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Oil Immersed Transformer

High Operational Reliability

The relevant parts of the fuel tank seal are improved to increase the reliability and improve the technological level to ensure the reliability of the seal.

Small Footprint

The transformer oil tank adopts corrugated plate radiator. When the oil temperature changes, the corrugated plate thermal expansion and contraction can replace the role of the oil conservator. The corrugated plate oil tank has a beautiful appearance and small footprint.

Long Lasting

The transformer oil tank adopts a fully sealed structure. The oil tank and the tank edge can be connected by bolts or welded to death. The transformer oil does not come into contact with the air, which prolongs the service life.

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Description

Product Types

The chart below is an overview of the characteristics for a sampling of large rectifier transformer:

Type 74MVA/110kV 134.05MVA/330kV 70.5MVA/220kV 106.26MVA/220kV 140MVA/220kV 136.2MVA/330kV
Capacity (MVA) 74 134 71 106 140 136
DC Voltage (V) 70 1230 880 1220 1350 1300
DC Current (A) 2×45000 2×46000 2×34000 2×37000 2×44000 2×44000
Number of Pulses 12 12 12 12 12 12

Technical Data of 10kV Low-Loss and Non-Exciting Regulation Oil Immersed Transformer

Rated Capacity(kVA) Rated Voltage Vector-group No-load Loss(W) 120℃ Load Loss(W) No-load Current(%) Short-circuit Impendance(%)
HV(kV) Tapping Ranges LV(kV)
30 6 

6.3

10

10.5

11

 ±5% 

±2×2.5%

 0.4 Dyn11 

Yyn0

 100 630/600 0.80 4.0
50 130 910/870 0.75
63 150 1090/1040 0.75
80 180 1310/1250 0.70
100 200 1580/1500 0.65
125 240 1890/1800 0.65
160 280 2310/2200 0.60
200 340 2730/2600 0.50
250 400 3200/3050 0.50
315 480 3830/3650 0.45
400 570 4520/4300 0.45
500 680 5410/5150 0.40
630 810 6200 0.40 4.5
800 980 7500 0.35
1000 1150 10300 0.35
1250 1360 12000 0.30
1600 1640 14500 0.30

Technical Data of  20kV Low-Loss and Non-Exciting Regulation Oil Immersed Transformer

Rated Capacity(kVA) Rated Voltage Vector-group No-load Loss(W) 120℃ Load Loss(W) No-load Current(%) Short-circuit Impendance(%)
HV(kV) Tapping Ranges LV(kV)
30 20 ±5% 

±2×2.5%

 0.4 Dyn11 90 660 2.1 5.5
50 130 960 2.0
63 150 1145 1.9
80 180 1370 1.8
100 200 1650 1.6
125 240 1980 1.5
160 290 2420 1.4
200 330 2860 1.3
250 400 3350 1.2
315 480 4010 1.1
400 570 4730 1.0
500 680 5660 1.0
630 810 6820 0.9 6.0
800 980 8250 0.8
1000 1150 11330 0.7
1250 1350 13200 0.7
1600 1630 15950 0.6
2000 1950 19140 0.6
2500 2340 22220 0.5

Technical Data of 35kV Low-Loss Oil Immersed Transformer

Rated capacity (kVA) Rated voltage  Vector group No-load loss (w) 75℃ Load loss (kw) No-load current (%) Short-circuit  

impendance

(%)
HV (kV) Tapping range LV (kV)
630 35 ±5% 3.15 

6.3

10.5

 Yd11 830 7 1.10 6.5
800 980 9 1.00
1000 1150 11 1.00
1250 1410 13 0.90
1600 1700 16 0.80
2000 2180 18 0.70
2500 2560 19 0.60
3150 35~38.5 ±5% 3.15 

6.3

10.5

 3040 23 0.56 7.0
4000 3620 27 0.56
5000 4320 31 0.48
6300 5250 35 0.48 7.5
8000 35~38.5 ±2*2.5% 3.15 

3.3

6.3

6.6

10.5

11

 Ynd11 7200 38 0.42
10000 8700 45 0.42
12500 10080 53 0.40 8.0
16000 12160 65 0.40
20000 14400 79 0.40
25000 17020 94 0.32
31500 20220 112 0.32

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