UHJ-M Datasheet, PDF (1/6 Pages) Cooper Bussmann, Inc. – 250V and 600V cable limiters

Technical Data 1042
Effective December 2015
Supersedes February 2015
250V and 600V cable limiters
Product description:
Cable limiters are intended to provide short-
circuit protection to electrical systems, typically
between the transformer and service entrance.
Should a short-circuit occur, the cable limiter
removes the affected cable(s) from service
and permits the other conductors to continue
delivering power.
Cable limiters are often used in utility low volt-
age networks and large multi-cable per phase
service entrances.
Unlike fuses, cable limiters are selected by
cable size rather than amperage, e.g., a “4/0”
limiter will carry the current of a 4/0 cable.
Limiters are stable, totally self-contained, static
devices with unchanging characteristics that
operate without venting of ionized gases or
explosive action.
Under high short-circuit conditions, limiters
cut off fault currents within one-half cycle
(0.008 seconds) and reduce insulation damage
from the immense heat that is developed
by sustained fault current flow. They confine
damage to the point of the short-circuit and
stop long-length cable burn-back and striking
of multiple arcs to minimize damage to or
eliminate damage to adjacent conductors.
Features and benefits:
• Cable limiters enhance multi-conductor
system reliability by isolating faulted
conductors and taking them offline while
the balance of the conductors continue
delivering power to their circuits. This is why
cable limiters are often used in utility low
voltage networks and large multi-cable per
phase service entrances.
• Cable limiters enhance service entrance
conductor short-circuit protection with
current-limiting performance that exceed
the typical protection offered by utility
overcurrent protective devices.
• Cable limiters meet many system
requirements with 250Vac or 600Vac
ratings for conductor sizes from 12AWG to
1000kcmil and terminal options available that
make them easy to install including: tube-
to-tube (crimp), tube-to-bolt (crimp/bolt-in),
compression rod-to-tube (crimp) and bolt-to-
offset bolt (bolt-in) options.
• Select cable limiters are UL^® Listed under
File E90818 for use on 600V circuit for the
protection of faults up to 200kA.