Products
110kV、220kV power transformer
110kV、220kV power transformer
Model:
Details

General:

Our SF、SFZ、SFS、SFSZ series power transformers of 110KV voltage grade have the single maximum capacity of 240000KVA and of400000kVA for 220KV series.
The series are developed integrating advanced domestic and international technology with low loss, low noise, low partial discharge, strong short-circuit resistance.
The transformers can convert network voltage into system or load voltage realizing the transmission and distribution of power energy. They can be installed indoor or outdoor, especially suitable for wet environment service. They are the ideal equipments for factories, countryside, and city distribution network.
Standards applied:
GBIO94.1～2-1996《Power transformer》；
GB1094.3、5-85 《Power transformer》；
GB/T6451-1995《Specification and technical requirements for three-phase oil-immersed power transformers》
IEC76《Power transformer》
Characteristic:
1.     Strong short-circuit resistance:
Using advanced calculating procedure to calculate the circuit-conditions of transformer, analyze the force conditions and deformation on every part of coil under short-circuit. All this greatly enhances the short-circuit resistance of transformers.
2.     Low losses:
Application of multiple shield methods to control magnetic leakage, lower load losses and avoid partial over-heat.
The transformers apply high-quality cold-rolled grain-oriented high magnetic silicon steel sheets with chamfered and step-lapped joints, without holes or laminated upper yoke. This decreases no-load losses, no-load current and electromagnetic noise.
3.     High mechanical strength:
The transformer body applies six-side positioning method to stand delivery acceleration of horizontal direction no more than 0.3g, vertical direction no more than 0.15g.
Technical parameter of 110KV power transformer:
1.     Double-winding power transformer with off-circuit tap changing

Type
Voltage combination and tapping range
（kV）
Vector group
No-load loss
(kW)
Load loss
(kW)
No-load current
(%)
Impedance voltage
(%)
HV
LV
SF10-6300/110
110
115
121
±2×2.5%
6.3
6.6
10.5
11
YN d11
8.0
34
0.65
10.5%
SF10-8000/110
9.5
42
0.65
SF10-10000/110
11.2
48.5
0.65
SF10-12500/110
12.1
59
0.55
SF10-16000/110
16
73
0.5
SF10-20000/110
18.5
86
0.5
SF10-25000/110
21.3
98
0.5
SF10-31500/110
24.2
120
0.5
SF10-40000/110
29.3
139
0.5
SF10-50000/110
36
180
0.5
SF10-63000/110
40
217
0.5
SF10-75000/110
48
246
0.5
SFP10-75000/110
39.2
248
0.5
SFP10-80000/110
51.9
273
0.5
SFP10-90000/110
53.2
283
0.4
SFP10-150000/110
15.75
13.8
79.2
420
0.4
SFP10-240000/110
141
601
0.4

2.     Three-winding power transformer with off-circuit tap changing

Type
Voltage combination and tapping range
（kV）
Vector group
No-load loss
(kW)
Load loss
(kW)
No-load current
(%)
Short-circuit impedance
HV
MV
LV
Step-up transformer
Step-down transformer
SFS10-6300/110
110
115
121
±
2×2..5%
35
36.6
38.5±
2×2.5%
6.3
6.6
10.5
11
YN
yn0
d11
9.5
45
0.7
High-medium
17.5%
 
High-low
10.5%
 
Medium-low
6.5%
High-medium
10.5%
 
High-low
17.5%
 
Medium-low
6.5%
SFS10-8000/110
11.5
53
0.7
SFS10-10000/110
13.5
62
0.7
SFS10-12500/110
16.0
73
0.7
SFS10-16000/110
18.6
87
0.7
SFS10-20000/110
20.5
101
0.6
SFS10-25000/110
23.1
119
0.6
SFS10-31500/110
31.5
143
0.6
SFS10-40000/110
36.4
174
0.6
SFS10-50000/110
48
208
0.5
SFSP10-63000/110
50.2
248
0.5
SFSP10-75000/110
53.1
283
0.5

3.     Double-winding power transformer with OLTC

Type
Voltage combination and tapping range
（kV）
Vector group
No-load loss
(kW)
Load loss
(kW)
No-load current
(%)
Short-circuit impedance
 (%)
HV
LV
SFZ10-6300/110
110±8×1.25%
6.3
6.6
10.5
11
YN d11
8.5
35
0.55
10.5%
SFZ10-8000/110
10.5
43
0.55
SFZ10-10000/110
12.0
50
0.55
SFZ10-12500/110
14.5
59
0.55
SFZ10-16000/110
16.4
70
0.5
SFZ10-20000/110
18.9
85
0.5
SFZ10-25000/110
22.6
101
0.5
SFZ10-31500/110
26.4
117
0.45
SFZ10-40000/110
32.6
142
0.4
SFZ10-50000/110
34.6
179
0.4
SFZ10-63000/110
39
217
0.4

4.     Three-winding power transformer with OLTC

Type
Voltage combination and tapping range
（kV）
Vector group
No-load loss
(kW)
Load loss
(kW)
No-load current
(%)
Impedance voltage
HV
MV
LV
Step-up transformer
Step-down transformer
SFSZ10-6300/110
110±
8×1.25%
35
36.6
38.5
±2×2.5%
6.3
6.6
10.5
11
YN
yn0
d11
10.5
45
0.6
High-medium
17.5%
 
High-low
10.5%
 
Medium-low
6.5%
High-medium
10.5%
 
High-low
17.5%
 
Medium-low
6.5%
SFSZ10-8000/110
12.5
54
0.6
SFSZ10-10000/110
14.5
63
0.6
SFSZ10-12500/110
16.9
70
0.6
SFSZ10-16000/110
19.4
86
0.6
SFSZ10-20000/110
22.6
102
0.6
SFSZ10-25000/110
26.2
142
0.5
SFSZ10-31500/110
31.7
145
0.5
SFSZ10-40000/110
35
172
0.5
SFSZ10-50000/110
37.1
207
0.46
SFSZ10-63000/110
42.7
243
0.42

Technical parameter of 110KV power transformer:
1.     Three-phase double-winding power transformer with off-circuit tap-changing

Type
Rated capacity
(kVA)
Rated voltage
Vector group symbol
Loss (kW)
No-load current(%)
Short-circuit impedance(%)
HV
(kV)
LV
(kV)
No-load
On-load
SF11-31500/220
31500
220±2
×2.5%
 
242±2
×2.5%
6.3
6.6
10.5
11
YNd11
28
128
0.70
12～14
SF11-40000/220
40000
33
149
0.70
SF11-50000/220
50000
39
180
0.65
SF11-63000/220
63000
46
209
0.65
SF11-75000/220
75000
10.5
11
13.8
54
238
0.60
SF11-90000/220
90000
62
274
0.55
SF11-120000/220
120000
75
328
0.55
SF11-150000/220
150000
11
13.8
15.75
18
20
90
385
0.50
SF11-180000/220
180000
102
436
0.46
SF11-240000/220
240000
128
539
0.42
SF11-300000/220
300000
15.75
18
20
151
641
0.38
SF11-360000/220
360000
174
735
0.38
SF11-400000/220
400000
187
795
0.35
Remark: 1. Rated capacity smaller than 31500kVA transformers and of other voltage combination can be supplied according to customer requirements.
2. Transformers of low voltage 35kV or 38.5kV can be supplied according to customer requirements.
3. Transformers without tap-changers will take priority. If needed, tapping points can be fitted.

2.     Three-phase three-winding power transformer with off-circuit tap-changing

Type
Rated capacity (kVA)
Rated voltage
Vector group symbol
Loss (kW)
No-load  current (%)
Short-circuit impedance (%)
HV(kV)
MV
(kV)
LV
(kV)
No-load
On-load
Step-up transformer
Step-down transformer
SFS11-31500/220
31500
220±2
×2.5%
 
242±2
×2.5%
69
115
121
6.3
6.6
10.5
11
35
37
38.5
YNyn
0d11
32
154
0.70
High-medium
22～24
 
High-low
12～14
 
Medium-low
7～9
High-medium
12～14
 
High-low
22～24
 
Medium-low
7～9
SFS11-40000/220
40000
38
180
0.63
SFS11-50000/220
50000
45
214
0.56
SFS11-63000/220
63000
53
248
0.56
SFS11-90000/220
90000
10.5
11
13.8
35
37
38.5
69
333
0.49
SFS11-120000/220
120000
85
410
0.49
SFS11-150000/220
150000
11
13.8
15.75
35
37
38.5
100
487
0.42
SFS11-180000/220
180000
114
556
0.42
SFS11-240000/220
240000
141
684
0.35
SFS11-300000/220
300000
166
808
0.30
Remark:  1.capacity assignment of load loss in the table is (100/100/100)%。capacity assignment of boosting structure is (100/50/100)%，capacity assignment of reducing structure is (100/100/50)% or (100/50/100)%。
2. Rated capacity smaller than 31500kVA transformers and of other voltage combination can be supplied according to customer requirements.
3. Transformers without tap-changers will take priority. If needed, tapping points can be fitted.

3.     Three-phase double-winding power transformer with OLTC

Type
Rated capacity
(kVA)
Rated voltage
Vector group symbol
Loss (kW)
No-load current(%)
Short-circuit impedance(%)
HV
(kV)
LV
(kV)
No-load
On-load
SFZ11-31500/220
31500
220±8
×1.25%
6.3
6.6
10.5
11
35
37
38.5
YNd11
30
128
0.70
12～14
SFZ11-40000/220
40000
36
149
0.63
SFZ11-50000/220
50000
43
180
0.56
SFZ11-63000/220
63000
50
209
0.56
SFZ11-90000/220
90000
10.5
11
35
37
38.5
64
274
0.49
SFZ11-120000/220
120000
79
329
0.49
SFZ11-150000/220
150000
93
385
0.42
SFZ11-180000/220
180000
108
445
0.42
SFZ11-120000/220
120000
66
69
82
337
0.49
SFZ11-150000/220
150000
96
394
0.42
SFZ11-180000/220
180000
112
451
0.42

4.     Three-phase three-winding power transformer with OLTC

Type
Rated capacity (kVA)
Rated voltage
Vector group symbol
Loss (kW)
No-load current
(%)
Capacity assignment (%)
Short-circuit impedance(%)
HV (kV)
MV
(kV)
LV
(kV)
No-load
On-load
SFSZ11-31500/220
31500
220±8
×1.25%
69
115
121
6.3
6.6
10.5
11
35
37
38.5
Ynyn
0d11
35
154
0.77
100/100/100
100/50/100

100/100/50
High-medium
12～14
 
High-low
22～24
Medium-low
7～9
SFSZ11-40000/220
40000
42
180
0.70
SFSZ11-50000/220
50000
48
214
0.63
SFSZ11-63000/220
63000
56
248
0.63
SFSZ11-90000/220
90000
10.5
11
35
37
38.5
74
333
0.56
SFSZ11-120000/220
120000
92
410
0.56
SFSZ11-150000/220
150000
108
487
0.49
SFSZ11-180000/220
180000
125
599
0.49
SFSZ11-240000/220
240000
154
741
0.45
Remark: 1. Listed data is suitable for voltage lowering products, if needed boosting products can be supplied.
2. capacity assignment of load loss in the table is (100/100/100)%。
3. products with low voltage of 6.3kV、6.6kV、10.5kV、11kV are not recommended.

5.     Three-phase three-winding auto-power-transformer with OLTC

Type
Rated capacity (kVA)
Rated voltage
Vector group symbol
Loss (kW)
No-load current(%)
Capacity assignment (%)
Short-circuit impedance(%)
HV
(kV)
MV
(kV)
LV
(kV)
No-load
On-load
SFSZ11-31500/220
31500
220±8
×1.25%
115
121
6.3
6.6
10.5
11
35
37
38.5
Yna
0d11
20
103
0.56
100/100/50
High-medium
8～10
 
High-low
28～34
 
Medium-low
18～24
SFSZ11-40000/220
40000
24
125
0.56
SFSZ11-50000/220
50000
29
149
0.49
SFSZ11-63000/220
63000
34
180
0.49
SFSZ11-90000/220
90000
41
235
0.42
SFSZ11-120000/220
120000
10.5
11
35
37
38.5
51
293
0.42
SFSZ11-150000/220
150000
61
347
0.35
SFSZ11-180000/220
180000
68
398
0.35
SFSZ11-240000/220
240000
83
513
0.30
注: 1. Listed data is suitable for voltage lowering products.
2. products with low voltage of 6.3kV、6.6kV、10.5kV、11kV are not recommended.