ABB ACS800 Multidrive Hardware-Handbuch - Seite 11
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Miscellaneous
Details of the locking solenoid control
The switch fuse locking is released by the locking solenoid when:
• Switch fuse handle in 1 (on) position. (ASFC monitors an auxiliary contact.)
• DC voltage of all inverter modules monitored by the ASFC unit exceed 80% of the
nominal value. (ASFC receives UDC signals from inverters.)
• At least one of the inverter module enabled/disabled switches (S1...S3) is in
enabled position.
When all conditions are met simultaneously, a relay included in the ASFC connects
the operating voltage to the solenoid for 3.5 seconds.
Switch fuse operation when the drive DC bus is not live
If the handle of the switch fuse is turned to 1 (on) position when the DC busbar of the
inverter system is unpowered, the spring-operated main contacts remain open.
Later, when the drive supply unit is switched ON, the power-on sequence follows the
routine described in section
Inverter power switch-on sequence
11
on page 10.
Hardware description