The JDC5-220 voltage transformer is a fully sealed series oil paper insulated single-phase three winding structure. The primary winding is divided into four groups, which are respectively mounted on the upper and lower columns of two frame type iron cores. The body of the winding is fixed on the base and immersed in the oil of the high-voltage porcelain box. The upper part of the porcelain box is equipped with an expander; The N terminal of the primary winding, the secondary winding, and the residual voltage winding are led out by a small porcelain sleeve on the base, which is equipped with an oil sample valve.
Main technical data of JDC5-220 high-voltage voltage transformer:
| Rated voltage (KV) |
Primary winding (AN) |
220/√3 |
| Secondary winding (AN) |
0.1/√3 |
| Remaining voltage winding (dadn) |
zero point one |
| Phase number, frequency (Hz) |
Single phase, 50 |
| Accuracy level and rated output (VA) of secondary winding cos Φ=0.8 |
zero point two |
one hundred and fifty |
| zero point five |
three hundred |
| one |
five hundred |
| 3P |
five hundred |
| Accuracy level and rated output (VA) of residual voltage winding |
3P level, 300 |
| Secondary winding limit output (VA) |
two thousand |
| Rated insulation level (KV) |
252/395/950 |
| Partial discharge level (PC) |
≤10 |


JDC5-220 High Voltage Voltage Transformer