ABB ACS880-07 Series - Wiring Ground Fault Monitoring for IT Ungrounded Systems (Option +Q954); Setting the Voltage Range of the Auxiliary Control Voltage Transformer (T21)

Wiring ground fault monitoring for IT ungrounded systems (option +Q954)
We recommend to connect Alarm 1 for drive tripping and Alarm 2 for alarm signals in order
to avoid unnecessary trippings due to the ground fault monitor self testing with Alarm 2.
Electrical installation 105
Wiring ground fault monitoring for IT ungrounded systems (option +Q954)
We recommend to connect Alarm 1 for drive tripping and Alarm 2 for alarm signals in order
to avoid unnecessary trippings due to the ground fault monitor self testing with Alarm 2.
1
2
3
4
X954
1 Internal wiring: Ground fault alarm 1. No
ground fault = contact closed. Contact load
capacity 250 V AC 2 A.
2 Internal wiring: Ground fault alarm 2: No
ground fault = contact closed. Contact load
capacity 250 V AC 8 A.
1
2
Alarm 1
Alarm 2
Internal wiring: Ground fault alarm 1. No ground fault =
contact closed. Contact load capacity 250 V AC 2 A.
1
Internal wiring: Ground fault alarm 2: No ground fault =
contact closed. Contact load capacity 250 V AC 8 A.
2
Setting the voltage range of the auxiliary control voltage transformer (T21)
Connect the power supply wires of the auxiliary control voltage transformer according to
the power network voltage.
132 Electrical installation