ExIS – NERPRO Relays – HV & 1000J
The ExIS NERPRO relays have a primary function of monitoring the Neutral Earthing Resistor, the Neutral Voltage, and the Earth Fault Current. The relay is accessed and controlled via a touch screen mounted on the inner door of the enclosure.
The NERPRO Nerm Panel is also capable of monitoring six user-defined digital inputs and storing these for future access. They are interrogated via the ‘Trip Log’ push button on the inner door, this is useful if power has been removed from the NERM panel, or directly from the touch screen if power is available. A second push button, the ‘NERM Test’ function checks the trip functionality of the NERPRO.
A third push button the ‘Earth Fault Test’ injects the necessary test current, again to check the functionality of the NERPRO Nerm Panel. Transformer temperature monitoring is achieved using a J-type thermal interface with adjustable temperature trip settings
DOWNLOAD PDFExtra Information
- Type 1000J – up to 1kV
- Type HV – 1kV to 11 kV
- Digital and analogue harmonic filtering
- Touch screen interface
- User-defined digital inputs
- User-defined analogue inputs
- Transformer temperature monitoring
- Time and date setting page
- Trip and alarm setting page
- Last trip page
- Trip log event page
- Edit input and trip page
General Specifications
- Supply 85-265Vac
- Two potential free contacts rated 250V 10A
- Fail-safe relay changeover from a trip to healthy
- Transformer temperature trip level adjustable
- NER trip level adjustable 0 – 1kΩ (1000J)
- NER trip time delay 10 seconds (1000J)
- NER trip level > 10kΩ (HV)
- NER trip time delay 6 seconds (HV)
- Neutral earth fault trip current adjustable 0-10A (1000J)
- Neutral earth fault trip current adjustable 1-25A (HV)
- Neutral earth fault trip time delay adjustable 0-10 Secs
- Neutral earth fault trip current < trip value
- Neutral voltage trip level 300Vac (1000J)
- Neutral voltage trip level > 2000Vac (HV)