The RI-ELR20 Series are fixed trip level Earth Leakage relays. The Series is available with trip levels preset to 30mA, 100mA, or 300mA.
Designed to detect low-level leakage currents and to operate a contact if the leakage current exceeds the selected trip level. All phase conductors of the circuit being monitored are passed through the aperture of an RI-CBCT core balance transformer. The transformer output is connected to the relay which monitors the proportional leakage current.
An LED chain on the front of the relay provides a visual indication of leakage current, along with power status and trip indication.
A single change over contact is provided for alarm indication.
Parameters
- Preset trip level to 30mA, 100mA or 300mA
- Test/reset facility:-
1. Front panel push button
2. Remote through normally open push button contact
3. By removal and re-applying auxiliary supply
Note: The relay will remain in trip state until reset as above
- Standard Type A to IEC/EN60947-2
- Response time:-
<30mS if leakage current ≥ 5 x I∆n
<50mS if leakage current ≥ 1 x I∆n
