ABB ACA 6 Series, Hardware Manual

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ACS 600 MultiDrive iii
Safety Instructions
Overview The complete safety instructions stated for ACS 600 MultiDrive in
Safety and Product Information must be followed when installing,
operating and servicing the frequency converters. Study the complete
safety instructions carefully.
General Safety
Instructions These general safety instructions include only main parts of the
complete safety instructions. The general safety instructions are
intended for all work on the ACS 600 MultiDrive (referred to as
ACx 600 in the text below). Neglecting these instructions may cause
physical injury or death.
WARNING! All electrical installation and maintenance work on the
ACx 600 should be carried out by qualified electricians.
Any installation work must be done with power off, and power is not to
be reconnected unless the installation work is complete. Dangerous
residual voltages remain in capacitors when the disconnecting device
is opened. Wait 5 minutes after switching off the supply before starting
work. Always ensure by measuring that the voltage between terminals
UDC+ and UDC- and frame is close to 0 V and that the supply has
been switched off before performing any work on the equipment or
making main circuit connections.
If the main circuit of the inverter unit is live, the motor terminals are also
live even if the motor is not running!
Open
switch fuses
of all
parallel connected inverters
before installation
or maintenance work in any of them.
Check the cable connections at the shipping split joints before
switching on the supply voltage.
If the auxiliary voltage circuit of the ACx 600 is powered from an
external power supply, opening the disconnecting device does not
remove all voltages. Control voltages of 115/230 VAC may be present
on the digital inputs or outputs even though the inverter unit is not
powered. Before starting work, check which circuits remain live after
opening of the disconnecting device by referring to the circuit diagrams
for your particular delivery. Ensure by measuring that the part of the
cabinet you are working on is not live.