PRODUCT
Only Transformers. Built to Perfection.

Distribution Transformers
[Standard]
Sungjin’s oil-immersed distribution transformers are designed and manufactured to meet diverse customer requirements, ensuring reliable performance and stable operation.
High Reliability
Our transformers achieve excellent reliability through optimized cooling systems and advanced insulation design, supported by electromagnetic analysis technology.
Compact Design
Coil configurations are optimized according to capacity, voltage, and application requirements. Conductor sizing is carefully determined to withstand electromagnetic forces during fault conditions while maintaining current-carrying capacity, temperature rise limits, and insulation performance.
Applicable Standard | IEC 60076, JEC 2200, KS C 4317 | ||||
Frequency | 50, 60Hz | ||||
Temperature rise | Oil | 60℃ | |||
Winding | 65℃ | ||||
BIL (kV) | System Voltage | 24 | 7.2 | 3.6 | 0.6 below |
Power frequency withstand voltage | 50 | 22 | 16 | 3 | |
Impulse Voltage | 150 | 60 | 40 | - | |
Primary voltage (kV) | 22.9 | 6.6 | 33.3 | 0.6 below | |
Tap voltage (kV) | F23.9-R22.9- | F6.9-R6.6-6.3- | F3.45-R3.3-3.15- | - | |
21.9-20.9-19.9 | 6.0-5.7 | 3.0-2.85 | |||
Secondary voltage (kV) | 6.6, 3.3, 0.48, 0.44, 0.38, 0.22w | ||||
Distribution Transformers
[Standard]
Sungjin’s oil-immersed distribution transformers are designed and manufactured to meet diverse customer requirements, ensuring reliable performance and stable operation.
High Reliability
Our transformers achieve excellent reliability through optimized cooling systems and advanced insulation design, supported by electromagnetic analysis technology.
Compact Design
Coil configurations are optimized according to capacity, voltage, and application requirements. Conductor sizing is carefully determined to withstand electromagnetic forces during fault conditions while maintaining current-carrying capacity, temperature rise limits, and insulation performance.
Applicable Standards | IEC 60076, JEC 2200, KS C 4317 | ||||
Frequency | 50 / 60 Hz | ||||
Temperature Rise | Oil | 60℃ | |||
Winding | 65℃ | ||||
Insulation Level (BIL) | System Voltage (kV) | 24 | 7.2 | 3.6 | ≤ 0.6 |
Power Frequency Withstand Voltage (kV) | 50 | 22 | 16 | 3 | |
Lightning Impulse Voltage (kV) | 150 | 60 | 40 | - | |
Primary Voltage (kV) | 22.9 / 6.6 / 3.3 / ≤ 0.6 | ||||
Tap Changer Range (kV) | 22.9 kV | 23.9 - 22.9 - 21.9 - 20.9 - 19.9 | |||
| 6.6 kV | 6.9 - 6.6 - 6.3 - 6.0 - 5.7 | ||||
| 3.3 kV | 3.45 - 3.3 - 3.15 - 3.0 - 2.85 | ||||
Secondary Voltage (kV) | 6.6 / 3.3 / 0.48 / 0.44 / 0.38 / 0.22 | ||||

Add. 344-21 Maebawi-ro, Jangan-myeon, Manse-gu, Hwaseong-si, Gyeonggi-do, Republic of Korea.
Tel. +82-31-355-9977
Fax. +82-31-356-1452
E-mail. sales@sjtr.co.kr
Copyright(C)SUNGJIN. All Rights Reserved.
Sungjin General Electric Co.,Ltd.
Add. 344-21 Maebawi-ro, Jangan-myeon, Hwaseong-si, Gyeonggi-do, Republic of Korea
Tel. +82-31-355-9977 | Fax. +82-31-356-1452 | E-mail. sales@sjtr.co.kr
Copyright(C)SUNGJIN. All Rights Reserved.
