Spec No.
TATA CONSULTING ENGINEER LTD Section: D
TCE.7701A-H-739-201
CAPACITOR VOLTAGE TRANSFORMER
SL. TCE SPECIFICATION. BY BIDDER
DETAILS UNIT
NO.
DATA SHEET A1 DATA SHEET B
1.0 GENERAL
1.1 Name of Manufacturer and country By Bidder
1.2 Applicable Standards IEC:61869/ 60044-5 / IEC-60358
1.3 Type CVT
1.4 Quantity Nos. As per SLD/BOQ
1.5 Nominal system voltage kV 400
1.6 Highest system voltage kV 420
1.7 Frequency Hz 50
1.8 System neutral earthing
a Type Solidly earthed
b Coefficient of earthing 0.8
1.9 Insulation withstand level
a 1.2/50 µSec. Impulse withstand voltage kV (peak) 1425
One minute power frequency withstand voltage of secondary
b kV (rms) By Bidder
winding
One minute power frequency withstand voltage of H.F.
c kV (rms) By Bidder
terminal
d One minute power frequency test voltage of Capacitor kV (rms) By Bidder
e Switching impulse withstand voltage kV(peak) 1050
1.10 Ambient Temperature Deg. C 50
1.11 Carrier frequency Coupling capacitance pF NA
1.12 HF Range kHz NA
2.0 DESIGN REQUIREMENTS
2.1 Rated primary voltage kV 400/√3
2.2 Rated secondary voltage V
a S1 110/√3
b S2 110/√3
c S3 110/√3
2.3 Number of secondaries Nos.
2.4 Winding material Cu
3.0 Method of connection
3.1 Primary winding Star
3.2 Secondary winding
a S1 Star
b S2 Star
c S3 Star
3.3 Application As per SLD
a S1
b S2
c S3
3.4 Rated burden As per SLD
a S1
b S2
c S3
PAGE 1 OF 2 Rev: R0
Spec No. TATA CONSULTING ENGINEER LTD Section: D
TCE.7701A-H-739-201
CAPACITOR VOLTAGE TRANSFORMER
SL. TCE SPECIFICATION. BY BIDDER
DETAILS UNIT
NO.
DATA SHEET A1 DATA SHEET B
d Total simultaneous burden (S1+S2+S3)
e Rated total thermal burden
3.5 Rated power factor 0.8 lagging (IS 3156)
a S1
b S2
c S3
3.6 Accuracy class As per SLD
a S1
b S2
c S3
3.7 Rated capacitance
a of high voltage capacitor pF By Bidder
b of intermediate voltage capacitor pF By Bidder
3.8 Bandwidth kHz
4.0 Rated voltage factor and corresponding rated time 1.2 Continuous and 1.5 for 30Sec.
5.0 Class of winding insulation A or better
6.0 Max. wdg. temp. at 110% excitation and rated burden By bidder
7.0 Creepage distance mm/kV 31
8.0 Secondary Cable/conduit size sq.mm 4
9.0 Earthing conductor Material GI
9.1 Size sq.mm 75 x 10
10.0 Seismic coefficient As per relevant standard
Radio interference voltage (for VT’s rated at 220 kV and
11.0 µv 1000
above)
12.0 Corona Extinction voltage kV (rms) 320
13.0 Cantilever strength of assembled CVT at terminal point As per relevant standard
14.0 TESTS
Wheteher similar equioment is Type tested as per IEC186
14.1 Yes/No Yes
and in successful operation for at least 2 years
14.2 Type test certificate enclosed Yes/No Yes
15.0 Technical/Description manual enclosed with Bid Yes/No Yes
16.0 Whether bird barrier provided Yes/No Yes
17.0 Whether corona ring provided Yes/No Yes
10 kV (rms) for exposed terminals
18.0 Test voltage of H.F. Terminal kVrms
and 4 KV (rms) for interior terminals
19.0 Test voltage of capacitor kVp by bidder
20.0 total weight kg by bidder
21.0 Quantity of oil litre by bidder
Whether CVT's are hermically sealed ?
22.0 Yes/No Yes
If so, Furnish the arrangement of sealing.
23.0 Overall General arrangement drawing of CVT is enclosed ? Yes/No Yes
24.0 Confirm whether in line with specifications Yes/ No Yes
PAGE 2 OF 2 Rev: R0
