Installation And Maintenance Work - ABB ACS800-U4 Hardware Manual

12

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.
Only qualified electricians are allowed to install and maintain the drive.
•
•
•
•
Note:
•
•
•
•
WARNING! The printed circuit boards contain components sensitive to electrostatic
discharge. Wear a grounding wrist band when handling the boards. Do not touch the
boards unnecessarily.
Safety instructions
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 min 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- with a multimeter (impedance at least 1 Mohm) to ensure that the
drive is discharged before beginning work.
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 inside the drive even when the main power on the drive is
switched off.
Do not make any insulation tests without disconnecting the drive from the
cabling.
When reconnecting the motor cable, always check that the phase order is
correct.
The motor cable terminals on the drive are at a dangerously high voltage when
the input power is on, regardless of whether the motor is running or not.
The brake control terminals (UDC+, UDC-, R+ and R- terminals) carry a
dangerous DC voltage (over 500 V).
Depending on the external wiring, dangerous voltages [115 V, 220 V or 230 V]
may be present on the terminals of relay outputs RO1 to RO3.
ACS800-04: the busbar ends on both sides of the pedestal are at a
dangerously high voltage when the input power is on, regardless of whether the
motor is running or not.