Voltage Transformer TVI (72.5 - 420 kV)
Gas-insulated instrument transformer for enhanced safety and reliability
TVI is a SF6 gas-insulated Inductive Voltage Transformer built for revenue metering and protection in high voltage networks. The TVI has been designed for voltage up to 420 kV.
- Suitable for both metering and protection
- Magnetic cores made of laminated steel with oriented grain and a high level of permeability
- Windings made of electrolytic copper
- Safety margin for normal wind loads, stress from conductors and seismic forces
- Remote control of the internal insulation level by means of pressure gauge provided with an alarm threshold and lock threshold
- A pressure relief device protects the apparatus from internal overpressure
Applications
- Revenue metering
- Protective relaying
- System control and indication of power flow
Why Hitachi Energy?
The TVI, thanks to the use of SF6 gas and of a composite insulator, offers several advantages:
- Explosion proof design
- Available with a gas-insulated disconnector for increased flexibility during operation
- Absence of partial discharge
- Dielectric mean not subjected to aging
- Higher performance in very heavy polluted environments
- Maintenance free
- Life cycle of 30 years
Brief performance data
| TVI | |
|---|---|
| Installation | Outdoor |
| Design | Self-standing lower core |
| Insulation | SF6 gas |
| Highest voltage for equipment | 72.5 - 420 kV |
| Power frequency withstand voltage | Up to 630 kV |
| Lightning impulse withstand voltage | Up to 1.425 kV |
| Insulators | Composite |
| Ambient temperature | -50 ºC to +40 ºC (Standard) |
| Pollution level | IV (Very Heavy) |
| Accuracy | Meets all IEC and IEEE metering and protection classes |
Related offering
Something caught your eye?
Our sales team will get in touch with you