Implementing thermal overload and short circuit protections
￭ Protecting the drive and input power cables in short-circuit
Cabinet-installed multidrives
To protect the input cable in short-circuit situations, install fuses or a suitable circuit breaker
at the supply side of the cabling.
The drive is equipped with fuses as standard. In case of a short-circuit inside the drive, the
fuses protect the drive, restrict drive damage, and prevent damage to adjoining equipment.
In addition, drive with ACS880-307…+A003 diode supply unit equipped with suply module
frame D6D or D7D: Protect the input power cable with the ABB-specified fuses. See the
supply unit hardware manual. The fuses protect the cable, and limit the short-circuit current
of the drive.
Multidrive modules
To protect the input power cable in short-circuit situations, install fuses or a suitable circuit
breaker at the supply side of the cabling.
To protect the drive in short-circuit situations, install the ABB-specified fuses for the supply
unit, inverter units and other units. See the appropriate hardware manuals.
In addition, drive with ACS880-304…+A003 diode supply unit equipped with suply module
frame D6D or D7D: Protect the input power cable with the ABB-specified fuses. See the
supply unit hardware manual. The fuses protect the cable, and limit the short-circuit current
of the drive..
￭ Protecting the motor and motor cable in short-circuits
The drive protects the motor cable and motor in a short-circuit situation when the motor
cable is sized according to the nominal output current of the drive.
￭ Protecting the input power cable against thermal overload
Cabinet-installed multidrives
The drive has overload protection as standard. If the sizing of the input power cable is
correct, the drive overload protection protects also the cable against overload. In case of
parallel input power cables, it may be necessary to protect each cable separately. Obey the
local regulations.
Multidrive modules
The drive has an overload protection as standard when the supply unit, inverter units and
other units are sized and installed correctly. See the appropriate hardware manuals. If the
sizing of the input power cable is correct, the drive overload protection protects also the
cable against overload. In case of parallel input power cables, it may be necessary to protect
each cable separately. Obey the local regulations.
￭ Protecting the drive against thermal overload
Cabinet-installed multidrives
The drive has overload protection as standard.
Electrical planning guidelines 33
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