity 75kA peak MCCB rated insulation level 1000volt MCCB mechanical & electrical As per IS 13947 / IEC endurance MCCB category of duty B as per IS / IEC 947 MCCB indications ON, OFF & TRIP MCCB protection Thermal magnetic release + earth fault Connection to ACB main bus By tinned Cu bar with double PVC insulation Size of busbar shall be as per manufacturer design. Connection to outgoing cables By terminals suitable upto 4cx300sqmm AYFY 1100 volt grade cable Automatic Power Factor Correction system
The APFC equipment shall be located in LV compartment of package enclosure and shall have all the following features 11.1 11.2
APFC rating APFC mounting
300 KVAR / 200 KVAR All components mounted in shelf type arrangement on package substation enclosure LV compartment wall or RMU compartment wall
___________________________________________________________________________________________ Page 27 of 54
SP-EPSX-01-R2 11.3
APFC relay & data logger
11.4
APFC system bus bar size
11.5
APFC system CT input signal
11.6
APFC capacitor modules a) For 300KVAR b) For 200 KVAR Capacitor duty contactor for each capacitor module MCCB for each capacitor module Connection to each MCCB from APFC system bus APFC control supply
Mounted on base plate supported on compartment wall by three hinges 50x10mm tinned copper mounted on SMC insulators 1100v grade From CT on transformer LV side by 7c2.5sqmm YY 1100v grade cable
6X50 KVAR three phase compensation 8X25 KVAR three phase compensation 11.7 Utilization category 6b as per IS, make – ABB only 11.8 100 Amp, Three Pole, Ics=Icu=35kA By 35sqmm copper wire double 11.9 insulated with tinned copper lugs 11.10 Through 415/240v transformer, 2amp / 6amp SP MCB 11.11 APFC relay Microprocessor based relay for automatic control of minimum 12 capacitors in sequential or cyclic switching fashion with settable time delay 0 -180 sec 11.12 APFC relay LCD display with self To show no. of capacitors energized, monitoring feature actual PF & target PF, voltage & current 11.13 Target power factor setting range 0.8 lag to 0.9 lead in steps of 0.1 11.14 APFC relay sensing 3 phase CT input 5 amp to sense max load current 11.15 No volt protection in relay To switch OFF all capacitors 11.16 Capacitor unit 50KVAR type Double layer All Poly Propylene (APP) or Mixed Poly Propylene (MPP) 11.17 Capacitor unit construction 1.5mm thick sheet metal welded tank or Al cylindrical construction 11.18 Capacitor unit impregnant Dry type filler or non PCB liquid 11.19 Capacitor unit conducting layer Al foil or metalised film 11.20 Capacitor sealing Hermetic sealing after vacuum process 11.21 Capacitor unit safety Pressure sensitive dis connector or internal fuse for each element 11.22 Discharge resistor Between all three phases of capacitor unit, to reduce the voltage across the capacitor to 50V or less in one minute 11.23 Terminal bushings For rated voltage class 1 KV Suitable wires / terminals brought out from capacitor unit is also acceptable. 11.24 Earth connection for individual To be done & connected to main earth capacitor container bus bar of the panel 11.25 APFC Operational features 11.25.1 Automatic power factor correction To achieve target lagging power factor without hunting 11.25.2 Operation for rated output At continuous rated voltage (440 V) & ___________________________________________________________________________________________ Page 28 of 54
SP-EPSX-01-R2 frequency (50 Hz) 115% of rated voltage for 12 hours in a day Operation with harmonic distortion THD voltage – 5% & THD current 3% Maximum permissible over current 1.3 times rated current, continuous Dielectric loss 0.2 watt per KVAR maximum Temperature Category & - 5 / 60 deg C Maximum temperature rise Not exceeding 10 deg C over 60 deg C. Residual voltage after 50 volts maximum after 60 seconds disconnection from mains Design life of capacitor unit Minimum 10 years Data Logger (approved by requisite authority / Electrical inspector) Accuracy class 0.5, microprocessor based with LCD display, with 3 CTs for measurement of Kwh cumulative, power factor, voltage & current of transformer secondary, THD of voltage. Data logging of Kwh value at every 30 minutes to give cumulative reading of Kwh for 45 days minimum, data downloadable in ASCII-II or MS Excel format - Display of DATE, TIME, station ID - Display & log power parameters phase wise & total ( load current, kVA, kW & PF). - Display & log kVAr phase wise & total. - Display TDH V or current. - The logger shall be with built in communication facility of RS485 / RS232 to down load all parameters on demand. APFC approved make of components Switch ABB / Siemens / L&T (Salzer) HRC Fuse Links Alstom / Siemens / L&T / GE Load manager L&T / Enercon / AE / DUCATI Phasetrac M-40 APFC relay Beluk / ABB / Fraco / Ducati AC Contactors ABB Terminals Connectwell / Elmex Push buttons / Actuator L&T / Teknic / Siemens MCCB ABB / L&T / Siemens Capacitor ABB / Universal / Shreem
11.25.3 Operation with over voltage 11.25.4 11.25.5 11.25.6 11.25.7
11.25.8 11.25.9 11.26.0 11.26.1
11.26.2
11.26.3
11.27 11.27.1 11.27.2 11.27.3 11.27.4 11.27.5 11.27.6 11.27.7 11.27.8 11.27.9 12.0
Energy metering - LT
The equipment shall have all the following features 12.1 12.2
Energy meter Energy meter box
12.3
Energy meter box Size
12.4
Fixing of energy meter within box
By Purchaser To be provided mounted on enclosure wall in LV compartment 650 mm height x 450 mm width x 275 mm depth. On slotted horizontal channel 40 x 12
___________________________________________________________________________________________ Page 29 of 54
SP-EPSX-01-R2
12.5 12.6
12.7
12.8 12.9
12.10 12.11 12.12 12.13
13.0
mm size, channel shall be movable on vertical slotted angle 40 x 40 mm size at two ends No of horizontal channels to be Four provided Fixing of terminal blocks within the On horizontal slotted channel with the box help of C channel available with the terminals Box door design with antitheft hinge, padlock facility, door fixed by stainless steel Allen screw M6 size Terminal strip As per Cl. 4.7 of the specs. Cables and wires PVC insulated, extruded PVC inner sheathed, armored, extruded PVC outer sheathed 1100 V grade control cable as per latest edition of IS 1554 part 1 minimum 2.5 sq mm for signals and 4 sq mm for CT with multi strand copper conductor. Cable Glands Nickel plated brass double compression weatherproof cable gland Lugs on wires Tinned copper Potential signal in CT box Tapped from main LV bus bar Wiring diagram To be fixed on the back of door along with CT spec. on Aluminum engraved plate fixed by rivet. Enclosure for packaged substation
The enclosure shall house all the components listed in clause 4.0 and shall have all the following features 13.1 13.2
Service conditions Material for enclosure
13.3
Enclosure construction
13.4
Lifting lugs for site handling / lifting by crane Doors for RMU compartment & LV compartment
13.5
13.6 13.7 13.8 13.9
For outdoor use as per Annexure B Galvanized sheet steel 2 mm thick CRCA for all side doors, covers Frame supported construction with all doors, covers welded with steel channel ribs at every 1000mm minimum Four numbers on top to enable lifting of total package unit without any problem With anti theft hinge minimum 3 nos., with lockable handle & with padlocking facility Bolted with Allen head type bolts to main frame Welded sheet metal to main frame
Two side covers for transformer compartment Top & other side walls of package substation enclosure Removable canopy above top cover Min. 2 mm thick galvanized sheet metal with 10º slope Enclosure integral steel base frame ‘I’ section of suitable size to support
___________________________________________________________________________________________ Page 30 of 54
SP-EPSX-01-R2 total static and dynamic load 13.10 Base frame bottom support pads for Minimum six numbers to rest on fixing by bolt to foundation foundation 13.11 Enclosure compartments Separate compartments for RMU, transformer & LV switchgear/APFC 13.12 Separation between RMU & By sheet steel 2 mm thick transformer compartment 13.13 Separation between transformer By sheet steel 2 mm thick compartment & LV compartment 13.14 Degree of ingress protection IP53 for RMU compartment against solids & water as per IP23 for transformer compartment IS12063 IP33 for LV compartment 13.15 Louvers on side covers of To be provided with steel wire mesh transformer compartment & side welded from inside so as to meet IP walls of LV compartment requirement as above 13.16 Louver area on cover / side wall 1500mm height x 1500mm desirable 13.17 Louver position from bottom level Minimum 200mm above bottom 13.18 Gland plate for RMU compartment 3 mm thick MS plate suitable for 3x3c300sqmm AYFY 11kv cable. Gland plate to be split type in two parts 13.20 Gland plate for LV compartment 3 mm thick MS plate suitable for 8 nos / 6 nos x4c300sqmm cable + 10x7c2.5sqmm cable. Gland plate to be split type. 13.21 Class of enclosure as per IEC 10K 62271-202 13.22 Limiting dimensions of package 3800(L) x 2500(W) x 2500(H) enclosure 14.0
Earthing & Illumination
The enclosure shall have provision for earthing & illumination system as per following14.1.1 Earth bus connection brought out of package substation enclosure to earth pad for connection to earth pit 14.1.2 Earth bus Material 14.1.3 Earth bus fault current capacity 14.1.4 Earth connection of all covers, doors & structural parts to GI bus 14.1.5 Earth connection of RMU, ACB & transformer body parts to GI bus 14.1.6 Earth bus identification 14.2.1 RMU, transformer & Compartment illumination 14.2.2 RMU, transformer & compartment power socket
Two earth pads for RMU, transformer & LV compartment each Two earth pads for transformer neutral GI flat 26.3kA for 3 sec By metallic jumper connection By two numbers of 50x6mm GI flat per equipment Shown by letter ‘E’
LV By 36w CFL fixture controlled through SPMCB & door limit switch LV 5/15amp 3 pin socket controlled through 15 amp SPMCB
___________________________________________________________________________________________ Page 31 of 54
SP-EPSX-01-R2 15.0
Labels & painting
The equipment shall have all the following features 15.1 15.1.1 15.1.2 15.1.3
Name plate on package enclosure Material Background Letters, diagram & border
Fixing by rivet only Anodized aluminum 16SWG / SS SATIN SILVER Black
15.1.4 Process 15.2 Name plate details
15.3
15.4 15.5 15.6
Etching Month & year of manufacture, transformer rating, purchaser name & order number, guarantee period Labels for meters & indications Anodized aluminum with white character on black background OR 3 ply Lamicoid Danger plate on doors of RMU Anodized aluminum with white letters compartment & LV compartment on red background Enclosure painting surface Shot blasting or chemical 7 tank preparation process Enclosure painting external finish Hot dip galvanizing – 80 micron thick
15.7
Enclosure painting internal finish
15.8
BSES name plate
16.0
Powder coated epoxy polyester base grade A, shade - RAL 7032, uniform thickness 60 micron minimum Powder coated epoxy polyester base grade A, shade - white, uniform thickness 80 micron minimum At the center along the length “BSES” with anodized aluminum plate of size 14” approved by purchaser shall be fixed on PSS enclosure.
Approved make list of major equipments.
16.1
3 Way RMU
16.2
Oil type distribution transformer
16.3
Dry type distribution transformer
16.4 16.5 16.6
ACB MCCB 11KV cable
ABB / Areva / CGL / Schneider / Siemens CGL / Kotsons / Areva / Kanohar / EMCO / Kirloskar / Voltamp or any other make approved by BSES. Voltamp / Kirloskar or approved make of BSES. L&T / Schneider / ABB / GE / Siemens L&T / GE / Schneider / ABB / Siemens Universal / KEI / Polycab / Hindusthan vidyut / RPG / Havells / torrent
___________________________________________________________________________________________ Page 32 of 54
SP-EPSX-01-R2 17.0
Quality assurance by Vendor
17.1
Vendor quality plan
17.2 17.3
Inspection points To be mutually identified & agreed in quality plan. List of all tests to be witnessed by Purchaser shall be given in Quality plan
18.0
To be submitted for purchaser approval for all components listed in clause 4.0
Inspection & testing
One complete package unit shall be tested for type tests and every package unit shall be tested for temperature rise test. The testing of package units shall be as per following 18.1 Type test as per IS / IEC Equipment of type tested quality only to be offered. Type test conducted shall not be more than five years old. 18.2 Type test certificate to be submitted along with offer for 11kv RMU, 990KVA sealed type / dry type transformer, 2000amp ACB, 400amp & 630amp MCCB, 50KVAR capacitor. Transformer’s thermal & dynamic short circuit test report and chopped wave impulse test report to be submitted. 18.3 Following test shall be done on one unit in addition of test as per clause no.- 16.8 18.4 On total package substation Functional test assembly as per IEC62271-202 Temperature rise test 18.5 On 11kv RMU Breaker opening and closing time measurement. 18.6 On 990KVA transformer Temperature rise test Noise measurement test Measurement of harmonic on no-load current. Zero sequence impedance Capacitance and dissipation factor between winding to earth and in between winding. 18.6
On ACB & MCCB
18.8
Routine & acceptance test
18.9
Right to waive off tests
19.0
Primary current injection test ( tripping and non tripping characteristic test) To be carried out as per IEC 62271-202 and approved QAP. Reserved by Purchaser
Shipping, Handling and Site support
19.1
Packing for transportation
19.2
Packing identification label
Protection against rain, dampness, vibration required To show purchaser name, address, purchase order number, equipment name, quantity.
___________________________________________________________________________________________ Page 33 of 54
SP-EPSX-01-R2 19.3 20.0
Accessories & tools
Packed in separate wooden case or box
Deviations
Deviations from this Specification shall be stated in writing with the tender by reference to the Specification clause / GTP/ Drawing and a description of the alternative offer. In absence of such a statement, requirements of the Specification shall be met without exception.
___________________________________________________________________________________________ Page 34 of 54
SP-EPSX-01-R2 Annexure - A
Scope of supply
1.0
The scope of supply shall include following
1.1
Design, manufacture, testing at manufacturer works before dispatch, packing, delivery and submission of all documentation of Packaged substation with all accessories as per specification and supply of commissioning spares.
1.2
Packaged substation as per as per technical specification & GTP
1.3
Supervision of testing & commissioning of Packaged substation at site
1.4
BOQ as following -
Sr
Purchaser
Location / Substation
No
Equipment Tag No name
Unit
Quantity
No
e.g. 1
/ SAP code 1 2
e.g. Alaknanda
3
2.0
Submission of documents
2.1
Submission with Bid (2 hard copies + 2 soft copy in CD format)
i.
GA drawing (Complete assemble, RMU, transformer, LT panel + other items)
ii.
BOM of Packaged substation
iii.
Quality plan for Packaged substation
iv.
Type test reports of identical type of Packaged substation components
v.
Guaranteed technical particulars of Packaged substation
vi.
Calculation for sizing of Transformer
vii.
Catalogues & manuals for RMU + Transformer + LT switchgear items + APFC + Energy meter
2.2
Submission after award for approval (2 hard copies + 2 soft copy in CD format )
i.
GA drawing (as above)
ii.
BOM of Packaged substation
iii.
Quality plan Packaged substation
iv.
GTP of Packaged substation
___________________________________________________________________________________________ Page 35 of 54
SP-EPSX-01-R2 v.
Installation, commissioning manual for all items in Packaged substation. (for information)
vi.
Operation & maintenance manual for all items in Packaged substation. (for information)
2.3
Submission of final approved documents (2 hard copies + 2 soft copies in CD format ) All above documents as per clause 2.2 above
3.0
Delivery schedule
3.1
Delivery period start date
-
from date of purchase order
3.2
Delivery period end date
-
as agreed with supplier
3.3
Material dispatch clearance
-
after inspection by purchaser
___________________________________________________________________________________________ Page 36 of 54
SP-EPSX-01-R2 Annexure - B
Technical particulars (Data by purchaser)
The package substation shall be designed & tested to operate satisfactorily under following conditions Sr Description Data by purchaser No 1 Location of equipment Delhi Outdoor 2
Reference design ambient temperature
Delhi
40 deg C
3
Maximum ambient temperatue
Delhi
50 deg C
4
Relative humidity
Delhi
85% for Delhi
5
Seismic zone as per IS 1893 part1
Delhi
Zone IV
Note -
___________________________________________________________________________________________ Page 37 of 54
SP-EPSX-01-R2 Annexure - C
Guaranteed Technical Particulars (Data by Supplier)
Sr. No.
Description
1 2
Manufacturer Name Manufacturer Address telephone no Manufacturer contact person Manufacturer brand name (Give catalogue reference) RMU Equipment make Equipment type / brand name Conformance to specification If NO for above, Submission of clause wise deviation sheet Panel overall dimensions in mm Width (measured from front) Depth height Panel weight in kg Panel enclosure protection offered Panel tested for internal arc Insulation level for complete panel Impulse withstand Power frequency withstand Bus bar Material & grade Bus bar cross section area in sq mm Bus bar rated current in amp a) At designed 40 Deg.C ambient b) At 50 Deg.C ambient. Max temperature rise above reference ambient of 40 deg C Short time current withstand capacity for 3 seconds (in KA) Bus bar clearances in mm P-P / P-E Bus bar with insulation sleeve / barriers Bus bar support insulator type Bus bar support insulator voltage class Bus bar support insulator minimum creepage distance / mm Earth bus bar material Earth bus bar size Circuit breaker type – SF6 or VCB Rated voltage & frequency
3 4 5 5.1 5.2 5.3 5.4 5.5
5.6 5.7 5.8 5.9 5.9.1 5.9.2 5.10 5.10.1 5.10.2 5.10.3
5.10.4 5.10.5 5.10.6 5.10.7 5.10.8 5.10.9 5.10.10 5.11.11 5.10.12 5.11 5.11.1
Data to be filled by Manufacturer
Yes/No Yes/No
Yes / No (Kv peak) (Kv rms)
___________________________________________________________________________________________ Page 38 of 54
SP-EPSX-01-R2 5.11.2 5.11.3 5.11.4 5.11.5 5.11.6 5.11.7 5.11.8 5.11.9
5.11.10 5.11.11
5.11.12 5.11.13 5.11.14 5.12 5.12 5.12 5.12 5.12 5.12 5.12
5.12.1 5.12.2 5.12.3 5.12.4 5.12.5 5.12.6 5.12.7
Rated current in amp Rated breaking current – KA rms symmetrical Short time withstand capacity in KA for 3 sec Rated making current - KA peak Breaker total opening time at rated breaking capacity (in milliseconds) Number of breaks per pole Total length of contact travel in mm No of circuit breaker operation cycles 25% rated current (close & open) guaranteed at rated current 50% rated current 75% rated current 100% rated current No of breaker opening operations guaranteed at rated fault current No of breaker mechanical operation cycles (close & open) guaranteed at zero current Contact material Operating mechanism – trip free Manual Sprig charge type Load break switch type – SF6 or VCB Rated voltage & frequency Rated current in amp Load break switch total opening time at rated current (in milliseconds) Number of breaks per pole Total length of contact travel in mm No of LBS close & open operation 25% rated current cycles guaranteed at 50% rated current 75% rated current 100% rated current No of LBS making operations guaranteed at rated fault current No of LBS close & open operations guaranteed at zero current Contact material Operating mechanism type Operating motor voltage with acceptable % variation Minimum permissible SF6 gas pressure (For SF6 type RMU only) Capacitor type cable voltage Yes / No indication provided?
___________________________________________________________________________________________ Page 39 of 54
SP-EPSX-01-R2 5.12.8 5.12.9 5.12.10
5.12.11 5.12.12 5.12.13 5.12.14 6.0 6.1 6.2 6.3 6.4 6.5 6.6 7.0 7.1 7.2 7.3
7.4
7.5
7.6 7.7
7.7.1 7.7.2 7.8 7.9 7.10
Operation counter provided – Yes/ No One LBS open operation possible in Yes/No the event of loss of SF6 gas – HT Cable termination - 3c300sqmm mm AYFY cable– Height of power terminal from gland plate Mimic diagram, labels & finish as per Yes / No specification Submission of RMU / component Yes/No catalogue – Fault passage indicator make on LBS CT ratio & burden 11kv cable from RMU to transformer Cable size 3c150 sqmm AYFY Yes/No Cable rated voltage - 11000v Yes/No Cable short circuit current capacity kA for 1 sec Type of insulation - XLPE Yes/No Outer insulation sheath – PVC with Yes/No armor Cable termination type & make 990KVA sealed type transformer Make Type - Oil immersed, core type, step Yes/No down Transformer continuous rating when placed in package substation enclosure HV winding KVA LV winding KVA Rated voltage ( kV ) HV Winding – 11000 volt LV Winding - 433 volt Rated current HV Winding Amps LV Winding Amps Transformer vector group – Dyn11 Yes / No 5.0 % with IS tolerance Impedance at principal tap rated current and frequency, ohm @75 deg C Impedance at lowest tap Impedance at highest tap Resistance of the winding at 750 C in a) HV b) LV ohm Zero sequence impedance in ohm a) HV b) LV Guaranteed maximum losses at principal tap full load and 75°C without any positive tolerance,
___________________________________________________________________________________________ Page 40 of 54
SP-EPSX-01-R2
7.11
7.12
7.13
7.14 7.15
7.16
7.17.1 7.17.2 7.17.3 7.17.4 7.17.5 7.18 7.19
kW No load losses (max.) Load losses (max.) Total losses (max.), No load loss at maximum permissible voltage and frequency (approx.), Temperature rise over reference ambient of 40 0C Top oil by thermometer 0 C 0 Winding by resistance C Efficiency at 100% load at 50% load at 25% load Efficiency at 100% load at 50% load at 25% load Load and power factor at which Maximum efficiency occurs Regulation at full load at 750 C at unity power factor at 0.8 power factor lagging Regulation at 110% load at 750 C at unity power factor at 0.8 power factor lagging Tapping Capacity Range-steps x % variation Taps provided on HV winding Rated current of rotary switch 100Amp Corrugated plate tank cooling Tank material
7.20.1 7.20.2
Thickness of sides mm Thickness of bottom mm Thickness of cover mm Tank designed and tested for Vacuum, Pressure ( Ref: CBIP Manual ) Vacuum mm of Hg. / (kN/m2) Pressure mm of Hg.
7.20.3 7.20.4 7.20.5
Is the tank lid sloped? Inspection cover provided Location of inspection cover
7.20
KW KW KW kW
30 0C 40 0C at 750C and unity power factor
at 750C and 0.8 power factor lag
Off circuit Full capacity Yes / No Yes / No ONAN Robust mild steel plate without pitting and low carbon content
Yes/ No
Twice the normal head of oil / normal pressure + 35kN/m2 whichever is lower, As per CBIP Yes / No Yes / No Yes / No
___________________________________________________________________________________________ Page 41 of 54
SP-EPSX-01-R2 7.21 7.21.1
Core Core material grade
7.21.2 7.21.3
Core lamination thickness Insulation of lamination
7.21.4
Design flux density at rated condition at principal tap, Tesla Maximum flux density at 10 % over excitation / over fluxing, Equivalent cross section area mm² Guaranteed No Load current at 100% rated voltage , Amps HV LV Guaranteed No Load current At 110% rated voltage, Amps HV LV Type of Winding HV LV Conductor material Current density (HV/LV)
7.21.5 7.21.6 7.22
7.23
7.24 7.24.1 7.24.2 7.24.3 7.24.4 7.25
7.26
7.27
7.28 7.28.1 7.28.2 7.28.3 7.28.4 7.28.5 7.28.6 7.28.7 7.28.8 7.29
Gauge/area of cross section of conductor a) HV b) LV Insulating material HV Turn LV Turn LV Core HV - LV Transformer insulation Polarization Index value (Min 1.3 as per CBIP) Transformer insulation IR value for HV winding (Min 2000Mega Ohm) Minimum design clearance, mm HV to earth in Air HV to earth in oil LV to earth in Air LV to earth in oil Between HV & LV in Air Between HV & LV in oil Top winding and yoke Bottom winding and yoke Insulating oil
Premium grade minimum M4 or better Max. 0.27 mm With insulation coating on both sides 1.7 Tesla 1.9 Tesla
Less than 2% of RFLC Less than 2% of RFLC
Electrolytic Copper Maximum allowed 3.0 A per sqmm.
type & thickness in mm
___________________________________________________________________________________________ Page 42 of 54
SP-EPSX-01-R2 7.29.1 7.29.2 7.29.3 7.29.4 7.29.5 7.29.6 7.30 7.30.1 7.30.2 7.30.3 7.30.4 7.30.5 7.30.6
Quantity of oil In the Transformer tank In each radiator Total quantity 10% excess oil furnished? Type of Oil Bushing / Support Insulator Make Type HV side LV side Reference Standard Voltage class, kV i) HV side Bushing/ Support Insulator ii) LV side line and neutral bushing/ Support Insulator 7.30.7 Creepage factor for all bushing / Support Insulator mm/KV 7.30.8 Rated thermal short time current HV bushing LV line and neutral bushing 7.30.9 Weight, Kg HV bushing LV line and neutral bushing 7.30.10 Free space required for bushing removal, mm HV bushing LV line and neutral bushing 7.31 Terminal connections for cable size HV LV LV Neutral 7.32.1 Phase to phase clearance HV, mm 7.32.2 Phase to earth HV, mm 7.33.1 Phase to clearance in LV, mm 7.33.2 Phase to earth in LV, mm 7.34 Current Transformer on LV phases 7.34.1 Type 7.34.2 Make 7.34.3 Reference Standard 7.34.4 CT Ratio 7.34.5 Burden, VA 7.34.6 Class of Accuracy / ISF 7.34.7 CT terminal box size 7.35.1 Pressure release device on tank make 7.35.2 Minimum pressure the device is set to rupture
Ltrs
Yes / No
12 kV 1.1 kV 25 mm / kV
3c150 sqmm AYFY 11kv tinned copper bus bar tinned copper bus bar 180 mm minimum 120 mm minimum 25 mm minimum 25 mm minimum
___________________________________________________________________________________________ Page 43 of 54
SP-EPSX-01-R2 7.36
7.37
7.38
7.39 7.39.1 7.39.2 7.39.3 7.39.4 7.39.5 7.39.6 7.40 7.41 7.41.1 7.41.2 7.41.3
Fittings Accessories Each Transformer furnished as per Clause 7.3.0 Painting: as per clause for the transformer, cable boxes, Marshalling box Over all transformer dimensions Length, mm Breadth, mm Height, mm Weight data Core Winding Frame Tank Weight of oil in Tank Total Transport weight of the transformer Transformer total oil volume Tests on transformer All Type Tests confirmed as per specification All Routine Tests confirmed All Special Tests confirmed as per specification
Yes/No
Yes/No
kG kG kG kG kG kG litres Yes / No Yes / No Yes / No
8.0
400KVA / 630 KVA / 1000 KVA Dry type transformer.
8.1.0 8.1.1 8.1.2 8.1.3
8.2.0 8.2.1 8.2.2
General Make Type core type , outdoor, step down Full rating available for installation of the same transformer in indoor poorly ventilated condition ( YES/ NO) Nominal Continuous Rating, KVA HV winding 400/630/1000 LV winding 400/630/1000
8.3.0 8.3.1 8.3.2
Rated voltage ( kV ) HV Winding LV Winding
8.4.0 8.4.1 8.4.2
Rated current ( Amps ) HV Winding LV Winding
8.5.0 8.5.1 8.5.2 8.5.3
Connections HV Winding LV Winding Vector Group reference
11 0.433
Delta Star with additional Neutral Dyn11
___________________________________________________________________________________________ Page 44 of 54
SP-EPSX-01-R2 8.6.0
8.6.1 8.6.2 8.6.3 8.6.4 8.6.5
8.7.0
Impedance at principal tap rated current and frequency at 130 deg C, ohm Impedance 5/5/5 Reactance Resistance Impedance at lowest tap rated current and frequency Impedance at highest tap rated current and frequency 0
8.7.1 8.7.2
Resistance of the winding at 130 ohm HV LV
8.8.0 8.8.1 8.8.2
Zero sequence impedance, ohm HV LV
8.9.0
Guaranteed maximum losses at principal tap and at 130 deg C full load without any positive tolerance, kW No load losses (max.) As per rating from Cl. 19.0 of Annexure B Load losses (max.) As per rating from Cl. 20.0 of Annexure B Total losses (max.)
8.9.1 8.9.2 8.9.3 8.10.0 8.10.1 8.10.2 8.11.0 8.11.1 8.11.1.1 8.11.1.2 8.11.1.3 8.11.1.4 8.11.1.5 8.11.1.6 8.11.2 8.11.2.1 8.11.2.2 8.11.2.3 8.11.2.4 8.11.2.5
C,
Temperature rise over reference ambient Winding by resistance 0 C 90 0C Maximum hot spot temperature, deg. C Efficiency Efficiency at 130 factor, % at 110% load at 100% load at 80% load at 60% load at 40% load at 20% load
0
C and unity power
Efficiency at 130 0C and 0.8 power factor lag % at 110% load at 100% load at 80% load at 60% load at 40% load
___________________________________________________________________________________________ Page 45 of 54
SP-EPSX-01-R2 8.11.2.6
at 20% load
8.11.3 8.11.4
Maximum efficiency at 130 0C, % Load and power factor at which it occurs
8.12.0 8.12.1 8.12.1.1 8.12.1.2 8.12.2 8.12.2.1 8.12.2.2
Regulation Regulation at full load at 1300 C at unity power factor at 0.8 power factor lagging Regulation at 110% load at 1300 C at unity power factor at 0.8 power factor lagging
8.13.0 8.13.1 8.13.2
Core Type: Core material grade
8.12.3 8.13.4 8.13.5
Thickness of lamination mm Insulation of lamination With insulation coating on both sides Design Flux Density at rated condition at principal tap, Tesla Maximum flux density at 10 % 1.9 Tesla maximum allowed overexcitation /overfluxing, Tesla Equivalent cross section area ................... -
8.13.5.1 8.13.6 8.13.7 8.13.7.1 8.13.7.2 8.13.8 8.13.8.1 8.13.8.2 8.14.0 8.14.1 8.14.2 8.14.3 8.14.4 8.14.4.1 8.14.4.2 8.14.5 8.14.5.1 8.14.5.2 8.14.6 8.14.7 8.15.0 8.15.1
Core Premium grade minimum M4 or better
Guaranteed No Load current At 100% rated voltage , Amps HV LV Guaranteed No Load current At 110% rated voltage, Amps HV LV Type of Winding HV LV Conductor material Electrolytic Copper Current density Amps/sqmm Maximum allowed 3.0 A per sqmm. HV winding LV winding Gauge/area of cross section of conductor, sqmm a) HV b) LV Tappings provided as per Cl. 32.0 of Annexure B (YES / NO) Tap link Current rating , A As per Cl. 32.1 of Annexure B , as per rating Insulating material HV Turn
___________________________________________________________________________________________ Page 46 of 54
SP-EPSX-01-R2 8.15.2 8.15.3 8.15.4
LV Turn LV Core HV - LV
8.16.0 8.16.1 8.16.2 8.16.3 8.16.4
Insulating material thickness, mm HV Turn LV Turn LV to Core HV to LV
8.17.0 8.17.1 8.17.2 8.17.3 8.17.4 8.17.5
Minimum design clearance, mm HV to earth in Air LV to earth in Air Between HV & LV in Air Top winding and yoke Bottom winding and yoke
8.18.0 8.18.1 8.18.2 8.18.3 8.18.4 8.18.4.1 8.18.4.2
Bushing / Support Insulator Make Type Reference Standard Voltage class, kV HV side Bushing / Support insulator LV side line and neutral bushing / Support insulator Creepage factor for all bushing mm/KV 31 mm / kV Weight, Kg HV bushing / Support insulator LV line and neutral bushing / Support insulator Free space required for bushing / Support insulator removal, mm HV bushing / Support insulator LV line and neutral bushing / Support insulator
8.18.5 8.18.6 8.18.6.1 8.18.6.2 8.18.7 8.18.7.1 8.18.7.2
8.19.0 8.19.1 8.19.2 8.19.3 8.19.3.1 8.19.3.2 8.19.3.3 8.19.3.4 8.19.3.5 8.19.3.6 8.19.3.7 8.19.3.8 8.20.0
Terminal connections HV LV Terminal Details HV side busbar size HV Termination suitable for cable size HV Termination height, mm HV side Phase to earth clearance, mm HV side phase to phase clearance, mm LV side busbar size LV side Phase to phase clearance, mm LV side Phase to earth clearance, mm WT scanner terminal box size
8.21.0
Alarm and Trip contact ratings of
1000 mm, minimum
___________________________________________________________________________________________ Page 47 of 54
SP-EPSX-01-R2 8.21.1 8.21.1.1
protective devices Rated / making/ breaking currents , Amp @ Voltage for Winding temperature scanner
8.22.0
Fittings and Accessories as per Cl. 8.5.0 provided (YES / NO)
8.23.0 8.23.1 8.23.2 8.23.3
Over all transformer dimensions Length, mm Width, mm Height, mm
8.24.0 8.24.1 8.24.2 8.24.3 8.24.4 8.24.5 8.24.6
8.25.0
Weight data Core, kG Frame parts, kG Core and frame, kG Total Winding, kG Core , Frame, Winding, kG Total Transport weight of the transformer, kG Total weight of the transformer with all accessories Surge Arrestor requirement
8.25.1
Type
8.25.2
System Voltage , kV rms
8.25.3
Rated Voltage of Arrestor, kV rms
8.25.4
Continuous operating voltage , kV rms
8.25.5
Maximum Continuous operating voltage,
8.24.7
kV rms 8.25.6
Nominal Discharge Current, kA peak
8.25.7
Energy Absorption Capability, kJ/kV
8.25.8
Creepage factor
8.25.9
Reference std
8.26.0 8.26.1 8.26.2 8.26.3
WTI Scanner Details Make Model no. Manual submitted
8.27 8.27.1 8.27.2 8.27.3 8.27.4
Tests as per the spec. All in process tests confirmed (Yes/ No) All Type Tests confirmed (Yes / No) All Routine Tests confirmed (Yes/ No) All Special Tests confirmed (Yes/ No)
Yes
___________________________________________________________________________________________ Page 48 of 54
SP-EPSX-01-R2 9.0
Low voltage bus bar system
9.1 9.2 9.3 9.4 9.5
Bus bar material tinned copper Bus bar size Bus bar continuous current rating Bus bar insulator voltage class Bus bar droppers size from ACB to MCCB Maximum bus bar temperature rise Size of tinned copper MCCB spreaders
9.6 9.7
10.0 10.1 10.2 10.3 10.4 10.5.1 10.5.2 10.5.3 10.6.1 10.6.2 10.6.3 10.7.1 10.7.2 10.7.3 10.8
10.9 10.9. 10.9.1 10.9.2 10.9.3 10.9.4 10.9.5
10.9.6 10.9.7
ACB ACB make ACB rated voltage 415v +/- 10% ACB 3 pole with isolable neutral link ACB continuous current capacity at 415v 50Hz, at 50 deg C ACB short circuit breaking capacity Ics =Icu = 50kA minimum ACB SC making current capacity 100kAp ACB short time current withstand capacity for 1 sec (Icw= 50kA) ACB rated impulse withstand voltage for main & aux circuit in kv ACB closing time in ms ACB opening time in ms Guaranteed number of close & open operations at no load Guaranteed number of close & open operations at rated load ACB dimensions ACB operating mechanism -Trip free, anti pumping type, manual as well as motor Spring charging motor supply Close & trip coil supply ACB utilization category -B as per IS ACB indications - ON, OFF & TRIP ACB operation - manual - ON, OFF by push buttons ACB operation – electrical - ON, OFF by TNC switch ACB overload, short circuit & earth fault protection - By static or micro processor based releases Inbuilt CT burden, ration & class Overload release setting range
To connect transformer LV side to ACB & to MCCB Yes / No sqmm Amp kV
As per IS 13947
Yes / No Amp kA kA peak kA
Yes / No
volt volt
___________________________________________________________________________________________ Page 49 of 54
SP-EPSX-01-R2 10.9.8 10.9.9
Short circuit release setting range Earth fault release setting range
11.0 11.1 11.2 11.3
MCCB make MCCB type -3 pole, one break / pole MCCB - On & OFF by Manual handle MCCB Neutral connection - Fully isolable link sized for rated current MCCB rated voltage 415v +/- 10% at 50Hz MCCB rated continuous current 400 Amp
11.4 11.5
11.6 11.7 11.8 11.9 11.10 11.11 11.12 11.13 11.14 11.15 11.16 11.17
12.0 12.1 12.2 12.3 12.4 12.5 12.6 12.7 12.8
a) At 40 deg.C ambient b) At 50 Deg.C ambient MCCB 3 ph short circuit breaking capacity Ics = Icu =35kA MCCB 3 ph short circuit withstand capacity, Icw =8kA for 1 sec MCCB SC making current capacity MCCB rated insulation level MCCB mechanical & electrical endurance as per IS 13947 / IEC MCCB category of duty - B as per IS / IEC 947 MCCB indications -ON, OFF & TR MCCB protection - Thermal magnetic release + earth fault Connection to ACB main bus by Cu bar with double PVC insulation For 400 amp MCCB – -----mm For 630 amp MCCB – -----mm Connection to outgoing cables by bus bar terminals suitable for 4c300sqmm AYFY 1100 volt grade cable APFC system Rating of APFC system – 300 / 200 KVAR? Rated voltage & frequency Rated line current of APFC system Rated capacitance Capacitor steps – 6x50KVAR / 8X25 KVAR? Rated current of each 50KVAR/25 KVAR unit Rated capacitance – 50KVAR / 25 KVAR unit Three phase connection – star / delta
Yes / No Yes / No
630 Amp
Yes / No
Yes / No
Volts at 50Hz Amp micro Farad
Yes / No micro Farad
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SP-EPSX-01-R2 12.9 12.10 12.11 12.12 12.13 12.14 12.15 12.16 12.17 12.18 12.19 12.20 12.21 12.22 12.23 12.24 12.25 12.26
12.27 12.28 12.29 12.30
12.31 12.32 12.33 12.34 12.35 12.36 12.37 12.38
12.39 12.40 12.41 12.42
Capacitor dielectric type – No of series group / capacitor unit No. of parallel elements / series group Thickness of PP film in micron Thickness of Al foil in micron No. of PP film layers Maximum voltage stress per each PP film layer Discharge device material Capacitor tank steel thickness Capacitor unit dimension (L x D x H) APFC dimensions in mm (L x D x H) APFC system weight in kg Heat generated by APFC in Kw with all capacitor steps ON Operation with over voltage 115% of rated voltage for 12 hours in a day Operation with harmonic distortion THD 5% voltage & current Maximum permissible over current of 1.3 times rated current continuous Dielectric loss less than 0.2w / KVAR Guaranteed minimum capacitor switching operations (ON/OFF) per year Maximum temperature rise above ambient of 45 Deg C Residual voltage after deenergiszation & at 60 seconds Design life of capacitor unit APFC panel insulation level 1 minute power frequency withstand Impulse withstand voltage Main bus bar material / size (sqmm) Main bus bar rated current Main bus bar short time withstand CT make & accuracy class CT ratio & burden (VA) APFC relay make / type APFC relay catalogue enclosed? Data logger make / type, shall have RS 485 port on open modbus or else for data transmission. Data logger catalogue enclosed? AC contactor make AC contactor rating AC contactor utilization category as per IS
APP / MPP
mm
Deg C
KV KVp
Yes / No
Yes / No Amp
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SP-EPSX-01-R2 12.43 12.44 12.45 12.46 12.47
13.0 13.1 13.2
13.3
13.4 13.5
13.6
13.7 13.8
13.9 13.10
13.11
13.12
13.13
13.14
100amp MCCB make 100amp MCCB current breaking capacity Ics=Icu=35kA Copper wire size from MCCB to contactor & capacitor – 35sqmm Cu Energy meter box as per specification provided? MFM
Enclosure for package substation Service conditions for outdoor use Material for enclosure – Galvanized sheet steel 2mm thick CRCA for all side doors, covers Enclosure construction - Frame supported construction with all doors, covers welded with steel channel ribs at every 1000mm minimum Lifting lugs for site handling / lifting by crane - qnty Doors for RMU compartment & LV compartment with anti theft hinge minimum 3 nos., with lockable handle & with padlocking facility Two side covers for transformer compartment bolted with Allen head type bolts to main frame Top & other side walls of enclosure welded sheet metal Removable canopy above top cover -min 2 mm thick galvanized sheet metal with 10º slope Enclosure integral steel base frame ‘I’ section size Base frame bottom support pads for fixing by bolt to foundation - minimum six numbers to rest on foundation Enclosure compartments -separate compartments for RMU, transformer & LV switchgear/APFC Separation between RMU & transformer compartment by sheet steel 2 mm thick Separation between transformer compartment & LV compartment by sheet steel 2 mm thick Degree of ingress protection against
Yes / No Each LT feeder and incomer shall be provided with Multi functional meter of accuracy class 0.5 with RS 485 port for Remote interface. Yes / No Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
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SP-EPSX-01-R2
A B C 13.15
13.16 13.18
13.19
13.20 13.21 13.22 14.0 14.1
14.2 14.3 14.4
14.5
14.6 14.7
solids & water as per IS12063 IP53 for RMU compartment IP23 for transformer compartment IP33 for LV compartment Louvers on side covers of transformer compartment & side walls of LV compartment with steel wire mesh welded from inside so as to meet IP requirement as above Louver area on cover / side wall 1500mm height x 1500mm minimum Gland plate for RMU compartment 3mm thick MS plate (split type in two parts) suitable for 3x3c300sqmm AYFY 11kv cable Gland plate for LV compartment – 3 mm thick MS plate (Split type) suitable for 8x4c300sqmm cable + 10x7c2.5sqmm cable Class of enclosure as per IEC 62271202 = 10K Overall dimensions of package substation (LxWxH) Overall weight of package substation Enclosure earthing & illumination Two earth bus connection brought out of package substation enclosure to earth pad for connection to earth pit -Two earth pads for RMU, transformer & LV compartment each -Two earth pads for transformer neutral Main earth bus material and size Earth bus fault current capacity 26.3 kA for 3 sec Earth connection of all covers, doors & structural parts to GI bus by metallic jumper connection Earth connection of RMU, ACB & transformer body parts to GI bus by two numbers of 50x6mm GI flat per equipment Earth bus identification shown by letter ‘E’ RMU, transformer & LV Compartment illumination by 36w CFL fixture controlled through
Yes / No
Yes / No In mm Kg
Yes / No
Yes / No
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SP-EPSX-01-R2
14.8
14.9 14.10 14.11 14.12 15.0
16.0 17.0 18.0
SPMCB, door limit switch and OFFON switch (to be connected parallel with door limit switch). RMU, transformer & LV compartment power socket - 5/15amp 3 pin socket controlled through 15 amp SPMCB Paint shade external for enclosure Paint shade internal for enclosure Paint material & thickness Name plate & labels as per specification provided? Type test report submitted with GTP for RMU, transformer, ACB, MCCB, APFC system? GA drawing of package substation submitted with GTP? Bill of material submitted with GTP? Clause wise deviation to technical specification submitted?
Yes / No Yes / No
Yes / No Yes / No Yes / No
Name, Address & contact details of Vendor -
_______________________________
Vendor contact person & signature
_______________________________
-
___________________________________________________________________________________________ Page 54 of 54
