Equipment for Japanese MarketGas-insulated 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 is SF6gas. We can fabricate these products in conformance with JIS C 1731, JIS C 1736, JEC-1201, and IEC 61869-3 as well as some foreign standards.
60-500 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.
Feature
As an option, a device that disconnects an EVT from the main circuit can be incorporated.
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) | ||
| VGT4-66 | 66000/√3 | 1P(50～500VA) | 0.5（50～200VA） 1.0（500VA） |
0.3(WXY) 0.6(Z) 1.2(ZZ) |
| VGT4-77 | 77000/√3 | |||
| VGV4-110 | 110000/√3 | 0.2(50～100VA) 0.5（200VA） 1.0（500VA） |
||
| VGV4-132 | 132000/√3 | |||
| VGW4-154 | 154000/√3 | |||
| VGX4-220 | 220000/√3 | |||
| VGX4-275 | 275000/√3 | |||
| VGY2-345 | 345000/√3 | |||
| VGZ1-500 | 500000/√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) | ||
| VDGT4-66 | 66000/√3 | 1P(50～500VA) | 0.5（50～200VA） 1.0（500VA） |
0.3(WXY) 0.6(Z) 1.2(ZZ) |
| VDGT4-77 | 77000/√3 | |||
| VDGV4-110 | 110000/√3 | 0.2(50～100VA) 0.5（200VA） 1.0（500VA） |
||
| VDGV4-132 | 132000/√3 | |||
| VDGW4-154 | 154000/√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.