ABB Advant Controller 80 User Manual page 5

General Safety
Instructions
AC 80 User's Manual
WARNING! All electrical installation and maintenance work on the
drive should be carried out by qualified electricians.
Any installation work must be done with the 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 that the measured 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!
If there are inverters in parallel, open the switch fuses of all parallel
connected inverters before installation or maintenance work on any of
them.
If the auxiliary voltage circuit of the drive 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.
Control boards of the drive may be at the main circuit potential.
Dangerous voltages may be present between the control cards and the
frame of the converter unit when the main circuit voltage is on. It is
critical that the use of measuring instruments, such as an oscilloscope,
and their connection to the drive is done with caution and safety always
a priority.
Live parts on the inside of doors are protected against direct contact.
Special safety attention shall be paid when handling shrouds made of
sheet metal.
Do not make any voltage withstand tests on any part of the unit while
the unit is connected. Disconnect motor cables before making any
measurements on motors or motor cables.
Do not open the drive section switch fuses when the inverter is running.
Safety Instructions
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