Electrical Safety In Installation, Start-Up And Maintenance; Electrical Safety Precautions - ABB ACS560 Hardware Manual

18 Safety instructions

Electrical safety in installation, start-up and maintenance

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Electrical safety precautions

These electrical safety precautions are for all personnel who do work on the drive,
motor cable or motor.
WARNING!
Obey these instructions. If you ignore them, injury or death, or damage to
the equipment can occur.
If you are not a qualified electrical professional, do not do installation or
maintenance work.
Do these steps before you begin any installation or maintenance work.
1. Clearly identify the work location and equipment.
2. Disconnect all possible voltage sources. Make sure that re-connection is not
possible. Lock out and tag out.
• Open the main disconnecting device of the drive.
• If you have a permanent magnet motor connected to the drive, disconnect
the motor from the drive with a safety switch or by other means.
• Disconnect all dangerous external voltages from the control circuits.
• After you disconnect power from the drive, always wait 5 minutes to let
the intermediate circuit capacitors discharge before you continue.
3. Protect any other energized parts in the work location against contact.
4. Take special precautions when close to bare conductors.
5. Measure that the installation is de-energized. Use a quality voltage tester.
• Before and after you measure the installation, verify the operation of the
voltage tester on a known voltage source.
• Make sure that the voltage between the drive input power terminals (L1,
L2, L3) and the grounding (PE) busbar is zero.
• Make sure that the voltage between the drive output terminals (T1/U, T2/V,
T3/W) and the grounding (PE) busbar is zero.
• Make sure that the voltage between the drive DC terminals (UDC+ and
UDC-) and the grounding (PE) terminal is zero.
Note: If cables are not connected to the drive DC terminals, measuring the
voltage from the DC terminal screws can give incorrect results.
6. Install temporary grounding as required by the local regulations.
7. Ask for a permit to work from the person in control of the electrical installation
work.