128 Electrical installation
Electrical safety precautions
This information is for all personnel who do work on ACS880-04.
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 covers/doors closed during the operation and when voltage is connected.
2. Clearly identify the work location.
3. Disconnect all possible voltage sources.
• Open the main switch-disconnector [Q1], or rack out the main circuit breaker [Q1]
(whichever is present).
• Open the disconnector of the supply transformer as the main disconnecting device
of the drive does not remove the voltage from the input busbars of the drive or
from the voltmeter, if present.
• 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.
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.
7. Install temporary grounding as required by the local regulations. Close the grounding
switch [Q9], if present.
8. Ask for a permit to work from the person in control of the electrical installation work.
General notes
Static electricity
WARNING! Circuit boards contain components sensitive to electrostatic
discharge (ESD). Wear a grounding wrist band when handling the boards. Do not
touch the boards unnecessarily.
Optical components
Handle fiber optic cables with care. When unplugging optic cables, always grab the
connector, not the cable itself. Do not touch the ends of the fibers with bare hands as the
fiber is extremely sensitive to dirt.
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