SC(B)10 Series Three-Phase Resin-Insulated Dry-Type Power Transformer (10 kV and 20 kV Classes)

The SC(B)10 series 20 kV‑class epoxy‑cast, no‑excitation‑regulation dry‑type transformer utilizes a F‑class epoxy resin compound with filler. After vacuum thin‑film degassing, the windings—high‑ and low‑voltage coils reinforced with glass‑fiber molded mesh—are cast in thin layers under vacuum and pressure. This results in a dry‑type transformer boasting exceptionally high mechanical strength, electrical insulation performance, and thermal resistance. As the 20 kV voltage level falls between 10 kV and 35 kV, it offers advantages such as a longer supply radius, reduced voltage drop, lower line losses, and decreased non‑ferrous metal consumption, thereby addressing the limitations of 10 kV distribution networks. Consequently, 20 kV distribution transformers are key products strongly recommended by State Grid Corporation and provincial authorities.

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SC(B)10 Series Three-Phase Resin-Insulated Dry-Type Power Transformer (10 kV and 20 kV Classes)

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Product Description

  Overview

  The SC(B)10 series 20 kV class epoxy‑cast, no‑excitation‑regulating dry‑type transformer utilizes a F‑class epoxy resin compound with filler. After vacuum thin‑film degassing, the windings—high‑ and low‑voltage coils reinforced with glass‑fiber forming meshes—are cast in thin layers under vacuum and pressure. This results in a dry‑type transformer with exceptionally high mechanical strength, electrical strength, and thermal resistance. As the 20 kV voltage level falls between 10 kV and 35 kV, it offers advantages such as a longer service radius, reduced voltage drop, lower line losses, and decreased non‑ferrous metal consumption, thereby addressing the limitations of 10 kV distribution networks. Consequently, 20 kV distribution transformers are key products strongly recommended by State Grid Corporation and provincial authorities.

 

  Product Features

  1. Flame-retardant, explosion-proof, pollution-free, maintenance-free, and capable of decentralized installation at the load center, thereby reducing capital investment and lowering costs.

  2. Low losses and excellent energy-saving performance deliver significant operational cost savings.

  3. Partial discharge level is less than 10 pC; the coil is non-hygroscopic and dust‑resistant, with high mechanical strength and excellent reliability, resulting in cost savings.

  4. Excellent short-circuit resistance and superior lightning‑impulse withstand capability.

  5. The enclosure is available in three materials—stainless steel, cold‑rolled sheet steel, and aluminum alloy—and comes in two configurations: forced‑air ventilation and natural heat dissipation. Cable entry and exit can be configured as top‑in/top‑out, bottom‑in/top‑out, or bottom‑in/bottom‑out.

  6. The transformer can be equipped with a temperature control and display system upon customer request, and can be used in conjunction with a temperature control system.

 

  Ordering Instructions

  When placing your order, please provide the following parameters:

  1. Product Model

  2. Rated Capacity

  3. Voltage Combination

  4. Scope of Adjustment

  5. Frequency

  6. Connection Group Designation

  7. Short-circuit impedance

  8. For products with special requirements, specify the technical specifications.

 

  Technical Performance Parameters

Model number
Model
Rated current
Rated Current
(A)
Voltage combination
Voltage Combution
Group Association
Connection symbol
No-load current
No-load Current
(%)
No-load loss
No-load Loos
(W)
Load loss
Load Loos(120℃)
(W)
Impedance voltage
Impedance Voltage UK(%)
High pressure
H.V.(KV)
Low pressure
L.V.(KV)
SC10-315
9.09
454.7
20±
2x2.5%
0.4

Dyn11


YynO

0.7
960
4060
6
SC(B)10-400
11.5
577.4
0.6
1140
4820
SC(B)10-500
14.4
721.7
0.6
1330
5760
SC(B)10-630
18.2
909
0.5
1510
6800
SC(B)10-800
23.1
1154.7
0.5
1730
8220 
SC(B)10-1000
28.9
1443.4
0.5
2040
9730
SC(B)10-1250
36.1
1804.3
0.5
2360
11480
SC(B)10-1600
46.2
2309
0.5
2760
13790
SC(B)10-2000
57.7
2886.7
0.5
3200
16280
SC(B)10-2500
72.2
3608.4
0.4
3820
19270

  Note: The performance parameters in the table also apply to three-phase transformers with a high-voltage rating of 20 (10 kV) and dual voltage ratings.

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