1. DESCRIPTION
MK231A Earth-fault Relay User's Guide
The MK231A is a microprocessor based numerical earth-fault relay. It uses fundamental frequency
The 4-digit panel display on the
MK231A allows the display of present load current; recorded fault current for last tripping; and all
setting of the relay.
start/
start/
current measurement for excellent harmonic current rejection. The relay provides two- element (low-set
and high-set) earth-fault protection with definite time characteristic.
