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Epoxy Resin Cast Dry-type Transformers

20kV and 35kV SC(B)
This series of products are used to directly reduce the power supply of 20 KV and 35kV grids to 400 V distribution power supply or 10KV transmission power supply for users. Since they have obvious advantages, they are adopted by more and more projects.
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They have the following main advantages:

  1. They reduce land occupation and multi-level substation construction, and have significant social benefits.
  2. They save project investment and improve economic benefits.
  3. They reduce 10KVpower transmission and transformation links, thus significantly reducing the operation and maintenance costs.
  4. They use the HV small current to replace the LV large current for power transmission, thus reducing line loss and line operation cost.
  5. The 35 kV and 20 kV power supplies are directly connected to the power consumption center, effectively improving the reliability of power supply.

The SCB series 20 KV and 35 KV non-excitation voltage regulation dry-type transformers produced by us are low-loss products meeting the national standard GB/T 10228-2023.

1. They have high performance and low loss.
2. They use high-quality silicon steel sheets to greatly reduce the magnetic flux density, magnetostriction,and noise during operation.
3. They optimize the HV coil structure, improve the distribution of inter-layer voltage and capacitance, greatly  increase the impact performance of the products to withstand atmospheric overvoltage and switching overvoltage, improve the electric field distribution, and further reduce the partial discharge of the products.
4. They can be equipped with temperature control systems and air cooling devices to automatically start the fan cooling devices when the load is too large, thus effectively improving the overload capacity of the equipment.

Technical parameter table for 20kV class 50kVA~2500KVA Dry-type non-excitation voltage distribution transformer

Rated capacity
(kVA)
voltage combination
and tapping range
connection symbol
No-load current (%)
No-load loss
(W)
load loss at different insulation levels (W)
Short Circuit impedance
(%)
High Voltage（KV）
HVtapping
range
(%)
Lowvo
Ltage
(KV)
130℃(B)
(100℃)
155℃(F)
(120℃)
180℃(H)
(145℃)
50
20
22
24
±2.5 ±5
0.4
Dyn11 Yyn0
1.8
305
1160
1230
1310
6.0
100
1.6
485
1870
1990
2130
160
1.4
600
2330
2470
2640
200
±2×2.5
±5
1.4
655
2770
2940
3140
250
1.2
755
3220
3420
3660
315
1.2
870
3850
4080
4360
400
1.0
1030
4650
4840
5180
500
1.0
1210
5460
5790
6190
630
0.9
1370
6450
6840
7320
800
0.9
1570
7790
8260
8840
1000
0.8
1860
9220
9780
10400
1250
0.8
2140
10800
11500
12300
1600
0.8
2510
13000
13800
14800
2000
0.6
2910
15400
16300
17500
2500
0.6
3480
18200
19300
20700
2000
0.6
2910
16800
17800
19100
8.0
2500
0.6
3480
20000
21200
22700

Technical parameter table for 35KV class 50kVA~2500KVA Dry-type non-excitation voltage distribution transformer

Rated capacity
(KVA)
Voltage combination and tapping range
connection symbol
No-load current %
No-loadloss W
load loss at different insulation levels W
Short Circuit impedance %
 High VoltageKV
 HVtapping range %
  Low voltage 
KV
130℃(B)
(100℃)
155℃(F)
(120℃)
180℃(H)
(145℃)
50
35
36
37
38.5
±2.5 ±5
0.4
Dyn11 Yyn0
2.1
405
1340
1420
1520
6.0
100
1.8
565
1970
2090
2230
160
1.4
710
2650
2810
3000
200
±2×2.5
±5
1.4
790
3130
3320
3550
250
1.2
890
3580
3800
4060
315
1.2
1050
4250
4510
4820
400
1.0
1230
5100
5410
5790
500
1.0
1450
6270
6650
7110
630
0.90
1670
7250
7690
8230
800
0.90
1940
8600
9120
9760
1000
0.70
2180
9860
10400
11100
1250
0.70
2540
12000
12700
13600
1600
0.70
2910
14600
15400
16500
2000
0.70
3430
17200
18200
19500
2500
0.70
4000
20600
21800
23300

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