ABB ACH580-01 Series, Hardware Manual

Page: 18 / 396

18 Safety instructions
Electrical safety in installation, start-up and maintenance

Precautions before electrical work
These warnings 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 electrical installation or maintenance work. Go through these
steps before you begin any installation or maintenance work.
1. Clearly identify the work location.
2. Disconnect all possible voltage sources. Lock and tag.
• Open the main disconnector at the power supply of the drive.
• Make sure that reconnection is not possible.
• Disconnect any external power sources from the control circuits.
• After you disconnect the drive, always wait for 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 multimeter with an impedance of at least 1 Mohm.
• Make sure that the voltage between the drive input power terminals (L1, L2,
L3) and the grounding terminal (PE) is close to 0 V.
• Make sure that the drive DC voltage is close to 0 V.
Frames R1…R3: Measure the voltage between the drive UDC+ terminal and
grounding terminal (PE) with one multimeter. As there is no UDC- terminal,
measure the voltage between the drive T1/U terminal and grounding terminal
(PE) with another multimeter. Make sure that the voltage difference between
the multimeters is close to 0 V.
Frames R4…R9: Measure the voltage between the drive DC terminals (UDC+
and UDC-) and the grounding terminal (PE) and make sure that it is close to
0 V.
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