Special Purpose Fuses
Cable Limiters
600 Volts AC
Cable limiters are fusible devices that provide very fast short-circuit
protection, primarily to faulted cables, but also to other conductors such
as busway. Cable limiters do not have an ampere rating, and cannot be
used to provide overload protection. They are instead selected by cable
size; for example, a 500 kcmil cable requires a 500 kcmil cable limiter.
Their main use is to isolate faulted cables in circuits containing three or
more parallel conductors per phase. They may be installed on the line
side of the main service to provide short-circuit protection to the service
conductors. This is especially important when service conductors are
tapped from large low voltage networks or from large low impedance
transformers.
Cable limiters have terminals which permit them to be installed in a
variety of equipment. The most common configuration is the offset
blade on one end and the crimp terminal on the other end. This permits
the limiter to replace a cable terminal (lug).
Applications
Service entrance conductors
Between transformer or network bus and busway terminal boxes
Large feeders with three or more conductors per phase
Features
Special Purpose Fuses
• Current-limiting characteristics provide protection to conductor
insulation and reduce damage when faults occur.
• Properly applied cable limiters may permit the use of equipment with
reduced withstand ratings
• Wide variety of terminations and cable ratings permit use in almost
every situation.
Description
Type
Termination
Cable Size
4/0
250MCM
350MCM
500MCM
750MCM
4/0
250MCM
350MCM
500MCM
750MCM
4/0
250MCM
350MCM
500MCM
750MCM
4/0
250MCM
350MCM
500MCM
750MCM
4/0
250MCM
350MCM
500MCM
750MCM
Catalog Number
Cable Type
Copper
Aluminum
LFCL4/0C1
LFCL4/0A1
LFCL250C1
LFCL250A1
LFCL350C1
LFCL350A1
LFCL500C1
LFCL500A1
LFCL750C1
LFCL750A1
LFCL4/0C3
LFCL4/0A3
LFCL250C3
LFCL250A3
LFCL350C3
LFCL350A3
LFCL500C3
LFCL500A3
LFCL750C3
LFCL750A3
LFCL4/0C5
–
LFCL250C5
–
LFCL350C5
–
LFCL500C5
–
LFCL750C5
–
LFCL4/0C6
LFCL4/0A6
LFCL250C6
LFCL250A6
LFCL350C6
LFCL350A6
LFCL500C6
LFCL500A6
LFCL750C6
LFCL750A6
LFCL4/0C8
–
LFCL250C8
–
LFCL350C8
–
LFCL500C8
–
LFCL750C8
–
Specifications
Voltage Rating:
Interrupting Rating:
Cable Size Range:
600 volts AC
200,000 Amperes
4 ⁄0
– 750MCM Copper or Aluminum
1
Cable to Cable
3
Cable to Offset
Bus
Note: For Type 5 and Type 8 Aluminum cable limiters, use the Copper Type C5
and C8.
Ordering Information
LFCL - 500 - C - 1
Littelfuse
Cable Limiter
Conductor Size
Terminal Material
(Aluminum or Copper)
5
Straight Bus to
Offset Bus
6
Mole to Cable
8
Mole to Offset
Bus
Type of
Termination
108
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