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.
WARNING!
• Only qualified electricians are allowed to install and maintain the drive.
• Never work on the drive, motor cable or motor when main power is applied.
After switching off the 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.
Always ensure by measuring with a multimeter (impedance at least 1 Mohm)
that:
1. Voltage between drive input phases L1, L2 and L3 and the frame is close to
2. Voltage between terminals UDC+ and UDC- and the frame is close to 0 V.
• 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 or voltage withstand tests on the drive or drive
modules.
• When reconnecting the motor cable, always check that the phase order is
correct.
Note:
• The disconnecting device (means) of the drive does not isolate the input cables
and busbars from the main AC supply. Before working inside the cabinet,
isolate the input cables and busbars from the main supply with the
disconnecting device at the distribution board or with the disconnector of the
supply transformer.
• 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.
•
The Prevention of Unexpected Start function does not remove the voltage from
the main and auxiliary circuits.
Safety Instructions
0 V.