Planning the electrical installation
46
Protection against short-circuit inside the drive or in the supply cable
Protect the drive and input cable with fuses or a circuit breaker.
Fuses
Size the fuses according to instructions given in chapter Technical data. The fuses
will protect the input cable in short-circuit situations, restrict drive damage and
prevent damage to adjoining equipment in case of a short-circuit inside the
drive.Circuit breakers which have been tested by ABB with the ACS800 can be
used. Fuses must be used with other circuit breakers. Contact your local ABB
representative for the approved breaker types and supply network characteristics.
Circuit breaker
The protective characteristics of circuit breakers depend on the type, construction
and settings of the breakers. There are also limitations pertaining to the short-circuit
capacity of the supply network.
WARNING! Due to the inherent operating principle and construction of
circuit breakers, independent of the manufacturer, hot ionized gases may
escape from the breaker enclosure in case of a short-circuit. To ensure
safe use, special attention must be paid to the installation and placement
of the breakers. Follow the manufacturer’s instructions.
Note: Circuit breakers must not be used without fuses in the USA.
Circuit diagram
DRIVE IS NOT EQUIPPED WITH INPUT FUSES
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M
3~
Distribution
board
Input cable
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M
3~
Drive or drive
module
I >
Circuit
breaker
Fuses
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