ABB ACS880-1604, Hardware Manual

Page: 66 / 222

66 Electrical installation
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Electrical safety precautions
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 all energy storage disconnectors (customer-installed device).
•
Open the DC switch/disconnector [Q11]) of each DC/DC converter. See
Disconnecting the DC/DC converter with DC switch/disconnector on page 87 .
•
Note: If you have a DC/DC converter unit with parallel-connected converter
modules, and/or if you have parallel-connected energy storages (for example,
multiple batteries connected in parallel), open the disconnectors of both the
converter modules and all disconnectors of the energy storage modules.
•
Open the main switch/disconnector [Q1], or rack out the main breaker [Q1] of the
drive (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.