Chapter 3 – Electrical Installation
3-2 ACx=ACS/ACC/ACP ACS/ACC/ACP 604/607 Drives
Disconnecting Means
ACx 607 units include a door interlocked fused disconnect. This 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 an input power
disconnecting means must be installed between the ac power source
and the ac drive. The disconnecting means must conform to applicable
safety regulations. The disconnecting means must be locked to the
open position during installation and maintenance work.
The motor must not be controlled with the supply disconnecting means;
instead, the and keys of the Control Panel or commands via the
I/O board of the ACx 600 should be used. The maximum number of
charging cycles of the d.c. capacitors of ACx 600 (i.e. power-ups by
applying power) is five in ten minutes.
The drive disconnecting means can serve as the motor disconnecting
means if it complies with applicable safety regulations.
Input Line Fuses
Input line Fuses are required to protect the input bridge of the ACx 600
in the event of an internal short circuit or ground fault. The ACx 607 is
equipped with internal input fuses listed on page A-3 in
Appendix A
.
Fuses are not included in the ACx 604 and must be installed externally
to the drive chassis. The recommended fuses are the ultrarapid fuses
listed on page A-3. To ensure that adequate protection is maintained,
do not install slower types of fuses or allow blown fuses to be replaced
with slower types.
The fuses recommended for input bridge protection can be installed as
drive and motor branch-circuit short-circuit and ground fault protection
if they comply with applicable safety regulations.
Motor Overload
Protection
The ACx 607 can provide overload protection for the motor by
monitoring a thermostat or thermistor in the motor or by calculating the
motor temperature from measured operating data. The overload
protection provided by the drive complies with the requirements of
UL508c. Additional overload protection is not required unless more
than one motor is connected to the drive or unless additional protection
is required by applicable safety regulations.
Power Cables
The input power, motor and ground cables must be sized
according to
local regulations:
1. The cable must carry the ACx 600 load current.
2. The cable terminals of the ACx 600 warm up to 60
°C in use. The
cable must be rated for at least 60
°C maximum operating
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