What Energy Reduction Maintenance Setting (ERMS) Function?

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The ERMS function is used to reduce the Ii protection settings in order to trip as fast as possible when a fault occurs. The pre-programmed factory setting for Ii protection in ERMS mode is 2xIn.

If any of the basic protection settings are changed using the rotary dials on the Micrologic control unit while in ERMS mode, the Micrologic control unit switches to the normal mode and then returns automatically to the ERMS mode after five seconds.