Current Transformers Type PA
A solution for high accuracy measurement of your electric power grid
The PA current transformers are used in electric Hitachi Energy with a system voltage of up to 145 kV and a frequency of 50 Hz.
They are designed using top core current transformer construction. The active elements are located in a hermetic housing inside the head of the transformer. PA current transformers are filled with PCB-free transformer oil.
Top core construction makes it possible to achieve high values of thermal and dynamic short-circuit currents, as well as a broad range of rated primary currents and secondary output windings.
Applications
- 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:
- Very low electric energy losses
- Stable measuring accuracy during whole lifespan of the apparatus
- No active parts in insulator
- 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 dates
- Long lifespan of over 25 years
General data of the Instrument Transformer
| Parameter | Value | |
|---|---|---|
| Type | PA123a | PA145a |
| Compliance with Standards | IEC 61869-2, PN-EN 61869-2 | |
| Highest system voltage | 123 kV | 145 kV |
| Rated power – frequency withstand voltage at 50 Hz | 230 kV / 60 s | 275 kV / 60 s |
| f = 50 Hz | f = 50 Hz | |
| Rated lightning – impulse withstand voltage 1.2 / 50 µs | 550 kV | 650 kV |
| Minimum creepage distance | 16; 20; 25; 31 mm/kV | |
| Rated frequency | 50 Hz | |
| Total weight | 420; 360* kg | |
| Insulating oil weight [free] | 85 kg | |
| Ambient temperature | -40oC to +40oC | |
| Altitude | Max. 1000 m | |
| Humidity | up to 100% at 30oC | |
| Internal partial discharges | below 10 pC at 1.2 Um according to IEC 60044-1 | |
| Dielectric loss factor | tan δ < 0.25% | |
| *composite insulator | ||
Related offering
Something caught your eye?
Our sales team will get in touch with you