Protection Against Short-Circuit Inside The Drive Or In The Supply Cable - ABB ACS800-U7 Hardware Manual

Protection against short-circuit inside the drive or in the supply cable

Arrange the protection according to the following guide lines.
Distribution
Input cable
board
3)
1) Size the fuses according to instructions given in chapter
cable in short-circuit situations, restrict drive damage and prevent damage to adjoining equipment in
case of a short-circuit inside the drive.
2) 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.
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.
Note: Circuit breakers must not be used without fuses in the USA.
3) Size the fuses according to local safety regulations, appropriate input voltage and the rated current of
the drive (see chapter Technical data).
4) ACS800-07 units with enclosure extension are equipped with aR fuses as standard. ACS800-U7 units
are equipped with T/L fuses as standard. The fuses restrict drive damage and prevent damage to
adjoining equipment in case of a short-circuit inside the drive.
Circuit diagram
DRIVE IS EQUIPPED WITH INPUT FUSES
Drive
4)
Drive
4)
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.
Drive type
ACS800-07
ACS800-U7
~
M
~
3~
~
M
~
3~
Technical
Short-circuit
protection
Protect the input cable
with fuses or a circuit
breaker according to
local regulations. See
footnotes 3) and 4).
data. The fuses will protect the input
Planning the electrical installation
47