Cable Limiters 600 Volts AC SPECIFICATIONS Voltage Rating: 600 volts AC Interrupting Rating: 200,000 Amperes Cable Size Range: 4/0 – 750MCM Copper or Aluminum Minimum Operating Temperature: 80°C ORDERING INFORMATION Type of Termination Terminal Material (Aluminum or Copper) Littelfuse Cable Limiter Conductor Size LFCL - 500 - C - 1 DESCRIPTION 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. Cable limiters are 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). CATALOG NUMBER Cable Type Type Termination Cable Size COPPER ALUMINUM 4/0 LFCL4/0C1 LFCL4/0A1 250MCM LFCL250C1 LFCL250A1 1 350MCM LFCL350C1 LFCL350A1 Cable to 500MCM LFCL500C1 LFCL500A1 Cable 750MCM LFCL750C1 LFCL750A1 4/0 250MCM 350MCM 500MCM 750MCM LFCL4/0C3 LFCL250C3 LFCL350C3 LFCL500C3 LFCL750C3 5 4/0 250MCM Straight Bus 350MCM to 500MCM Offset Bus 750MCM LFCL4/0C5 LFCL250C5 LFCL350C5 LFCL500C5 LFCL750C5 6 Mole to Cable 4/0 250MCM 350MCM 500MCM 750MCM LFCL4/0C6 LFCL250C6 LFCL350C6 LFCL500C6 LFCL750C6 Mole to Offset Bus 4/0 250MCM 350MCM 500MCM 750MCM LFCL4/0C8 LFCL250C8 LFCL350C8 LFCL500C8 LFCL750C8 3 Cable to Offset Bus APPLICATIONS Service entrance conductors Between transformer or network bus and busway terminal boxes Large feeders with three or more conductors per phase FEATURES ■ ■ ■ 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. 106 8 LFCL4/0A3 LFCL250A3 LFCL350A3 LFCL500A3 LFCL750A3 LFCL4/0A6 LFCL250A6 LFCL350A6 LFCL500A6 LFCL750A6