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THREE-PHASE HV VACUUM
CONTACTORS & CIRCUIT BREAKERS
HC3
& HJ3 Series
Designed for very long life and low maintenance
control for medium to heavy-duty loads, the HC3 and HJ3 series of
three-phase UV vacuum circuit breakers have proven to be a workhorse
for a majority of the 5 to 15kV, 2 to 12 megawatt magnet rectifier
loads in the major accelerators in the United States, as well as
many other often switched loads. Both series are built for severe
repetitive duty within their interrupting and momentary ratings.
Control power can be 125V DC, 208/240V AC or high speed capacitor
trip giving approximately 1/2 cycle contact parting time with a
total trip and interrupt time of approximately one cycle.
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HC3 Upright |
Closing
times of less than one cycle are common for these vacuum breakers,
making them ideal for very high speed back-to-back source transfer
switching in as short a time as 1/2 cycle. Three SPDT form C, 15A,
480V AC auxiliary contacts are standard and up to five are optional;
10A, 125V DC auxiliaries are also available. Single-pole and
two-pole units Lire available as well as units for voltages up to
300kV. Energy storage closing & tripping units require only 8
amps and 115V 50/60Hz are available. See Solenoid
Drivers.
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