12.5/16 MVA Power Transformer Data sheetFull description
Siemens Dry transformer
DRY
Current TransformerFull description
dry trafo
Short Circuit Calculation with MVA Method and compare with ETAP 7.00
Descripción completa
Descripción completa
fault caculation
Full description
transformer
Descripción: power transformer
Transformer
transformerFull description
dry socket
a treatise on the practice of dry fastingFull description
Full description
Dry SocketDeskripsi lengkap
Full description
Project : 2X135 TPP at Meenakshi Energy
Package: LV Auxiliary Transformer
Bidder’s Name: Voltamp Transformers Ltd.
Schedule K TECHNICAL PARTICULARS FOR DRY TYPE POWER TRANSFORMERS Revision – “2” A. DRY TYPE POWER TRANSFORMERS 1.0 1.1 1.2 1.3
General Make Type Number Number of Windings Windin gs per phase
: : : :
1.4 1.5
Number Number of Phases Service / Duty
:
Three Indoor / Continuous
1.6
Reference Standard
:
IS : 11171
2.0
Rating
:
2.1
Type of Cooling
:
AN
2.2 2.3
Rated Output Rated Voltage (No-Load) H.V.
MVA : kV :
1.6
2.4
L.V. Rated Current
Voltamp Transformers Transformers Ltd. Cast Resin Encapsulated Dry Two
6.6 (+/-10%)
:
0.433
: :
139.96 2133.40
A
H.V. L.V. 2.5
Rated Frequency
2.6
Connection H.V.
:
Delta
L.V.
:
Star
Vector Group Reference Voltage withstand Time
:
Dyn11
a. 110% of rated voltage
:
Continuous
b. 125% of rated voltage
:
60 sec
c. 140% of rated voltage
:
5 sec
d. 150% of rated voltage
:
1 sec
2.7 2.8
2.9
Hz :
50 (+/-5%)
s
Overfluxing Overfluxing Capability a. For Overfluxing Factor
3.0
b. c. Temperature
3.1
Reference ambient temperature
1.1 : 1.25 : 1.4 : °C
Page 1 of 9
Continuous 60 sec 5 sec 50
Project : 2X135 TPP at Meenakshi Energy
3.2
Package: LV Auxiliary Transformer
Bidder’s Name: Voltamp Transformers Ltd.
3.4 4.0
Temperture rise over referene ambient Deg. C : a. Of winding by resistance b. Hot spot temperature limited in winding Maximum continuous over loading capacity of the transformer without exceeding the specified winding temperature Thermal time constant Tappings
4.1
Type
:
Off Circuit Tap Switch
4.2
Capacity
:
Full
4.3 4.4
Range - Steps x % variation Taps provided on HV/LV Winding
: :
+/-5% in steps of 2.5% HV side
5.0
Insulation Level
5.1
Separate source power frequency voltage withstand
3.3
5.2
5.3
6.0
6.1 6.2 6.3
:
70 135
:
As per IEC-905
°C °C
h
Approx. 45 min.
kV RMS
Winding
Bushing
H.V
:
20
28
L.V. L.V. Neutral (for bushing)
: :
3 3
3 3
Induced overvoltage withstand
Winding
kV RMS
H.V L.V. L.V. Neutral ( for bushing) Full wave lightning impulse withstand voltage H.V L.V. Impedance at Principal Tap at Rated Frequency and 75° C winding temperature with 100% rating Impedance at principal tap
: : :
Impedance at maximum voltage tap Impedance at minimum voltage tap
Page 2 of 9
}Twice the rated }voltage and }double }frequency Winding
kV Peak : : :
% :
Bushing
60 NA
Bushing
75 NA
% :
6.25% (without negative tolerance with +10% tol.) 6.70% (Approx.)
%
6.30% (Approx.)
Project : 2X135 TPP at Meenakshi Energy
6.4 6.5 6.6 6.7
7.0 7.1
7.2 7.3 8.0
8.1 8.2 8.3 8.4 8.4.1 9.0 9.1 9.2
Package: LV Auxiliary Transformer
Reactance at rated current for principal tap Resistance at 75°C. Zero Sequence Impedance at 75° C at principal tap. Capacitance of Windings a. H.V. - Earth b. L.V. - Earth c. H.V - L.V Guaranteed Losses at Principal Tap, Full Load and 75°C. No load losses at rated voltage and at rated frequency and without any +ve tolerances Load Losses at rated current without any +ve tolerances Total losses Efficiency at 75°C and 0.8 Power Factor Lag and at unity power factor At full load At 3/4 full load At 1/2 full load Maximum efficiency Load and Power Factor at which it occures Regulation at Full Load at 75°C At unity power factor At 0.8 power factor lagging
No Load Current referred to HV at rated frequency At 90% rated voltage At 100% rated voltage
A : A :
Approx. 1% of FLRC Approx. 2% of FLRC
10.3
At 110% rated voltage
A :
Approx. 3% of FLRC
11.0 11.1
Approximate Maximum Density At 90% rated voltage
11.2
At 100% rated voltage
10.0
Flux Wb / 2 m Wb / 2 m Page 3 of 9
:
1.485
:
1.65
Project : 2X135 TPP at Meenakshi Energy
Package: LV Auxiliary Transformer
11.3
At 110% rated voltage
12.0 12.1
Maximum Current Density H.V. Winding
12.2
L.V. Winding
12.3
: Maximum Current Density under short circuit H.V. Winding A/ : 2 cm L.V. Winding A/ : 2 cm Withstand Time without injury for Three phase dead short circuit at s : terminal with rated voltage maintained on the other side Single phase short-circuit at s : terminal with rated voltage maintained on other side Core Type - Core or shell :
12.3.1 12.3.2 13.0 13.1
13.2
14.0 14.1
Wb / 2 m
Bidder’s Name: Voltamp Transformers Ltd.
A/ 2 cm A/ 2 cm
:
1.815
: :
240
:
150
14.2
Core material
:
14.3
Thickness of lamination
mm :
14.4
Insulation of lamination
:
14.5
Equivalent cross-sectional area
14.6 14.7 15.0
Type of joint between core and yoke Percentage silicon content Coils
15.1
Type of Coil :
cm² :
3840 2400
3
3
Core CRGO silicon steel laminations 0.27 to 0.3 mm Carlite 520 cm² (Approx.) Mitred interleaved Approx. 4%
a. H.V
:
Layer
b. L.V.
:
Foil
15.2
Conductor Material
:
Electrolytic copper
15.3
Insulating Material : :
Super enamel coating DMD Paper Resin +Air
a. H.V - Turn b. L.V - Earth c. L.V. - Earth
: Page 4 of 9
Project : 2X135 TPP at Meenakshi Energy
Package: LV Auxiliary Transformer
d. H.V. - L.V.
Bidder’s Name: Voltamp Transformers Ltd.
:
DMD Paper+Resin+Air
15.4
Magnetising inrush current
A
Approx. 8 to 10 times of FLRC
15.5
Magnetising current at rated frequency and at rated voltage Conductor area approx
A
Approx. 2% of FLRC
15.6
HV
34.00
LV
1530.0
16.0
Off-circuit tap changer details
16.1 16.2
Make Type
16.3
Rated Voltage class of tap changer
16.4 16.5
Rated Current Auxiliary Power
16.6 16.7 16.8
Step voltage Number of steps Control
16.9
Maximum Short Circuit Current withstand capability : a. Current b. Time
16.10
16.11 16.12
16.13 16.14 16.15
In sq. mm (approx.)
Local indicator furnished for : a. Tap position b. Operation counter Number of revolutions to complete one step Time to complete one step on Manual operation Approximate overall weight Approximate overall dimensions Whether the following provisions are provided?
: :
ALWAYE OCTC
kV :
6.6 KV
A : kW :
250 A NA
V
165 volts 4 Manual
A : s :
Same as transformer Same as transformer
: : : s :
kg mm
Page 5 of 9
Provided Tap Indication NA NA NA
6030 (Approx) 2800 x 2800 x 2425 (mm) (Subject to 5% Tol.
Project : 2X135 TPP at Meenakshi Energy
Package: LV Auxiliary Transformer
Bidder’s Name: Voltamp Transformers Ltd.
NA a)
Padlocking NA
b) Auxiliary switch for interlocking
Provided On HV side openable doors.
c) Safety limit switch Bushings (for HV / LV / LVN) Make
:
HV/ LV/LVN
:
HV, LV & LVN – BB/CJI/JP/AP
Type
:
17.3
Reference Standard
:
HV – Epoxy, LV & LVN – Porcelain IS:2099
17.4
Voltage Class
17.5
Type of atmosphere
17.6
Creepage Distance
17.7
Free space required for bushing removal One minute power frequency withstand voltage Impulse withstand voltage Rated current
17.0 17.1
17.8
17.9 17.10 17.11 17.12 17.13 17.14
18.0 18.1
Rated short circuit current and duration Cantilever strength of the bushing Weight of the assembled bushings Mounting arrangement of the bushing Minimum Clearance Between Phases : a. In air I. HV ii. LV b. In oil I. HV
kV : : mm : :
12/1.1/1.1 Sea Shore Corrosive & Salt Laden Atmosphere 25 mm /KV 800 mm
kV RMS :
28/5/5
kV Peak :
75/NA/NA
A
1250/3150/2000
kA/ s kg
HV-40kA for 3 sec. LV-50kA for 1 sec. As per IS: 2099; 3347
kg
As per IS: 2099; 3347 HV – Cable box LV – Bus duct flange For Transformers & Bushings
mm : mm :
120 25.4
mm :
} NA
Page 6 of 9
Project : 2X135 TPP at Meenakshi Energy
18.2
Package: LV Auxiliary Transformer
Bidder’s Name: Voltamp Transformers Ltd.
Between Phase & Earth : a. In air I. HV ii. LV
mm : mm :
110 19
mm : mm : mm
} } NA 7.5 mm
b. In oil
19.1
I. HV ii. LV Clearance between core and coil Clearance between coils Clearance between neutral to ground in air Terminal Connections H.V.
19.2
L.V
:
Cable box with chamber Bus duct flange
19.3
L.V. Neutral
:
Inside LV bus duct flange
20.0 20.1
:
Yes
20.2 20.3
Marshalling Box Weatherproof, suitable for outdoor duty Degree of protection Painting shade
:
IPW-55 Siemens Grey, shade RAL 7032
21.0
Terminal Blocks
:
21.1
Make
:
Elemex/ reputed
21.2 21.3
: :
KUT 4 Yes
22.0 22.1
Type 17% spare terminals furnished? Wiring Cable type
:
FRLS Cable
22.2
Voltage grade
22.3
Conductor Size
18.3 18.4 18.5
19.0
mm 25 mm mm
:
V : 2
mm
Material Stranded
20 mm
Yes/No.
Nos. & Type of temperature detector
: : :
disconnection
1100 2.5 Copper Yes 02nos. per Phase PT-100 Type
Page 7 of 9
Project : 2X135 TPP at Meenakshi Energy
23.0
23.1 23.2
Package: LV Auxiliary Transformer
Trip and Alarm Contacts Ratings a.Transformer winding Alarm rating b.Transformer winding Trip rating Voltage Rated Making current
V : : A :
1A DC
Breaking Current
A :
1A DC
24.0
Accessories
25.0
Each transformer furnished with fittings and accessories as per specifiation ? Spare Parts
26.1 26.2
m : m :
26.3
Height
m :
27.0 27.1
Approximate Weights Core & Coil
27.2
Total Weight
28.0
Shipping Data
28.1
Weight of the heaviest kg. : package Dimension of the largest mm : package (LxBxH) List the parts detached for the transport Proposed method of transportation for the transformer Tests to be conducted on each Transformer
28.2 28.3 28.4
29.0
°C
125
°C
135
Yes / No :
Each transformer furnished with spare parts as per specification Approximate Overall Dimension Length Breadth
26.0
Bidder’s Name: Voltamp Transformers Ltd.
:
220VDC (+10% to -15%)
Yes
Yes – As per Order
2800mm 2800mm 2425 mm (Subject to 5% Tolerance)
Kg
4850 (Approx)
kg. :
Page 8 of 9
6030 (Approx) 6030 (Approx) 2800x2800x2425 mm(approx.) Rollers By Road
Project : 2X135 TPP at Meenakshi Energy
29.1
Package: LV Auxiliary Transformer
Bidder’s Name: Voltamp Transformers Ltd.
30 A.
Routine tests as per : specification / relevant standards will be provided? Core bolt withstand kV : voltage for 1 minute ACCESSORIES NEUTRAL CURENT TRANSFORMER
1.0 1.1 1.2 1.3
General Make Type Reference Standard
: : :
Pragti/Alpha Resin cast IS:2705
1.4
Use
:
REF & SEF
2.0
Rating
2.1
C.T.Ratio
2.2
Class
2.3
Insulation level
kVr
2.4 3.0
Burden Insulation Class
kVp VA : :
NA 15 E
3.1
Temperature rise at rated burden Characteristics
°C
:
90
Ω
4.2
Secondary resistance R CT at 75°C Knee point voltage Vk
4.3
Excitation current at Vk/2
5.0
Dimension and Weights
5.1
Dimension (LxBxH)
5.2
Weight
6.0
Tests)
B
TEMPERATURE SCANNER Manufacturer
29.2
4.0 4.1
1 2 3 31 32
Range Accuracy Class of Insulation Noise Level of Transformer
A :
All routine test as IS :11171
2 kVrms
2500/1A for REF
:
5P20
:
1.0 kVrms
2500/1 A, Class PS for SEF & LV Phase :
V : A. :
NA > 15Rct + 60V < 30 mA at Vk/2
mm :
Included
kg :
Included
:
As per IS:2705
Massibus % the Page 9 of 9
0-300 Deg.C +/-1% F 66 dB (Max.)
Project : 2X135 TPP at Meenakshi Energy
C 1 2 3
Package: LV Auxiliary Transformer
ENCLOSURE Material Thickness Degree of Protection Voltamp Reference No. : JN 18589
