Grounding Switch Downstream Of Main Breaker (Option L47) - Siemens SINAMICS S120 Manual

Options
8.36 L46/L47, grounding switch upstream/downstream of main breaker
8.36.2

Grounding switch downstream of main breaker (option L47)

The grounding switch downstream of the internal main breaker shorts the supply network to
ground.
Measures required when closing the grounding switch with the voltage available
In this case, the grounding switch and the main breaker of the Line Connection Module are
interlocked electrically. This ensures that when the main breaker is closed, it is opened
again when the grounding switch is switched on.
If the grounding switch is engaged, it is interlocked to ensure that the main breaker cannot
be switched in.
X71 terminal block "Grounding switch downstream of internal main breaker"
Table 8- 60
Terminal
1
2
3
4
5
6
7
8
Max. connectable cross-section: 2.5 mm²
1)
500
DANGER
Terminal block X71
Designation
L1
N
NC (reserved, do not use)
NC (reserved, do not use)
COM (reserved, do not use)
NC
NO
COM
NC: Normally-closed contact, NO: Normally-open contact, COM: Center contact
Technical data
1)
Grounding switch enable
230 V AC / 0.1 A
Circuit breaker interlock
("Grounding switch open")
"Switch actuated" checkback signal
Max. load current: 3 A
Max. switching voltage: 250 V AC
Cabinet Modules
Manual, 03/2013, A5E03263538A