Protecting The Motor And Motor Cable In Short Circuits; Protection Against Short Circuits In The Drive Or Supply Cable - ABB ACS800-04 Hardware Manual

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 is equal to the value on the
motor rating plate.
The electronic power output short-circuit protection circuitry meets the
requirements of IEC 60364-4-41 2005/AMD1, Clause 411.

Protection against short circuits in the drive or supply cable


Arrange the protection according to the following guide lines.
Distribution
board
1) Size the fuses according to instructions given in chapter
protect the input cable in short-circuit situations, restrict drive damage and prevent damage to
adjoining equipment in case of a short circuit in 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.
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.
WARNING! In the USA, do not use circuit breakers without fuses.
Circuit diagram
DRIVE IS NOT EQUIPPED WITH INPUT FUSES
Input cable
1)
2)
Planning the electrical installation 47
Drive or drive
module
~
M
~
3~
~
M
~
3~
Technical data
(page 99). The fuses will
Short-circuit protection
Protect the drive and input
cable with fuses or a
circuit breaker. See
footnotes 1) and 2).