ABB ACS 600 MultiDrive, Hardware Manual

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ACS/ACC/ACP 604/607 Frequency Converters 3-1
Chapter 3 – Electrical Installation
WARNING! The electrical installation described in this chapter should
only be carried out by a qualified electrician. The
Safety Instructions on
the first pages of this manual must be followed. Negligence of these
instructions can cause injury or death.
Insulation Checks
Every ACx 600 unit has been tested for insulation between main circuit
and chassis (2500 V rms 50 Hz for 1 second) at the factory. Therefore
there is no need to check the insulation on the unit again. When
checking the insulation of the assembly, proceed in the following
manner:
WARNING! Insulation checks must be performed before connecting
the ACx 600 to the mains. Before proceeding with the insulation
resistance measurements make sure that the ACx 600 is disconnected
from the mains.
1. Check that the motor cable is disconnected from the ACx 600
output terminals U2, V2 and W2.
2. Measure the insulation resistances of motor cable and the motor
between each phase and Protective Earth with measuring voltage
1 kV d.c. The insulation resistance must be greater than 1 M
Ω
.
Mains Fuses Fuses are needed to protect the input bridge of the ACx 600 in case of
an internal short circuit. The ACx 607 is equipped with internal input
fuses introduced in
Appendix A. The ACx 604 is not equipped with
input fuses. When installing the ACx 604, you must always connect the
supply via ultrarapid fuses given in
Appendix A.
If a fuse is blown, it must not be replaced with a normal slow fuse rated
according to
Appendix A. An ultrarapid fuse must be used.
The ACx 600 protects the input and motor cables from overload when
the cables are dimensioned according to the nominal current of
ACx 600. When the ultrarapid fuses of ACx 604 are placed at the
distribution board, they protect the input cable in case of a short circuit.
PE
Ω
M