Pole-Mounted Transformer

For extra-high voltage transformers, we adopt Toshiba (Japan) analytical software together with the company’s proprietary calculation and verification programs to conduct comprehensive optimized design and verification on core, windings, active part, leads, tank and other components, securing excellent product performance. Benefiting from advanced processing equipment, strict material selection and high-efficiency production, the transformer features compact size, light weight, low loss, low partial discharge and low noise. It is premium-quality, energy-saving, eco-friendly, easy to install and maintain, reliably operated and capable of cutting operating costs effectively.
Our model SZ22-24000/220 has passed short-circuit withstand test as well as all routine and type tests at China National Transformer Quality Supervision & Inspection Center.
Featuring stable performance, high reliability, cost efficiency and environmental friendliness, this product is widely applied in power plants, substations, large industrial, mining and petrochemical enterprises.

 

330kV Power Transformer
90000kV/A-720000kV/A three-phase double-winding non-exciting voltage regulator transformer
Rated capacity
(kVA)		 Rated voltage and tapping range Vector group No load current Short-circuit impedance No load losses On load losses
HV LV % % kW kW
90000 345
345±2×2.5%
363
363±2×2.5%		 10.5
13.8
15.75
18
20		 YNd11 0.44 14-15 68 274
120000 0.44 85 340
150000 0.41 101 402
180000 0.38 116 461
240000 0.34 145 572
360000 0.34 198 802
370000 0.30 202 818
400000 0.30 214 867
720000 0.20 332 1347
90000kV/A-2400000kV/A three-phase three-winding non-exciting voltage regulator transformer
Rated capacity
(kVA)		 Rated voltage and tapping range Vector group No load current No load losses On load losses Short-circuit impedance Capacity Allocation
HV MV LV % kW kW % %
90000 330±2×2.5%
345±2×2.5%		 121 10.5
13.8
15.75		 YNyn0d11 0.46 77.0 335 24-26
14-15
8-9		 100/100/100
120000 0.46 96.0 415
150000 0.43 114 491
180000 0.43 130 563
240000 0.40 162 699
90000kV/A-360000kV/A Three-phase three-winding unexcited voltage regulating autotransformer(Series winding voltage regulation)
Rated capacity
(kVA)		 Rated voltage and tapping range Vector group No load current No load losses On load losses Short-circuit impedance Capacity Allocation
HV MV LV % kW kW % %
90000 330±2×2.5% 121 10.5
11
35
38.5		 YNa0d11 0.36 45.0 263 10-11
24-26
12-14		 100/100/30
120000 0.36 56.0 324
150000 0.32 68.0 385
180000 0.32 77.0 440
240000 0.28 96.0 547
360000 0.28 130 742
90000kV/A-360000kV/A Three-phase three-winding on-load voltage regulating autotransformer
(series winding end voltage regulation)
Rated capacity
(kVA)		 Rated voltage and tapping range Vector group No load current No load losses On load losses Short-circuit impedance Capacity Allocation
HV MV LV % kW kW % %
90000 330±2×2.5%
345±2×2.5%		 121 10.5
11
35
38.5		 YNa0d11 0.40 47.0 261 10-11
24-26
12-14		 100/100/30
120000 0.40 59.0 324
150000 0.36 69.0 383
180000 0.36 79.0 440
240000 0.32 99.0 547
360000 0.32 134 742
90000kV/A-360000kV/A Three-phase three-winding on-load voltage regulating autotransformer
(medium voltage line end regulator 1)
Rated
capacity
(kVA)		 Rated voltage and
tapping range		 Vector
group		 No load
current
%		 No load
losses
kW		 On load
losses
kW		 Short-circuit
impedance
%		 Capacity
Allocation
%
HV MV LV
90000 330
345		 121±8×1.25% 10.5
11
35
38.5		 YNa0d11 0.40 49.0 279 10-11
26-28
16-17		 100/100/30
120000 0.40 61.0 346
150000 0.36 72.0 410
180000 0.36 83.0 470
240000 0.32 102 584
360000 0.32 139 792
90000kV/A-360000kV/A Three-phase three-winding unexcited voltage regulating autotransformer(medium voltage line end voltage regulation)
Rated
capacity
(kVA)		 Rated voltage and
tapping range		 Vector
group		 No load
current
%		 No load
losses
kW		 On load
losses
kW		 Short-circuit
impedance
%		 Capacity
Allocation
%
HV MV LV
90000 330
345		 230±2×2.5%
230±3×2.5%
242±2×2.5%
242±3×2.5% 		10.5
11
35
38.5		 YNa0d11 0.32 23.0 293 10-11 100/100/30
120000 0.28 29.0 363
150000 0.24 34.0 431
180000 0.24 39.0 494
240000 0.20 49.0 613
360000 0.20 67.0 836
31500kVA~240000kVA three-winding transformer with NLTC (HV neutral is indirect grounding)
Rated
capacity
(kVA)		 Rated voltage and tapping range Vector
group		 No load
current
%		 Impedance voltage % No load
losses
kW		 On load
losses
kW
HV(%) MV LV Step up Step down
31500 220±2×2.5
242±2×2.5		 69,121 6.3,6.6,10.5,
11,35,38.5		 YNyn0d11 0.70 22-24
12-14
7-9		 12-14
22-24
7-9		 40 162
40000 6.3,6.6,10.5,
11,35,38.5		 0.63 48 289
50000 6.3,6.6,10.5,
11,35,38.5		 0.56 56 225
63000 6.3,6.6,10.5,
11,35,38.5		 0.56 66 261
90000 10.5,11,
13.8,35,38.5		 0.49 86 351
120000 10.5,11,
13.8,35,38.5		 0.49 106 432
150000 11,13.8,
15.75,35,38.5		 0.42 125 513
180000 11,13.8,
15.75,35,38.5		 0.42 142 585
240000 11,13.8,
15.75,35,38.5		 0.35 176 720
31500kVA~240000kVA transformer with NLTC (HV neutral is indirect grounding)
Rated
capacity
(kVA)		 Rated voltage and tapping range Vector
group		 No load
current
%		 Impedance
voltage
%		 No load
losses
kW		 On load
losses
kW
HV LV
31500 220±2×2.5% 63,66,69 YNd11 0.89 12~14 38 151
40000 0.89 45 176
50000 0.82 53 211
63000 0.82 63 247
90000 0.75 83 323
120000 0.75 102 387
150000 0.68 122 453
180000 0.68 138 513
240000 0.61 171 635
31500KVA~180000kVA Two-winding transformer with OLTC (HV neutral is indirect grounding)
Rated
capacity
(kVA)		 Rated voltage and tapping range Vector
group		 No load
current
%		 Short-circuit
Impedance
%		 No load
losses
kW(9)		 On load
losses
kW(9)
HV LV
31500 220±8×1.25% 6.3,6.6,10.5,
11,35,37,38.5		 YNd11 0.77 12~14 38 135
40000 0.63 45 157
50000 0.56 54 189
63000 0.56 63 220
90000 0.49 80 288
120000 10.5,11,35,
37,38.5		 0.49 99 346
150000 0.42 116 405
180000 0.42 135 468
31500kVA~240000kVA Autotransformer with OLTC (HV neutral is indirect grounding)
Rated
capacity
(kVA)		 Rated voltage and tapping range Vector
group		 No load
Loss
kW		 On load
losses
kW		 No load
current
%		 Capacity
Allocation
%		 Short-circuit
Impedance
%
HV (%) MV LV
31500 220±8×1.25 115 6.3,6.6,10.5,
11,35,
37,38.5		 YNa0d11 25 108 0.56 100/100/50 8~10
28~34
18~24
40000 30 132 0.56
50000 36 157 0.49
63000 42 189 0.49
90000 51 247 0.42
120000 10.5,11,
35,37,
38.5		 64 308 0.42
150000 73 365 0.35
180000 85 419 0.35
240000 104 540 0.3
63000kVA~180000kVA Autotransformer with OLTC (HV neutral is indirect grounding)
Rated
capacity
(kVA)		 Rated voltage and tapping range Vector
group		 No load
Loss
kW		 On load
losses
kW		 No load
current
%		 Capacity
Allocation
%		 Short-circuit
Impedance
%
HV (%) MV LV
63000 220±8×1.25 115 6.3,6.6,10.5,
11,35,37,38.5		 YNa0d11 42 189 0.49 100/100/50 8~10
28~34
18~24
90000 51 247 0.42
120000 10.5,11,35,
37,38.5		 64 308 0.42
150000 85 365 0.35
180000 104 419 0.35

110kV Three-phase On-load Power Transformer

6300kVA~120000kVA two-winding transformer with NLTC

Rated capacity (kVA) Rated voltage and tapping range Vector group No load current Impedance voltage No load Losses On load Losses
HV tapping range LV % % kW kW
6300 110
121		 ±2×2.5% 6.3,6.6,
10.5,11		 YNd11 0.77 10.5 9.3 36
8000 0.77 11.2 45
10000 0.72 13.2 53
12500 0.72 15.6 63
16000 0.67 18.8 77
20000 0.67 22 93
25000 0.62 26 110
31500 0.6 30.8 133
40000 0.56 12-14 36.8 156
50000 0.52 44 194
63000 0.48 52 234
75000 0.42 59 278
90000 0.38 12-14 68 320
120000 0.34 12-14 84.8 397
6300kVA~100000kVA three-winding transformer with NLTC
Rated capacity Rated voltage and tapping range Vector group No load current Impedance voltage (%) No load Losses On load Losses
(kVA) HV（%） MV LV % Step up Step down kW kW
6300 110±2×2.5
121±2×2.5		 35,
38.5		 6.3,6.6,
10.5,11		 YNyd011 0.82 17.5~18.5
10.5
6.5		 10.5
17.5~18.5
6.5		 11.2 47
8000 0.78 13.2 56
10000 0.74 15.8 66
12500 0.7 18.4 78
16000 0.66 22.4 95
20000 0.65 26.4 112
25000 0.6 30.8 133
31500 0.6 36.8 157
40000 0.55 43.6 189
50000 0.55 52 225
63000 0.5 61.6 270
75000 0.5 70.2 307.7
80000 0.5 73.7 323
100000 0.5 87.1 381.8
6300kVA~100000kVA two-winding transformer with OLTC
Rated capacity
(kVA)		 Rated voltage and tapping range Vector group No load current
%		 Impedance voltage
%		 No load Losses
kW		 On load Losses
kW
(kVA) HV tapping range LV % % kW kW
6300 110 ±8×1.25% 6.3,6.6,
10.5,11		 YNd11 0.8 10.5 10 36
8000 0.8 12 45
10000 0.74 14.2 53
12500 0.74 16.8 63
16000 0.69 20.2 77
20000 0.69 24 93
25000 0.64 28.4 110
31500 0.64 33.8 133
40000 0.58 40.4 156
50000 0.58 47.8 194
63000 0.52 56.8 234
75000 0.63 64.7 266.7
80000 0.63 67.9 297.9
100000 0.63 80.3 330.9
6300kVA~100000kVA three-winding transformer with OLTC
Rated capacity Rated voltage and tapping range Vector group No load Losses On load Losses No load Current Impedance voltage
(kVA) HV MV LV kW kW % %
6300 110±8×1.25 35
37
38.5		 6.3,6.6,
10.5,11		 YNyn0d11 12 47 0.95 10.5
17.5~18.5
6.5
8000 14.4 56 0.95
10000 17.1 66 0.89
12500 20.2 78 0.89
16000 24.2 95 0.84
20000 28.6 112 0.84
25000 33.8 133 0.78
31500 40.2 157 0.78
40000 48.2 189 0.73
50000 56.9 225 0.73
63000 67.7 270 0.67
75000 77.2 307.7 0.84
80000 81 323 0.84
100000 95.7 381.8 0.84
6300kVA~100000kVA two-winding transformer (LV is 35kV) with NLTC
Rated capacity Rated voltage and tapping range Vector group No load Losses On load Losses No load Current Impedance voltage
(kVA) HV LV kW kW % %
6300 110±2×2.5
121±2×2.5		 35
37
38.5		 YNd11 10 39 0.84 10.5
8000 12 47 0.84
10000 14 55 0.78
12500 16.4 66 0.78
16000 19.6 81 0.72
20000 23.2 99 0.72
25000 27.4 116 0.67
31500 32.4 140 0.67
40000 38.6 164 0.61
50000 46.2 204 0.61
63000 54.6 245 0.56
75000 62.2 279.2 0.70
80000 65.3 293.1 0.70
100000 77.2 346.5 0.70

66kV Power Transformer

6300kVA~63000kVA two-winding transformer with OLTC

Rated capacity Rated voltage and tapping range Vector group Impedance voltage No load Losses On load Losses No load Losses On load Losses No load Losses On load Losses
(kVA) HV tapping range LV % kW(9) kW(9) kW(10) kW(10) kW(11) kW(11)
6300 63
66
69		 ±8×1.25% 6.3,6.6,
10.5,11		 YNd11 9.0 10 36 9.4 34 8.3 34
8000 12 42.8 11.1 40.4 9.8 40.4
10000 14.2 50.4 13.1 47.6 11.6 47.6
12500 16.8 59.9 15.4 56.5 13.6 56.5
16000 20.2 73.5 18.4 69.4 16.3 69.4
20000 24 89.1 21.8 84.2 19.2 84.2
25000 28.4 105.3 25.6 99.5 22.6 99.5
31500 33.7 126.9 30.3 119.9 26.8 119.9
40000 40.3 149 36.1 140.7 31.9 140.7
50000 47.6 184.5 42.6 174.3 37.6 174.3
63000 56.2 222.3 50.3 210 44.4 210

630kVA~63000kVA Two-winding transformer with NLTC

Rated capacity
(kVA) 		Rated voltage and tapping range Vector group Impedance voltage No load Losses On load Losses No load Losses On load Losses No load Losses On load Losses
(kVA) HV tapping range LV % kW(9) kW(9) kW(10) kW(10) kW(11) kW(11)
630 63
66
69		 ±5% 6.3,6.6,1
0.5,11		 Yd11 8.0 1.6 7.6 1.4 7.1 1.3 7.1
800 1.9 9 1.7 8.5 1.5 8.5
1000 2.3 10.4 2 9.9 1.8 9.9
1250 2.7 12.6 2.4 11.9 2.1 11.9
1600 3.2 14.9 2.9 14 2.6 14
2000 3.8 17.6 3.4 16.6 3 16.6
2500 4.5 20.7 4 19.6 3.5 19.6
3150 5.3 24.3 4.8 23 4.2 23
4000 ±2×2.5% YNd11 9.0 6.3 28.8 5.6 27.2 5 27.2
5000 7.4 32.4 6.6 30.6 5.9 30.6
6300 9.2 36 8.5 34 7.5 34
8000 11.2 42.8 10.2 40.4 9 40.4
10000 13.2 50.4 12.1 47.6 10.7 47.6
12500 15.6 59.9 14.2 56.5 12.5 56.5
16000 18.8 73.5 17.1 69.4 15.1 69.4
20000 22 89.1 20.2 84.2 17.9 84.2
25000 26 105.3 23.9 99.5 21.1 99.5
31500 30.8 126.9 28.4 119.9 25.1 119.9
40000 36.8 149 34 140.7 30 140.7
50000 44 184.5 40.1 174.3 35.4 174.3
63000 52 222.3 47.7 210 42.1 210

90000kV/A-360000kV/A Three-phase three-winding on-load voltage regulating autotransformer
(medium voltage line end voltage regulator II)

Rated capacity Rated voltage and tapping range Vector group No load current No load losses On load losses Short-circuit impedance Capacity Allocation
(kVA) HV MV LV % kW kW % %
90000 330
345
363		 230±4×1.25%
230±8×1.25%
242±4×1.25%
242±8×1.25%		 10.5
11
35
38.5		 YNa0d11 0.32 25.0 293 10-11 100/100/30
120000 0.28 31.0 363
150000 0.24 37.0 431
180000 0.24 42.0 494
240000 0.26 53.0 613
360000 0.30 72.0 837

220kV Power Transformer

31500kVA~360000kVA two-winding transformer with NLTC (HV neutral is indirect grounding)

Rated capacity Rated voltage and tapping range Vector group No load current Impedance voltage No load losses On load losses
(kVA) HV LV % % kW kW
31500 220±2×2.5%
242±2×2.5%		 6.3,6.6,10.5,11 YNd11 0.7 12~14 35 135
40000 0.7 41 157
50000 0.65 49 189
63000 0.65 58 220
90000 10.5,13.8,11 0.55 77 288
120000 0.55 94 345
150000 0.5 112 405
180000 11,13.8,15.75 0.46 128 459
240000 0.42 160 567
300000 15.75,18 0.38 189 675
360000 0.38 217 774

31500kVA~240000kVA Autotransformer with NLTC (HV neutral is indirect grounding)

Rated capacity Rated voltage and tapping range Vector group step up set Step down set Short-circuit impedance(%)
(kVA) HV(%) MV LV No load Loss
kW		 On Load Loss
kW		 No Load Current
%		 No Load Loss
kW		 On Load Loss
kW		 No Load Current
%		 Step up Step down
31500 220±2×2.5
242±2×2.5		 121 6.6,10.5,
11,35,
37,38.5		 YNa0d11 25 117 0.57 22 99 0.5 12~14
8~12
14~18		 8~10
28~34
18~24
40000 29 144 0.57 26 121 0.5
50000 34 170 0.5 30 144 0.43
63000 40 201 0.5 36 171 0.43
90000 50 276 0.43 46 234 0.36
120000 10.5,11,
13.8,
15.75,
18,35,
37,38.5		 62 340 0.43 56 288 0.36
150000 73 405 0.36 66 342 0.33
180000 84 463 0.36 76 387 0.33
240000 99 595 0.33 89 504 0.25

63000kVA~180000kVA Autotransformer with OLTC (HV neutral is indirect grounding)

Rated capacity Rated voltage and tapping range Vector group No load Loss On load losses No load current Capacity Allocation Short-circuit Impedance
(kVA) HV（%） MV LV kW kW % % %
63000 220±8×1.25 115 6.3,6.6,10.5,
11,35,37,38.5		 YNa0d11 42 189 0.49 100/100/50 8~10
28~34
18~24
90000 51 247 0.42
120000 10.5,11,35,
37,38.5		 64 308 0.42
150000 85 365 0.35
180000 104 419 0.35
Oil Immersed Transformer
Dry Type Transformer
Three-Phase Pad-Mounted Transformer
Pole-Mounted Transformer
High Voltage Power Transformer
Single-Phase Pad-Mounted Transformer