ABB ACS880-0500-3, Hardware Manual

Page: 38 / 88

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 electrician, do not do installation
or maintenance work. Go through these steps before you begin any installation or
maintenance work.
1. Keep the cabinet doors closed when the drive is powered. With the doors open, a risk
of a potentially fatal electric shock, arc flash or high-energy arc blast exists.
2. Clearly identify the work location and equipment.
3. Disconnect all possible voltage sources. Lock and tag.
• Open the main disconnecting device of the drive.
• Open the charging switch if present.
• Open the disconnector of the supply transformer. (The main disconnecting device
in the drive cabinet does not disconnect the voltage from the AC input power busbars
of the drive cabinet.)
• Open the auxiliary voltage switch-disconnector (if present), and all other possible
disconnecting devices that isolate the drive from dangerous voltage sources.
• 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.
• Make sure that re-connection is not possible. Lock the disconnectors to open position
and attach a warning notice to them.
• Disconnect any external power sources from the control circuits.
• After you disconnect the drive, always wait 5 minutes to let the intermediate circuit
capacitors discharge before you continue.
4. Protect any other energized parts in the work location against contact.
5. Take special precautions when close to bare conductors.
6. Measure that the installation is de-energized. If the measurement requires removal or
disassembly of shrouding or other cabinet structures, obey the local laws and regulations
applicable to live working (including – but not limited to – electric shock and arc
protection).
• Use a multimeter with an impedance of at least 1 Mohm.
• Make sure that the voltage between the drive input power terminals and the
grounding (PE) busbar is close to 0 V.
• Make sure that the voltage between the drive DC busbars (+ and -) and the
grounding (PE) busbar is close to 0 V.
• If you have a permanent magnet motor connected to the drive, make sure that the
voltage between the drive output terminals and the grounding (PE) busbar is close
to 0 V.
7. Install temporary grounding as required by the local regulations.
8. Ask the person in control of the electrical installation work for a permit to work.
38 Electrical installation