ABB ACS880-04F, Hardware Manual, Page: 15 / 172

Safety instructions 15
•
The maximum number of drive power-ups is five in ten minutes. Too frequent power-
ups can damage the charging circuit of the DC capacitors.
•
Make sure that any safety circuits (for example, emergency stop and Safe torque off)
are validated in start-up. See chapter
Start-up for reference of the validation
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.
Electrical safety in installation, start-up and maintenance

Precautions before electrical work
These warnings are for all personnel that 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 disconnector of the drive.
•
Open the disconnector of the supply transformer as the main disconnector 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 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 module input power terminals
(L1/U1, L2/V1, L3/W1) and the grounding (PE) busbar is close to 0 V.
•
Make sure that the voltage between the drive module UDC+ and UDC- terminals
and the grounding (PE) busbar 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.