ExIS – NERPRO NERM Panel – HV
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. Transformer temperature monitoring is achieved using a J-type thermal interface with adjustable temperature trip settings
DOWNLOAD PDFExtra Information On The NERPRO nerm panel
- Up to 11kV.
- Lockable double door layout providing tamper-proof test buttons and touch screen.
- 100kΩ 1kW (11kV unit) sensing resistor fitted in top enclosure.
- Powder coated in mild steel or stainless steel.
- Robust in construction and easily retrofittable with older versions.
- Digital and Analogue harmonic filters included guarantee accurate operating values.
- Transformer temperature monitoring
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 > 10kΩ
- NER trip time delay 6 seconds
- Neutral earth fault trip current adjustable 0-25A
- Neutral earth fault trip time delay adjustable 0-10 Secs
- Neutral earth fault trip current < trip value
- Neutral voltage trip level > 2000Vac