Alarms

An alarm may be viewed using:

• The Alarm history menu.

• The COM communications option.

The commands in the Protection menu are used to attribute a specific operating mode to each of the protection functions:

• OFF: protection disabled

• Alarm: the function issues an alarm, but does not trip the circuit breaker.

• Trip + Alarm: the function issues an alarm and trips the circuit breaker.

The protection functions against overloads (long time), short circuits (short time and instantaneous) and ground faults (ground-fault and earth-leakage currents) automatically result in tripping and cannot be deactivated (Trip mode only).

The IAlarm and phase rotation alarms can be set exclusively to OFF or Alarm mode.

The other protection functions for current, voltage, power and frequency may be set to any of the three modes, OFF, Alarm or Trip + Alarm.

The load shedding and reconnection function may be set to ON or OFF.

Current protection	Off	Alarm	Trip + Alarm
I Alarm	✔	✔	–
I unbal	✔	✔	✔
I1	✔	✔	✔
I2	✔	✔	✔
I3	✔	✔	✔
IN	✔	✔	✔
Voltage protection	Off	Alarm	Trip + Alarm
U min	✔	✔	✔
U max	✔	✔	✔
U unbal	✔	✔	✔
Other protection	Off	Alarm	Trip + Alarm
rP max	✔	✔	✔
F min	✔	✔	✔
F max	✔	✔	✔
Phase rotation	✔	✔	–
Shedding/reconnection	Off	On	–
Current I	✔	✔	–
Power P	✔	✔	–

The resettable alarms linked to device tripping are activated when the Ir, Isd/Ii or I thresholds are overrun.

The Ir alarm is reset one second after tripping. The Isd/Ii and alarms are reset by pressing the button.

Delayed alarms are activated when the pickup and dropout thresholds are overrun and the corresponding time delays have expired.

Identical pickup and dropout thresholds

Different pickup and dropout thresholds

History logging

• Alarm mode: as soon as a given protection threshold is overrun, an alarm is recorded in the Alarm history

• Trip mode: as soon as a given protection threshold is overrun, the circuit breaker trips and the fault is recorded in the Trip history.

The Protection setup menu under History, maintenance and setup is used to enable or disable the Trip mode that is displayed in the protection-setting screens. On leaving the factory, the protection functions are set to Alarm mode.