Installation And Maintenance Work - ABB ACS800 Hardware Manual

6

Installation and maintenance work

These warnings are intended for all who work on the drive, motor cable or motor.
Ignoring the instructions can cause physical injury or death, or damage the
equipment.
WARNING!
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Safety instructions
Only qualified electricians are allowed to install and maintain the drive.
Before starting the work on any part of the drive, isolate it from the power line
with the main disconnecting device (main breaker or main switch-disconnector).
The main switch-disconnector or main breaker does not remove the voltage
from the input busbars of the drive.
Never work on the drive, the motor cable or the motor when main power is
applied. After switching off the input power, always wait for 5 minutes to let the
intermediate circuit capacitors discharge before you start working on the drive,
the motor or the motor cable. Measure the voltage between terminals UDC+
and UDC- (L+ and L–) with a multimeter (impedance at least 1 Mohm) to
ensure that the drive is discharged before beginning work.
Before working on any part of the drive, isolate its auxiliary circuits from the
power supply with the auxiliary voltage switch [Q10].
Apply temporary grounding before working on the unit.
Do not work on the control cables when power is applied to the drive or to the
external control circuits. Externally supplied control circuits may cause
dangerous voltages to exist inside the drive even when the main power of the
drive is switched off.
Do not make any insulation or voltage withstand tests on the drive or drive
modules.
When reconnecting the motor cable, always check that the phase order is
correct.
When joining shipping splits (if any), check the cable connections at the joints
before switching on the supply voltage.
Live parts on the inside of the doors are protected against direct contact.
Special attention shall be paid when handling metallic shrouds.
After maintaining or modifying a drive safety circuit or changing circuit boards
inside the module, retest the functioning of the safety circuit according to the
start-up instructions.
Do not change the electrical installations of the drive except for the essential
control and power connections. Changes may affect the safety performance or
operation of the drive unexpectedly. All customer-made changes are on the
customer's responsibility.