Short-Circuit Protection - ABB ACS800 Hardware Manual

Short-circuit protection

Protect the input cable and drive against short-circuit according to the following
guide lines.
Distribution
board
1)
2)
Distribution
Input cable
board
3)
1) Size the fuses according to local safety regulations, appropriate input voltage and the rated current of
the drive (see Technical data).
Standard gG fuses (US: CC or T for the ACS800-U1, ACS800-U11 and ACS800-U31; T or L for the
ACS800-U2 and ACS800-U4) 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.
Check that the operating time of the fuse is below 0.5 seconds (0.1 seconds with ACS800-11/
U11, ACS800-31/U31). The operating time depends on the fuse type (gG or aR), supply network
impedance and the cross-sectional area, material and length of the supply cable. In case the 0.5
seconds (0.1 seconds with ACS800-11/U11 and ACS800-31/U31) operating time is exceeded with gG
fuses (US: CC/T/L), ultrarapid (aR) fuses will in most cases reduce the operating time to an acceptable
level. The US fuses must be of the "non-time delay" type.
For fuse ratings, see Technical data.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
Circuit diagram
DRIVE IS NOT EQUIPPED WITH INPUT FUSES
Drive or drive
Input cable module
~
~
DRIVE IS EQUIPPED WITH INPUT FUSES
Drive
4)
~
Drive
4)
~
Drive type
ACS800-01
ACS800-U1
ACS800-02
ACS800-U2+0C111
~
M
ACS800-11
3~
ACS800-U11
ACS800-31
ACS800-U31
ACS800-04
~
M
3~
ACS800-U4
ACS800-02+C111
ACS800-U2
ACS800-07
ACS800-U7
~
M
3~
~
M
3~
Short-circuit
protection
Protect the drive and
input cable with fuses
or a circuit breaker.
See footnotes 1) and
2).
Protect the input cable
with fuses or a circuit
breaker according to
local regulations. See
footnotes 3) and 4).
Planning the electrical installation
47