Brochure

50
Medium Voltage Fuses
UL/CSA Fuses Current Limiting
UL/CSA Fuses General Purpose
Special Purpose Fuses
Canadian Fuses & Holders
Application Section
Fuse Blocks, Holders & Misc.
Copper Cable Limiters (600Vac)
Copper/Aluminum Cable Limiters (250Vac)
For additional information, visit www.edisonfuse.com
Application of Cable Limiters:
By industry definition, cable limiters do not provide overload
protection. Class J and Class L fuses for three or more
cables-per-phase applications should be considered if
overload protection is a concern. This may also be a
desirable consideration for aluminum cable using suitable
connectors.
Cable limiters applied in utility networks and building power
system main parallel service cables are primarily intended
to isolate faults in multiple-cables-per-phase installations.
This prevents total power outages until maintenance of
faulted cable(s) can be scheduled. During the process of
opening under fault conditions to isolate faulted cable(s),
limiters current limiting action reduces potential for excess
heat damage to unfaulted cables.
Dimensions - inches
Cable Limiters 250 Volts or Less AC
For applications having three or more parallel cables-
per-phase, cable limiters are installed at each end of each
cable. For nonparallel or multiple radial cables, limiters may
successfully be applied at the source end of each cable for
fault isolation.
When analyzing cable limiter potential applications, it is not
unusual to forget that normal and abnormal current through
cable limiters is divided just as it is between cables.
Selectivity with upstream overcurrent protection devices is
seldom of concern. When designing for cable limiter fault
isolation to prevent a burn down or unscheduled blackout by
one faulted cable, it is desirable to determine the continuous
rating load (3 hours or more) that the remaining cables must
handle without overheating.
Cat. No. UCLA