ABB ACS880 User Manual page 10

Safely-limited speed without the encoder interface (option +q966) for multidrives

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10 Safety instructions

Important! Repeat the measurement also with the DC voltage setting of the tester.

Measure between each phase and ground. There is a risk of dangerous DC voltage

charging due to leakage capacitances of the motor circuit. This voltage can remain

charged for a long time after the drive power-off. The measurement discharges the

voltage.

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Make sure that the voltage between the drive DC terminals (UDC+ and UDC-) and

the grounding (PE) terminal is zero. In cabinet-built drives, measure between the

drive DC busbars (+ and -) and the grounding (PE) busbar.

WARNING!

The busbars inside the cabinet of liquid-cooled drives are partially coated.

Measurements made through the coating are potentially unreliable, so only

measure at uncoated portions. Note that the coating does not constitute a safe

or touch-proof insulation.

Install temporary grounding as required by the local regulations.

Ask for a permit to work from the person in control of the electrical installation work.

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