ABB ACS 600 Hardware Manual page 6

Safety Instructions
Installation and
Ã
Maintenance Safety
Supply Connections
iv ACx = ACS/ACC/ACP
These safety instructions are intended for all work on the ACx 604/607.
Neglecting these instructions can cause physical injury and death.
WARNING! All electrical installation and maintenance work on the
ACx 600 should be carried out by qualified electricians.
Do not attempt any work on a powered ACx 600. After switching off the
mains, always allow the intermediate circuit capacitors 5 minutes to
discharge before working on the frequency converter, the motor or the
motor cable. The voltage between each input terminal (U1, V1, W1)
and earth must be measured with a multimeter (impedance at least
1 MΩ) to ensure that the frequency converter is discharged before
beginning work.
All insulation tests must be carried out with the ACx 600 disconnected
from the cabling.
The ACx 600 motor cable terminals are at a dangerously high voltage
when input power is applied, regardless of motor operation. No work on
the motor cable should be attempted with mains power applied.
The brake control terminals (UDC+, UDC-, R+ and R- terminals) carry
a dangerous DC voltage (over 500 V).
There can be dangerous voltages inside the ACx 600 from external
control circuits when the ACx 600 input power is shut off. No work on
the control cables should be attempted when power is applied to the
frequency converter or to the external control circuits. Exercise
appropriate care when working with the unit.
ACx 607 units include an on-load isolating fuse switch with handle in
the front door. This fuse switch does not switch off the power from the
EMC Line Filter of ACS/ACC 607-0400-3, -0490-3/5/6, -0610-3/5/6 and
-0760-5/6 units. For ACS/ACC 607-0400-3, -0490-3/5/6, -0610-3/5/6
and -0760-5/6 units with EMC Line Filter, and for the ACx 604 module a
supply disconnecting device must be installed in the supply, by which
the electric parts of the unit can be separated from the mains (power)
network during installation and maintenance work. The supply
disconnecting device must be locked to the open position during
installation and maintenance work.
To meet the European Union Directives the isolator must be of a load
switch type according to EN 60947-3 Class B or of a type that switches
off the loaded circuit by means of an auxiliary contact opening the main
contacts of a switch.
ACS/ACC/ACP 604/607 Frequency Converters