Inductive Voltage Transformer Type PV
A solution for high accuracy measurement of your electric power grid
The PV voltage instrument transformers are used in electric Hitachi Energy with a system voltage of up to 123 kV and a frequency of 50 Hz.
This voltage transformer contains a high voltage coil, secondary windings and a core encapsulated in hermetic housing filled with PCB-free transformer oil.
The transformer’s stainless steel expansion bellows is fixed to the head and shielded with aluminum cover. The expansion bellows compensate for thermal changes in oil volume.
Applications
- Installed in grids with insulated or effectively earthed neutral point and in resonant earthed systems
- Revenue metering
- Control
- Indication
- Relay protection
Why Hitachi Energy?
Hitachi Energy has developed a state-of-the-art design to provide benefits to our users for better electrical performance, improved environmental withstand and a long trouble-free life. This is accomplished with:
- Low no-load losses due to use of oriented transformer steel
- Resistance to ferromagnetic resonance in broad capacity range
- Stable measuring accuracy during whole lifespan of the apparatus
- Excellent control of electric stresses that excludes possibility of primary insulation puncture
- Excellent insulation strength in transient conditions
- All parts made of non-corroding materials
- Maintenance free
- Short delivery times
- Lifespan of over 25 years.
General data of the Instrument Transformer
Type | PV123a |
---|---|
Compliance with Standards | IEC 61869-3; PN-EN 61869-3 |
Rated primary voltage | 110:√3 kV |
Highest system voltage | 123 kV |
Rated power – frequency withstand voltage | 230 kV |
Rated lightning – impulse withstand voltage 1.2 / 50 µs | 550 kV/ 60 s |
Minimum creepage distance | 16; 20; 25; 31 mm/kV |
Rated frequency | 50 Hz |
Total weight | 280; 220* kg |
Insulating oil weight [free] | 45 kg |
Ambient temperature | -40℃ to +40℃ |
Altitude | Max. 1000 m |
Humidity | up to 100% at 30℃ |
Internal partial discharges | below 10 pC at 1.2 Um according to IEC 60044-2 |
Dielectric loss factor | tan δ < 0.25% |
*composite insulator |
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