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High Capacity Limiter is
designed to economically protect electrical
distribution systems from the destructive
effect of high energy faults. The increasing
number of 600 volt secondary network instal-
lations for industrial and commercial applica-
tions demand a cable limiter that can safely
interrupt 200,000 amperes (symmetrical
available) and one that will also completely
coordinate with the higher voltage network
protector fuses.
Available fault currents as high as 200,000
amperes rms at 600 volts across the fusible
elements have been interrupted during tests
on the BURNDY
High Capacity Limiter. The
power factor during these tests was less than
15%, thereby imposing the most difficult
clearing conditions. No external disturbance
is experienced upon clearing fault currents
from the “float” value to 200,000 amperes.
The quartz tiller absorbs the intense energy
generated by interrupting the fault current.
The quartz fuses into tubular fulgurites, with a
high dielectric strength, and forms an insulat-
ing barrier between the melted link sections.
This action prevents restrike of the internal
arc. The rugged aluminum housing and cast
epoxy end seals provide a vessel that com-
pletely contains the developed energy.
The carefully developed time-current charac-
teristics and rigid manufacturing tolerances
assure proper coordination with the network
protector tuses and the insulation damage
characteristics of 4/0, 250, 350, 500 kcmil
and 750 cable.
The High Capacity Limiter is available in four
variations to accommodate a variety of instal-
lation practices. The Type HYS cable sockets
at both ends, which allow for indenting to the
cable ends with a hydraulic BURNDY
HYPRESS™. The HYA has an off-set lug on
one end which permits back-to-back mount-
ing on bus bar. The HYA also allows cable to
installation with no off-set.
For those installations where BURNDY
MOLEs are used for manhole junctions or
transformer vault buses, the Type HYM per-
mits a replaceable connection of the limiter
directly to the MOLE™ outlet at one end and
a compression cable connection at the other.
Modern electrical distribution systems require
low cost protection to safeguard costly
equipment and quickly isolate faults, so that
the undamaged portions of the system may
function normally. BURNDY
High Capacity
Limiters assure positive, economical protec-
tion when installed in properly designed sys-
NOTE: Today's fault currents are growing. If
you need higher fault current ratings please
contact factory.
200,000 AMPERES AT 600 VOLTS
Blue highlighted items are industry standard and most frequently ordered.
Canada: 1-800-387-6487
US: 1-800-346-4175