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Ground fault protection class for the C441 overload relay

C441 are designed to the behavior specified in UL 1053 Class 1. 

Class I: Devices trips on GF regardless of level once it passes the level and time delay threshold

Class II: Device will inhibit a trip if the monitored GF level is too high (higher than breaking capacity of contactor)

Both C440/C441 fall into Class I behavior