Disconnecting And Temporary Grounding The Drive (Including The Input Power Terminals); Connecting The Drive / Supply Unit To The Power Line - ABB ACS880-207 Hardware Manual

4. Supply unit with the grounding switch ([Q9], option +F259): Switch the grounding switch
on.
WARNING!
Do not use excessive force. There is electromagnetic interlocking in use. See
section Electromagnetic interlocking (page
5. Switch off the auxiliary voltage by turning the auxiliary voltage switch [Q21] to the off
position.
6. Switch off the external auxiliary supply voltage (supply unit option +G307), and any other
dangerous voltage connected to the drive from outside.
7. Secure against reconnection: Lock the disconnectors and attach warning signs.
8. Wait for 5 minutes to let the drive DC link capacitors to discharge.
9. Open the door and ensure by measuring that the main circuit after the main
switch-disconnector/main circuit breaker [Q1] is not under voltage.
Supply unit without the grounding switch (no option +F259):
If temporary grounding is needed, connect a temporary grounding system to the main AC
busbars after the main switch-disconnector/main circuit breaker [Q1] and to the grounding
(PE) busbar of the drive. See the local regulations and EN 50110-1:2004.
WARNING! The input power busbars are under voltage. Keep the cabinet door
closed. Do not remove the shroud in front of input power busbars.
Disconnecting and temporary grounding the drive
(including the input power terminals)
1. Perform the tasks listed in section
the input power terminals), and temporary grounding (page
2. Switch off and disconnect the breaker of the supply transformer.
3. Secure against reconnection: Lock the disconnectors and attach warning signs.
4. Open the door of the supply unit and ensure by measuring that the input busbars are
not under voltage.
5. If temporary grounding of the input power terminals is needed, connect a temporary
grounding system to the input power terminals and to the grounding (PE) busbar of the
drive. See the local regulations and EN 50110-1:2004.

Connecting the drive / supply unit to the power line

This section describes how to re-connect the supply unit to the power line after a service,
etc. break. If you do the very first power line connection of the supply unit, obey the
instructions in section Start-up procedure (page 68)
WARNING!
The input power busbars are under voltage even when the drive main disconnecting
device [Q1] is open. Keep the cabinet door closed. Do not remove the shroud in
front of the busbars.
70).
Disconnecting the drive from AC power line (excluding
instead.
Start-up 71
70).
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