Siemens UL 1066 - Page 126

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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
Module GFM A 776
- Alarm only, circuit breaker does not trip
- Module programmable via:
- the graphical display (ETU776)
- the BDA (ETU776)
-the PROFIBUS-DP (ETU776)
- the MODBUS (ETU776).
Module GFM AT 776
- Ground-fault protection by circuit breaker tripping and alarm signal
- Module programmable via:
- the graphical display (ETU776)
- the BDA (ETU776)
-the PROFIBUS-DP (ETU776).
- the MODBUS (ETU776).
- Ground-fault detection selectable:
- vectorial summation  I = L1+L2+L3+N
- external iron core ground-fault current sensor 1200 A : 1 A
Rotary coding switch for ground-fault
protection setting value
Rotary coding switch for ground-fault
alarm setting value
Indicators
ground-fault alarm
ground-fault tripped
Rotary coding switch for ground-fault
delay setting t
g
/ I
2
t
g
Changeover switch for ground-fault
detection
Ground-fault detection mode
Labeling areas for recording
setting values
Labeling areas for recording
setting values
Ground-fault alarm indicator
Ground-fault detection mode
Labeling areas for recording
setting values
Indicators
G ALARM
G tripped
Labeling areas for recording
setting values