Equipment for Japanese MarketOil-Immersed Type Earthed Voltage Transformer (EVT)
Earthed voltage transformers, which transform high voltage into low and easy-to-handle voltage, are used in connection with a protective device and supply meter.
Feature
- The main insulation medium of these products is electrical insulation oil. (The Fire Service Act is applied.) We can fabricate these products in conformance with JIS C 1731, JIS C 1736, and JEC-1201 as well as some foreign standards.
10-154 kV earthed voltage transformers
These transformers are mainly used to measure the voltages between the ground and an electrical circuit and between the ground and a neutral point in an electrical circuit, as well as to detect zero-phase voltage in the event of a grounding fault of a three-phase circuit.
Single-phase
| Model | Rated voltage（V） | Accuracy class (Rated burden) | ||
|---|---|---|---|---|
| JEC-1201 | JIS C-1731, BS7625, IEC60044-2, IEC61869-3 |
IEEE/ANSI C57.13(60Hz) |
||
| EVO1-11 | 11000/√3 | 1P(50～500VA) | 0.5（50～200VA） 1.0（500VA） |
0.3(WXY) 0.6(Z) 1.2(ZZ) |
| EVO1-22 | 22000/√3 | |||
| EVO1-33 | 33000/√3 | |||
| EVO1-66 | 66000/√3 | |||
| EVO1-77 | 77000/√3 | |||
Three-phase
| Model | Rated voltage（V) | Accuracy class (Rated burden) | ||
|---|---|---|---|---|
| JEC-1201 | JIS C-1731, BS7625, IEC60044-2, IEC61869-3 |
IEEE/ANSI C57.13(60Hz) |
||
| EVDO1-11 | 11000/√3 | 1P(50～500VA) | 0.5（50～200VA） 1.0（500VA） |
0.3(WXY) 0.6(Z) 1.2(ZZ) |
| EVDO1-22 | 22000/√3 | |||
| EVDO1-33 | 33000/√3 | |||
| EVDO1-66 | 66000/√3 | |||
| EVDO1-77 | 77000/√3 | |||
(1) The standards other than IEEE/ANSI standards are based on the secondary voltage of 110 V and IEEE/ANSI standards are based on the secondary voltage of 120 V as standard.
(2) The tertiary voltage of 110/3 V, burden of 200 VA, and tertiary accuracy class of 3G are used as standard, and IEEE/ANSI standards are based on no tertiary voltage as standard.