ABB ACS880-07 Hardware

This alarm signal from the ground fault monitor (option +Q954) is explicitly recommended to be connected for immediate drive tripping upon detection of a ground fault in IT (ungrounded) systems. The contact is normally closed when no ground fault is present and has a load capacity of 250 V AC, 2 A. Be aware that the ground fault monitor performs self-testing, which might momentarily activate this signal, necessitating careful distinction between actual faults and test sequences.

This alarm signal from the ground fault monitor (option +Q954) is intended for general alarm indication purposes, rather than directly tripping the drive. The contact is normally closed when no ground fault is present and has a higher load capacity of 250 V AC, 8 A. It is crucial to understand that the monitor's internal self-testing might briefly activate this signal, requiring careful interpretation by any receiving alarm or monitoring system.