Disconnecting Means; Input Line Fuses; Motor Overload Protection; Power Cables - ABB ACS 601 Hardware Manual

Chapter 3 – Electrical Installation

Disconnecting Means

Input Line Fuses

Motor Overload
Protection

Power Cables

Cable Insulation
Voltage Ratings
3-2 ACx=ACS/ACC/ACP
be greater than 1 MΩ.
5. Measure the insulation resistance of the motor cable between the
phases and between each phase and Ground (PE). The insulation
resistance must be greater than 1 MΩ.
The ACx 601 does not include a disconnecting means. An input power
disconnecting means must be installed between the AC power source
and the ACx 601. The disconnecting means must conform to the
applicable safety regulations. The disconnecting means must be
locked in the open position during installation and maintenance work.
The motor must not be controlled with the supply disconnecting means;
instead, the and
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 are required to protect the input bridge of the ACx 600
in the event of an internal short circuit or ground fault. Fuses are not
included in the drive and must be installed externally. The
recommended ultrarapid fuses are listed in Appendix A. To ensure that
adequate protection is maintained do not install slower types of fuses
and do not 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.
The ACx 601 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.
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
cable must be rated for at least 60
temperature.
As a minimum requirement, cable insulation voltage ratings must
conform to all applicable safety regulations. In addition, motor
keys of the Control Panel or commands via
°
C maximum operating
ACS/ACC/ACP 601 Drives
°
C in use. The