Situations And Against Thermal Overload; Protecting The Drive And The Input Power Cable In Short-Circuits; Tested Circuit Breakers; Protecting The Motor And Motor Cable In Short-Circuits - ABB ACS880-04 Hardware Manual

92 Guidelines for planning the electrical installation
Protecting the drive, input power cable, motor and motor
cable in short circuit situations and against thermal
overload

Protecting the drive and the input power cable in short-circuits

￭
Protect the drive (1) with fuses (a) and the input cable with fuses (b) or a circuit breaker.
b
Size the fuses or the circuit breaker according to local regulations for the input cable
protection. Select the fuses for the drive according to the instructions given in the
technical data. The fuses for the drive protection will restrict drive damage and prevent
damage to adjoining equipment in case of a short-circuit inside the drive.
Note: Circuit breakers must not be used without fuses.
WARNING!
Due to the inherent operating principle and construction of circuit breakers,
independent of the manufacturer, hot ionized gases can escape from the
breaker enclosure in case of a short-circuit. To ensure safe use, pay special
attention to the installation and placement of the breakers. Obey the
manufacturer's instructions.

Tested circuit breakers

￭
You can use the circuit breakers listed in the technical data. Other circuit breakers can
be used with the drive if they provide the same electrical characteristics. ABB does
not assume any liability whatsoever for the correct function and protection with circuit
breakers not listed. Furthermore, if the recommendations given by ABB are not obeyed,
the drive can experience problems that the warranty does not cover.

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 correctly
• the motor cable type complies with the motor cable selection guidelines by ABB
• the cable length does not exceed the allowed maximum length specified for the
drive
• the setting of parameter 99.10 Motor nominal power in the drive is equal with the
value given on the motor rating plate.
The electronic power output short-circuit protection circuitry meets the requirements
of IEC 60364-4-41 2005/AMD1.
1
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a
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M
3~