Main Switch Incl. Fuses Or Circuit Breaker (Option L26) - Siemens SINAMICS G150 Operating Instructions Manual

Electrical installation
4.11 Other connections
Replacement of the surge arresters
In the event of a fault, the surge arresters must be replaced:
● Cabinet units 3 AC 380 - 480 V:
● Cabinet units 3 AC 500 - 600 V and 3 AC 660 - 690 V:
4.11.8

Main switch incl. fuses or circuit breaker (option L26)

Description
For rated currents up to 800 A (single units) and up to 1380 A (units that are connected in
parallel), a switch disconnector with externally-mounted fuses is used as the main circuit
breaker. For rated currents above 800 A (single units) and above 1380 A (units that are
connected in parallel), the standard circuit breaker is used to disconnect the voltage and
provide overload and short-circuit protection. The circuit breaker is controlled and supplied
within the converter.
Switching at input
Cabinet units with circuit breaker may be powered up only once every 3 minutes. Failure to
observe this rule can cause damage to the cabinet unit.
Connecting
Table 4- 41
Terminal
1)
Max. connectable cross-section: 4 mm²
132
Remove the insert (protection module) by withdrawing the defective insert and inserting
the replacement part.
Replacing the complete surge arrester.
CAUTION
Terminal block X50 – checkback contact "main/circuit breaker closed"
Designation
1 NO
2 NC
3 COM
NO: normally-open contact, NC: normally-closed contact, COM: mid-position contact
1)
Max. switching voltage: 250 V AC
Max. switching capacity: 250 VA
Required minimum load: ≥ 1mA
Technical data
Max. load current: 10 A
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A