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20 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.
•
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.
6.
If the drive is not equipped with a grounding switch, 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.
Additional instructions and notes
￭
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.
•
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.
•
Make sure that the electrical power network, motor/generator, and environmental
conditions agree with the drive data.
•
Do not do insulation or voltage withstand tests on the drive.
•
If you have a cardiac pacemaker or other electronic medical device, keep away from
the area near motor, drive, and the drive power cabling when the drive is in operation.
There are electromagnetic fields present which can interfere with the function of such
devices. This can cause a health hazard.
•
ABB does not recommend attaching the cabinet by arc welding. If you have to, obey
the welding instructions in the drive manuals.
Note:
•
When the drive is connected to the input power, the motor cable terminals and the DC
bus are at a dangerous voltage.
The brake circuit, including the brake chopper (option +D150) and brake resistor (option
+D151) are also at a dangerous voltage.
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