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RCMS460 & RCMS490 Series
Earth Leakage Relay

The RCMS460 and RCMS490 monitor for ground faults in multiple grounded and high-resistance grounded AC, DC, and AC/DC systems. 

Details

The RCMS460 and RCMS490 are specifically de-signed to provide advanced warning of developing ground faults without the problems associated with high sensitivity nuisance tripping. Each RCMS device can monitor up to 12 circuits. Each channel can be separately adjusted to whether it is monitoring pure AC, pure DC, or mixed AC/DC. Setpoints are also separately adjustable on each channel. AC systems up to 2000 Hz can be monitored. Values are read as true RMS values.