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96 Electrical installation
Related documents
For more information on cable selection, protections, etc., see Electrical planning
instructions for ACS880 multidrive cabinets and modules (3AUA0000102324 [English]).
You can find more support material on the Internet. Go to:
https://www151.abb.com/spaces/lvacdrivesengineeringsupport/content.
Basic electrical safety precautions
WARNING! Perform the electrical safety precautions below before starting any
work on the installation. If you ignore the precautions, physical injury or death, or
damage to the equipment can occur. Only a qualified electrician is allowed to work
on the installation.
1. Clearly identify the work location.
2. Disconnect the circuit to be worked on completely. After disconnection, always wait for
5 minutes to let the capacitors to discharge.
Note: Identify all possible power sources. Note that the input power busbars are under
voltage even though the main switch-disconnector [Q1] is open.
Note: In some 12-pulse supply units, there are two separate main switch-
disconnectors [Q1.1 and Q1.2], one for each input power connection point. You must
open both disconnectors to disconnect the supply unit completely from the power line.
See the circuit diagrams of the drive.
3. Secure against re-connection. Lock the disconnectors and attach warning notices.
4. Provide protection against adjacent live parts.
5. Verify by measuring that there is no voltage present.
6. Carry out grounding and short-circuiting when necessary. Refer to local regulations
and EN 50110-1: 2004.
7. Ask for a work permit. Only the nominated person in control of the electrical installation
work is allowed to issue the work permit.
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