51TMSS01R0

TRANSMISSION MATERIALS MATERIA LS STANDARD STANDA RD SPECIFICATION

51-TMSS-01, Rev. 0

TABLE OF CONTENTS

1.0

SCOPE

2.0

CROSS REFERENCES

3.0

APPLICABLE CODES AND STANDARDS

4.0

DESIGN AND CONSTRUCTION REQUIREMENTS 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 4.12 4.13 4.14 4.15 4.16 4.17 4.18

General Performance Characteristics and Ratings Construction Tap Changer Bushings and Terminations Cable Boxes Oil Temperature Indicator Oil Level Indicator Nitrogen Pressure Gauge Pressure Relief Device Valves Gaskets Transformer Oil Grounding Lifting Facilities Nameplate Warning Signs Tools

5.0

PACKING AND SHIPPING

6.0

TESTS 6.1 6.2 6.3 6.4 6.5 6.6

7.0

51TMSS01R0/AMZ

Type (Design) Tests Routine (Production) Tests Special Tests Bushings Off Circuit Tap Changer Accessories Tests

DATA SCHEDULE

Date of Approval: March 18, 2006

PAGE NO. 2 OF 21

TRANSMISSION MATERIALS STANDARD SPECIFICATION

1.0

51-TMSS-01, Rev. 0

SCOPE This SEC Transmission Material Standard Specification (TMSS) specifies the minimum technical requirements for design, engineering, manufacture, inspection, testing and performance of pad- mounted station service transformer up to 2 MVA, intended to be used in the system of the Saudi Electricity Company, Saudi Arabia.

2.0

CROSS REFERENCES This Material Standard Specification shall always be read in conjunction with SEC General Specification No. 01-TMSS-01, titled "General Requirements for All Equipment/Materials", which shall be considered as an integral part of this TMSS. This TMSS shall also be read in conjunction with SEC Purchase Order or Contract Schedules for project, as applicable.

3.0

APPLICABLE CODES AND STANDARDS The latest revision/amendments of the following Codes and Standards shall be applicable for the equipment/material covered in this TMSS. In case of conflict, the vendor/manufacturer may propose equipment/material conforming to one group of Industry Codes and Standards quoted hereunder without jeopardizing the requirements of this TMSS. 3.1

IEC 60076

Power Transformers.

3.2

IEC 60214

Tap-changers.

3.3

IEC 60616

Terminal and Tapping Markings for Power Transformers.

3.4

IEC 60137

Insulated Bushing For Alternating Voltages above 1000V.

3.5

IEC 60437

Radio Interference Test on High Voltage Insulators.

3.6

IEC 60354

Loading guide for oil-immersed power transformers.

3.7

IEC 60529

Degrees of protection provided by enclosures (IP Code)

3.8

NEMA-TR-1

Transformers, Regulators and Reactors.

3.9

IEEE Std C57.12.00

IEEE Standard General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers.

3.10 IEEE Std C57.12.90

IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers.

3.11 IEEE Std C57.91

IEEE Guide for Loading Minera l Oil-Immersed Transformers.

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51-TMSS-01, Rev. 0


4.0

3.12 IEEE Std C57.12.70

IEEE Standard Terminal Markings and Connections for Distribution and Power Transformers.

3.13 IEEE C57.19.01

Performance Characteristics and Dimensions for Outdoor Apparatus Bushings.

3.14 IEEE 386

Separable Insulated Connector Systems for Power Distribution Systems Above 600 V.

3.15 ANSI/NFPA 70

National Electrical Code.

3.16 SASO/SSA 421

Testing Methods of Power Transformers.

3.17 SASO/SSA 422

Power Transformers.

3.18 54-TMSS-01

Mineral Insulating Oil for Electrical Apparatus.

DESIGN AND CONSTRUCTION REQUIREMENTS 4.1

4.2

General 4.1.1

The design requirements of the pad-mounted station service transformer shall generally conform to this TMSS.

4.1.2

The transformer shall be outdoor type suitable for mentioned in 01-TMSS-01.

4.1.3

The transformer shall be core type having two separate windings per phase immersed in mineral oil with end bushings in enclosure boxes.

4.1.4

The transformer shall be self-cooled with radiators (method fo cooling is ONAN).

4.1.5

The transformer shall be provided with all required accessories as specified.

the service conditions

Performance Characteristics and Ratings 4.2.1

Each transformer shall be rated to supply full station A.C. loads with one of these rating: 300, 400, 500, 750, 1000, 1500 or 2000 kVA as specified in the data schedule.

4.2.2

The transformer primary voltage at principal tap shall be 34,500 or 33,000 or 13800 V as specified in the data schedule.

4.2.3

The transformer secondary voltage at no load shall be 400/231 , 380/220 or 231/133 V as specified in the data schedule.

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51-TMSS-01, Rev. 0

4.2.4

The transformer shall be 3 phase, 60Hz, Delta Star connected with vector group Dyn11 or Dyn5 as specified in the data schedule.

4.2.5

The transformer shall be capable of carrying continuously the rated power under conditions listed in 01-TMSS-01 at all taps without exceeding the specified temperature-rise limitations.

4.2.6

The transformer shall be designed and constructed to withstand at any tap without damage, the thermal and mechanical effects of short-circuit in accordance with IEC 60076 or IEEE Std C57.12.00.

4.2.7

The bushings, tap-changer and other auxiliary equipment shall be selected to work under conditions listed in 01-TMSS-01 and so as not to restrict the loading capability of the transformer.

4.2.8

If the measured transformer losses as tested exceed the guaranteed values, the lump sum contract/transformer price will be reduced for each kW increase & adjusted as per contractual terms and conditions applicable for transformer. When the actual total losses exceeds the tolerance specified in IEC 60076-1 or IEEE Std C57.12.00, SEC shall have the right to reject the transformer.

4.2.9

At maximum current tap (normally the tapping with highest load loss), the top oil temperature-rise and the average windings temperature-rise shall not exceed the values mentioned in the data schedule.

4.2.10 Transformer shall be designed to meet the overloading requirements of the relevant IEC 60354 or IEEE Std C57. 91 standards adjusted to ambient conditions specified in 01-TMSS-01. 4.2.11 The required value of short-circuit impedance at rated current (principal tapping) of transformers shall as specified in the data schedule. 4.2.12 Transformer shall have a minimum efficiency of 98% at full load at all taps. 4.2.13 Noise level shall be measured in accorance with IEC 60076 or ANSI C57.12.90. Noise level, shall be specified in the data schedule & not exceed the limits specified in NEMA TR-1. 4.2.14 Ratings and requirements shall be as specified in Data Schedule. 4.3

Construction 4.3.1 Tank a.

51TMSS01R0/AMZ

Transformer tank shall be of rigid or non-rigid, sealed type for transformers rated 500 kVA and below. For transformers above 500KVA and below 1000KVA, the tank shall be rigid, sealed or conservator type. Transformer of rating 1000KVA and above, tank shall be rigid with conservator & buchholz relay. Date of Approval: March 18, 2006

PAGE NO. 5 OF 21


4.3.2

4.3.3

51TMSS01R0/AMZ

51-TMSS-01, Rev. 0

b.

Oil level inside the transformer tank shall remain above all vital components such as core, coil, bus leads etc. for a 10 degree tilt in any direction from the normal leveled position.

c.

The tank shall be made of formed and electrically welded steel-alloy plates, suitably braced to provide sufficient strength for supporting internal parts and to prevent damage or distortion under service conditions or during transport or when the complete transformer assembly filled with oil is lifted by crane or jacks.

d.

The tank shall be designed to withstand without leakage or permanent deformation an internal pressure of 25% above the normal operating pressure for a period of 24 hours.

e.

Rigid type tank shall be designed to withstand a full vacuum without permanent deformation for 30 minutes.

f.

Transformer with rigid sealed tank shall have a nitrogen cushion on top of oil.

g.

The transformer tank shall not leak and shall remain effectively sealed for top oil temperature up to 110°C. All pipes and radiators, which are welded to the tank wall shall be welded externally.

h.

Core and coil assembly shall not be an integral part of the main cover.

i.

The tank cover shall be welded type. The gasket/bolted cover shall not be acceptable.

Base a.

The base of the transformer shall be rigidly welded steel frame adequate to withstand moving, skidding, shipping, handling and supporting the weight of the transformer on a concrete foundation when in service.

b.

Base structural members shall be so located that the center of gravity shall not fall outside the points of support for a 15 degree tilt from the normal leveled position, with or without oil in the transformer.

Conservator tank a

The transformer shall have a detachable oil conservater tank of suitable capacity to allow for expansion of total oil volume for all loading/temperature conditions of transformer.

b.

The conservator shall be equipped with an oil level gauge mentioned in this specification clearly and easily legible showing complete level range.


PAGE NO. 6 OF 21


c.

The following shall be provided : i.

ii. iii.

iv.

4.3.4

51-TMSS-01, Rev. 0

A double float Buchholz relay with isolating valve, in the oil feed from conservator to main tank for transformers with rating of 1MVA & above. Oil valves for filling and draining the conservator. The valves shall be located so as to be accessible from ground level. A silica-gel breather connected to air space above oil level. The breather shall be accessible for maintenance from ground level. The color of the silica-gel shall be either blue or orange. A low oil level alarm contact. This may be incorporated into a combined magnetic oil level indicator / monitor.

Radiators a.

The radiator, which is not a part of the tank (corrugated tank form), shall be externally welded into the tank wall and the joints shall be made oil tight. It shall be stiffened to prevent vibration with transformer in service.

b.

The design of the radiators shall be such that dust and sand shall not accumulate and block or restrict circulation of the air.

c.

The radiators shall withstand the pressure condition specified for the tank.

4.3.5 Windings

4.3.6

a.

Windings material shall be electrolytic copper grade which has been machine scoured to remove microscopic burrs before insulation is applied.

b

The windings shall be fully (uniform) insulated. The minimum winding insulation requirements shall be as per 01-TMSS-01.

Core Core of the transformer shall be of high grade, cold rolled grain oriented silicon steel with low carbon content and be virtually non-ageing over the expected life of the transformer. Each lamination shall be covered with an insulating film immune to hot oil.

4.4

Tap Changer 4.4.1

The transformer shall be equipped with externally operated, 5 position, off circuit tap changer located in the high voltage windings.

4.4.2

Tapping range of the tap changer shall be ±5% in equal steps of 2.5%.

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4.5

51-TMSS-01, Rev. 0

4.4.3

The off circuit tap changer shall be operated manually from outside. The operating handle shall be accessible from ground level.

4.4.4

The tap changer should be operated only when the transformer is de-energized.

4.4.5

The tap changer shall have provision for pad locking at every tap position. The operating mechanism shall ensure that the tap changer can be locked only if that tap switch is making full contact. A locking facility shall be provided on the tap changer. This shall be capable of accepting a lock having a 6 mm shackle with 25 mm clearance. A tap position indicator, with numbers easily legible from the operating position shall be provided. Tap position 1 shall refer to position of highest primary voltage.

Bushings and Terminations 4.5.1

Primary and secondary bushings shall be side wall mounted opposite to each other. Steel fittings shall be as per 01-TMSS-01. Terminals shall be suitable for vertical cable take-off.

4.5.2

Unless specified in the data schedule, primary bushings shall be marked & arranged to be 1U, 1V, 1W form right to left when facing HV side. Secondary bushings shall be marked & arranged to be 2U, 2V, 2W form left to right when facing LV side. LV neutral shall be marked to be 2N.

4.5.3

Transformers shall be equipped with bushings with an insulation level not less than that of the winding terminal to which they are connected.

4.5.4

Bushings for use in transformers shall have insulation levels and creepage distance as per 01-TMSS-01.

4.5.5. All bushings shall be removable without removing the transformer tank cover. 4.5.6

Bushings shall be of electrical grade wet processed porcelain, brown colored in accordance with IEC 60137 unless specified that the HV bushings to be of Dead-break separable insulated connector system type per IEEE Std. 386 and suitable for single core and three core cable terminations, with provision for suitable parking stand. For such a system, the requirements of creepage distance as specified in 01-TMSS-01 would not be applicable.

4.5.7

The neutral bushing shall be fully insulated and inter-changeable with the associated phase bushings.

4.5.8

Primary & secondary bushings terminal pads shall be of tinned copper suitable for bolted type terminal connectors. Cables sizes shall be as specified in Data Schedule.

4.5.9

Equipped with a fully insulated secondary neutral bushing (externally groundable) to permit the use of a neutral conductor or current transformer or sensing ground fault currents.

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4.6

51-TMSS-01, Rev. 0

Cable Boxes HV and LV bushings and terminations shall be enclosed in adequately sized cable terminal boxes bolted to the main tank. Cable terminal boxes shall be made of sheet steel of thickness at least 3mm and of degree of protection as specified in 01-TMSS-01 per IEC 60529. Cable terminal boxes shall be designed for bottom entry.

4.7

4.8

4.9

Oil Temperature Indicator 4.7.1

Transformer shall be provided with a dial-type thermometer mounted in a suitable place. The thermometer shall be direct-stem mounted in a closed well at a suitable level to indicate the top oil temperature.

4.7.2

The indicator shall have a dark face dial with light markings and a light colored indicating pointer, and an orange-red maximum indicating pointer with provisions for hand resetting. The dial marking shall cover a range of 0 to 120°C.

4.7.3

The words "Oil Temperature" shall be marked on the dial. or on a suitable nameplate mounted adjacent to the indicator.

Oil Level Indicator 4.8.1

A magnetic type oil level indicator shall be provided to indicate oil level in the tank.

4.8.2

The indicator shall have a dark face dial with light markings and a light colored indicating pointer. The dial markings shall show 25°C level as well as the maximum and minimum oil levels.

4.8.3

The words "Oil Level" shall be marked on the dial or on a suitable nameplate mounted adjacent to the indicator.

Nitrogen Pressure Gauge 4.9.1

For rigid sealed type transformers, a pressure gauge shall be provided to monitor the pressure of the nitrogen inside the tank.

4.9.2

The gauge shall have a dark face dial with light markings and a light colored indicating hand.

4.10 Pressure Relief Device A mechanical self- resetting type pressure relief device shall be provided for rapid release of any over pressure within the transformer. The device shall operate at a pressure less than the designed withstand pressure of the tank.

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51-TMSS-01, Rev. 0

4.11 Valves 4.11.1 The transformer shall be fitted with the following valves: a.

One drain valve shall be located so that the tank can be completely drained. The size of the valve shall be 20mm diameter. This valve can be used as a lower-filter valve.

b.

One sampling valve shall be located at the tank bottom. The size of the valve shall be 5mm diameter. The sampling valve may be integrated with the drain valve. This valve shall have male thread and be equipped with a cap.

c.

One Upper-filter valve, if specified in Data Schedule, shall be of 20mm diameter and shall be located at the top of the tank.

4.11.2 All valves shall be of iron body with bronze or stainless steel trim. Means shall be provided for locking the valves. Each valve shall be provided with an indicator clearly showing its position. 4.11.3 All valves shall be of petcock type with dust cover. The valves shall be readily accessible with the transformer in service. 4.11.4 The oil drain and filter valves, each, shall be provided with the following connection fittings: a.

Coupler brass 1-1/2" N.P.T., female thread connection, rated 300 PSI.

b.

Brass Dust plug for coupler with retention chain, size 1-1/2" N.P.T., plug connection rated 300 PSI.

4.12 Gaskets All gaskets used shall be gas and oil tight throughout the service life of the transformer at the specified service condition. Gaskets shall be reusable with means to provide controlled compression. 4.13 Transformer Oil The transformer shall be filled with mineral insulating oil, which shall conform to 54TMSS-01. 4.14 Grounding 4.14.1 Transformer shall be provided with grounding provisions near the base on two diagonally opposite sides.

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51-TMSS-01, Rev. 0

4.14.2 Grounding connectors shall be of solderless type and shall be suitable to accommodate bare copper ground conductor of sizes 1 x 240 mm² for station fault level up to 40 kA and 2 x 240 mm² for station fault level above 40 kA. 4.14.3 The transformer core shall be grounded to the transformer tank at one point. 4.15 Lifting Facilities Lifting lugs for balanced lifting of the completely assembled transformer shall be provided. The bearing surface of the lifting lugs shall be free from sharp edges and each lifting lug shall be provided with a hole having a minimum diameter of 20mm for guying purposes. Means shall be provided for lifting the core and coil assembly from the tank. Lifting eyes shall be provided for lifting the main cover. 4.16 Nameplate 4.16.1 The transformer shall bear a nameplate permanently and legibly marked in English per IEC 60076-1 along with the following additional information: a.

SEC Purchase Order No. or Contract No. or J.O. No.

b.

51-TMSS-01, Rev. 0

c.

Volume of oil (liters)

d.

Maximum withstands operating pressure of the tank and conservator.

e.

Vacuum withstands capability of the tank.

4.16.2 The nameplate material shall be stainless steel and shall be firmly affixed to tank by stainless steel screws or rivets. 4.17 Warning Signs 4.17.1 High-voltage warning signs, both in English and Arabic, shall be permanently attached on the HV cable box with the legend "DANGER HIGH VOLTAGE" &" ". 4.17.2 Tap changer opertion warning signs shall be permanently attached to side of off tap changer with the legend "DE-ENERGIZE THE TRANSFORMER BEFORE OPERATING THE TAP CHANGER". 4.17.3 Any other information which the Manufacturer deems necessary for proper installation, maintenance and operation of the transformer.

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51-TMSS-01, Rev. 0

4.18 Tools The Manufacturer shall provide the special tools that are necessary for maintenance or installation of the transformer. Installation, operation and maintenance manual with a list of recommended spare parts and shall be provided.

5.0

PACKING AND SHIPPING Packing and shipping shall meet the requirements laid down in 01-TMSS-01.

6.0

TESTS All test results shall be provided for review and acceptance by SEC. 6.1

Type (Design) Tests All type (design) tests prescribed in IEC 60076 standard or IEEE Std C57.12.90 shall be performed on a representative unit or on the first unit of every new design or rating to be supplied to SEC. In lieu of the actual type (design) tests, certified test reports of type (design) tests performed on an identical unit may be submitted to SEC for review and approval during bidding stage.

6.2

Routine (Production) Tests All routine (production) tests prescribed in the IEC 60076 standard or IEEE Std C57.12.90 shall be performed on all units prior to delivery to SEC.

6.3

Special Tests 6.3.1

Winding & core insulation resistance test shall be carried out on all transformers.

6.3.2

Insulation power factor measur ement shall be carried out on all transformers.

6.3.3

Leakage test shall be carried out on all transformers.

6.3.4

The following special tests shall be carried out on one representative transformer, if specified in Data Schedule:

51TMSS01R0/AMZ

a.

Measurement of zero sequence impedances.

b.

Measurement of acoustic sound level.


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6.4

6.5

6.6

51-TMSS-01, Rev. 0

Bushings 6.4.1

All routine tests shall be performed on all HV, LV and neutral bushings per IEC 60137 unless specified that the HV bushings to be teste d per IEEE 386.

6.4.2

Type tests shall be done on a representative unit of each new design or rating. certified test reports of type (design) tests performed on an identical unit may be submitted to SEC for review and approval during bidding stage.

Off Circuit Tap Changer 6.5.1

All routine tests shall be performed on per IEC 60214.

6.5.2

Type tests shall be done on a representative unit of each new design or rating. certified test reports of type (design) tests performed on an identical unit may be submitted to SEC for review and approval during bidding stage.

Accessories Tests Test certificates of all transformers accessories from their origin manufacturer shall be certified by the transformer manufacturer.

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51-TMSS-01, Rev. 0


7.0

DATA SCHEDULE

PAD-MOUNTED STATION SERVICE TRANSFORMER UP TO 2.0 MVA.

SEC Enquiry No.

Date:

SEC Purchase Order No. or Contract No.

Date:

SEC PTS No./Project Title with J.O. No. REFERENCE SECTION NO. 3.0

DESCRIPTION

'A'

'B'

'C'

APPLICABLE CODES AND STANDARDS Applicable Industry Standards

*

4.0

DESIGN AND CONSTRUCTION REQUIREMENTS

4.1

General: Model Designation Estimated transformer life to operate under sevice conditons (year) Type of system grounding (solidly grounded, resistance grounding, other)

4.2

* *

Performance Characteristics and Ratings: Rated power (kVA) Vector group designation (Dyn11 or Dyn5) Primary voltage (V) (13800, 33000 or 34000) Secondary voltage (V) (400/231, 380/220 or 231/133)

'A''B''C'(*)-

SEC SPECIFIED DATA/PARAMETER. BIDDER/SUPPLIER/VENDOR/CONTRACTOR PROPOSED DATA/PARAMETERS. REMARKS SUPPORTING THE PROPOSED DEVIATION IN COLUMN 'B'. DATA/PARAMETER TO BE PROVIDED/PROPOSED BY THE BIDDER/SUPPLIER/ VENDOR/CONTRACTOR IN COLUMN 'B'.

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51-TMSS-01, Rev. 0


7.0

DATA SCHEDULE

PAD-MOUNTED STATION SERVICE TRANSFORMER UP TO 2.0 MVA. REFERENCE SECTION NO. 4.2 Continued

DESCRIPTION

'A'

'B'

'C'

Basic impulse withstand voltage (BIL) HV winding (kVpeak) LV winding (kVpeak) Power frequency withstand voltage HV winding (kVrms) LV winding (kVrms) Guaranteed no-load losses at rated voltage, (kW)

*

Guaranteed load losses at rated voltage & 75 oC (kW)

*

Guaranteed impedance voltage at rated voltage & 75ºC (%) Guaranteed excitation current at rated voltage excited from secondary side (A)

*

Efficiency (%) Voltage regulation at normal tap and 0.8 p.f (%) Guaranteed top oil temperature rise at highest total load losses (K) above the maximum ambient temperature Guaranteed average windings temperature-rise at highest total load losses (K) above the maximum ambient temperature Hot spot temperature-rise (K) Short circuit withstand level (KA)/sec 51TMSS01R0/AMZ


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51-TMSS-01, Rev. 0


7.0

DATA SCHEDULE


DESCRIPTION Maximum design flux density @ 100% of rated voltage (Tesla)

'A'

'B'

'C'

*

Noise level (dBA) 4.3

Construction: Tank: Material Tank (rigid/non-rigid) Tank (sealed /conservator) Thickness of tank (mm) Normal operating pressure of tank (kpa) Maximum pressure withstand without permanent deformation of tank & radiator for 24 hours (kpa) Minimum pressure (vacuum) withstand without permanent deformation of rigid body tank for 30 minutes (kpa)

* * * * *

*

*

Winding: Material Core: Material 4.4

Off-Load Tap Changer: Applied standard Number of steps Step voltage (%) Voltage tapping range (%) Operating method Tap position of maximum primary voltage

4.5

Bushings and Terminations: Opposite side wall mounted

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51-TMSS-01, Rev. 0


7.0

DATA SCHEDULE


DESCRIPTION

'A'

'B'

'C'

Vertical/horizontal mounted Marking & arranged of HV side Marking & arranged of LV side Primary (HV)Bushings: Applied standard Manufacturer Origin Type (model) Material Color Rated voltage (V) Rated maximum voltage (V) BIL (kVpeak) Dry power-frequency voltage withstand voltage (kVrms) Rated current (A) Creepage distance (mm) Cantilever strength (kN) Primary Bushing Terminal Pad: Size Material Primary Cable: Type Size (mm2) Conductor material Number of core per cable Number of cable per phase Termination method Secondary (LV) Bushings: Applied standard Manufacturer Origin Type (model) Material Color Rated voltage (V) Rated maximum voltage (V)

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51-TMSS-01, Rev. 0


7.0

DATA SCHEDULE

PAD-MOUNTED STATION SERVICE TRANSFORMER UP TO 2.0 MVA. REFERENCE SECTION NO.

DESCRIPTION

'A'

'B'

'C'

BIL (kVpeak) Dry power-frequency voltage withstand voltage (kVrms) Creepage distance (mm) Cantilever strength (kN) Rated current (A) Secondary (LV) Bushing Terminal Pad: Type Size Material Secondary Cable: Type Size (mm2) Conductor material Number of core per cable Number of cable per phase Termination method 4.6

Cable Boxes: Material type Thickness (mm) Degree of protection, IP Size of primary (HV) cable box size (HXWXD) in mm Size of primary (LV) cable box size (HXWXD) in mm

4.7

Oil Temperature Indicator: Manufacturer Origin Type (model) Type of liquid sensing element Provision of max. indicator Diameter (mm) Protection degree, IP Scale range

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51-TMSS-01, Rev. 0


7.0

DATA SCHEDULE

PAD-MOUNTED STATION SERVICE TRANSFORMER UP TO 2.0 MVA. REFERENCE SECTION NO. 4.8

DESCRIPTION

'A'

'B'

'C'

Oil Level Indicator: Manufacturer Origin Type (model) Diameter (mm) Protection degree, IP Scale range

4.9

Nitrogen Pressure Gauge: Manufacturer Origin Type (model) Diameter (mm) Protection degree, IP Scale range (kpa)

4.10

Pressure Relief Device: Manufacturer Origin Type (model) Scale range of operation (kpa) Resealing pressure (kpa)

4.11

Valves: Type of valves Material of valves Diameter size of the drain valve (mm) Diameter size of the sampling valve (mm) Sampling valve integrated with the drain valve Diameter size of the filter valve, if required (mm)

4.12

Gaskets: Material Thickness (mm)

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51-TMSS-01, Rev. 0


7.0

DATA SCHEDULE

PAD-MOUNTED STATION SERVICE TRANSFORMER UP TO 2.0 MVA. REFERENCE SECTION NO. 4.13

DESCRIPTION

'A'

'B'

'C'

Transformer Oil: Fill-in & attach column “B” of Data schedule of 54-TMSS-01

4.15

Lifting Facilities Over all dimension of the assembled transformer (mm) - height - width - length Masses (kg) - core & winding - tank without oil - oil - total weight Volume of oil (liter)

6.0

51TMSS01R0/AMZ

TESTS List of special tests, if required


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51-TMSS-01, Rev. 0


6.0

DATA SCHEDULE

PAD-MOUNTED STATION SERVICE TRANSFORMER UP TO 2.0 MVA.

A.

ADDITIONAL TECHNICAL INFORMATION OR FEATURES TO BE FURNISHED BY SEC:

B.

ADDITIONAL SUPPLEMENTARY DATA BIDDER/VENDOR/SUPPLIER/CONTRACTOR:

C.

OTHER PARTICULARS CONTRACTOR:

TO

BE

FILLED

OR

UP

FEATURES

BY

Actual Manufacturer of Equipment/Material

PROPOSED

BY

BIDDER/VENDOR/SUPPLIER/

Vendor/Supplier/ Contractor

Name of the Company Location and address

Name and Signature of Authorized Representative and Date Official Seal/Stamp of the Company & Date

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51TMSS01R0

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