ABB ACS880-107

Electrical safety precautions
These electrical safety precautions are for all personnel who do work on the drive,
motor cable or motor.
This procedure gives information on how to de-energize the drive and make it safe to
do work on it. The procedure does not include all possible drive configurations. Each
drive is made to order. Always refer to the circuit diagrams of the drive delivery.
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. Prepare for the work.
• Make sure that you have a work order.
• Do an on-site risk assessment or job hazard analysis.
• Make sure that you have the correct tools available.
• Make sure that the workers are qualified.
• Select the correct personal protective equipment (PPE).
• Stop the motor(s).
2. Clearly identify the work location and equipment.
3. Disconnect all possible voltage sources. Make sure that re-connection is not
possible. Lock out and tag out.
• If the drive is equipped with a DC/DC converter unit or a DC feeder unit: Open
the disconnecting device of the energy storage connected to the unit. The
disconnecting device is outside the drive cabinet. Then open the DC
switch-disconnector ([Q11], option +F286 or +F290) of the unit.
• 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.
• Open the main isolating device of the drive.
• 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.
4. Protect other energized parts in the work location against contact and take special
precautions when close to bare conductors.
5. Measure that the installation is de-energized. Use a quality voltage tester. If the
measurement requires removal or disassembly of shrouding or other cabinet
44 Electrical installation