Siemens UL 489 - Page 147

9 – 45
Module GFM A 745
- Alarm only, circuit breaker does not trip
- The changeover switch for ground-fault detection is only accessible when the control panel or the trip unit itself is removed.
Module GFM AT 745
- Ground-fault protection by circuit breaker tripping and alarm signal
- Changeover switch for ground-fault protection accessible only when the control panel or the trip unit itself is removed
Rotary switch for ground-fault
alarm setting value
Ground-fault alarm indicator
Rotary switch for ground-fault
delay setting t
g
/ I
2
t
g
Changeover switch for ground-fault
detection
Rotary switch for ground-fault
protection setting value
Rotary switch for ground-fault
alarm setting value
Indicators
ground-fault alarm
ground-fault tripped
Rotary switch for ground-fault
delay setting t
g
/ I
2
t
g
Changeover switch for ground-fault
detection