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

-X70 - "Grounding switch upstream of internal main breaker" terminal block
Table 8- 29
Terminal
1
2
3
4
5
6
7
8
1)
8.24.2

Grounding switch downstream of main breaker (option L47)

The grounding switch downstream of the internal main breaker shorts the supply network to
ground.
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.
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A
8.24 L46/L47, grounding switch upstream/downstream of main breaker
Terminal block -X70 – "Grounding switch upstream of internal main breaker"
Designation
1)
L1
N
NC
NO
COM
NC
NO
COM
NC: normally-closed contact, NO: normally-open contact, COM: mid-position contact,
max. connectable cross section: 2.5 mm²
DANGER
Technical specifications
Grounding switch enable
230 V AC/0.1 A
"Interruption of higher-level switches" checkback signal
Leading contact
Max. load current: 3 A
Max. switching voltage: 250 V AC
"Switch actuated" checkback
Max. load current: 3 A
Max. switching voltage: 250 V AC
Options
399