Electrical Safety In Installation, Start-Up And Maintenance; Electrical Safety Precautions - ABB ACS880-37 Hardware Manual

Electrical safety in installation, start-up and maintenance

Electrical safety precautions


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 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.
3. Disconnect all possible voltage sources.
•
Open the main switch-disconnector [Q1.1] or breaker [Q1] of the drive.
•
Open the disconnector of the supply transformer as the main switch-disconnector
or breaker of the drive does not remove the voltage from the input busbars of the
drive or from the voltmeter (option +G334).
•
Make sure that reconnection is not possible. Lock the disconnectors to open
position and attach a warning notice to them.
•
Disconnect any external power sources (eg. UPS, motor fan supply, or cubicle
heater supply) from the control circuits before you do work on the control cables.
•
After you disconnect the drive, always wait for 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.
•
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.
WARNING! 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).
7. Install temporary grounding as required by the local regulations. Close the grounding
switch (option +F259, Q9) if present.
8. Ask the person in control of the electrical installation work for a permit to work.
Safety instructions 19