Electrical Safety In Installation, Start-Up And Maintenance; Precautions Before Electrical Work - ABB ACS880-07 Hardware Manual

18 Safety instructions
Note:
•
If you select an external source for start command and it is on, the drive will start
immediately after fault reset unless you configure the drive for pulse start. See the
firmware manual.
•
When the control location is not set to Local, the stop key on the control panel will not
stop the drive.
•
Only authorized persons are allowed to repair a malfunctioning drive.

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 electrician, do not
do 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.
•
Open the main switch-disconnector (Q1) of the drive.
•
Open the disconnector of the supply transformer as the main switch-disconnector
(Q1) of the drive does not remove the voltage from the input busbars of the drive.
•
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 from the control circuits before you do
work on the control cables.
•
After you disconnect the drive, always wait 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 (PE) busbar is close to 0 V. Measuring holes of the standard
drive in the shroud are shown below.