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Ratings available
through 35kV, with 12 or 18kA symmetric interrupting.
For single phase operation, the model VI
vacuum interrupter consists of a single vacuum bottle mechanically
linked to a spring-assisted operating mechanism. For three
phase operation, the single phase mechanisms are mechanically
linked together with an external operating handle assembly.In
both cases, once initiated, the interrupting time of the vacuum
bottles is approximately 3 cycles (50 mseconds). A position
indicator (open-green, closed-red) is mounted to the moving
contact and is visible through a viewing window for positive
contact position. The mechanical linkage assembly provides
a "trip-free" operation permitting the vacuum interrupter
to interrupt independent of the operating handle if closing
into a faulted circuit.
The trip module monitors the current on
each phase and activates a trip solenoid to open one or all
three vacuum interrupters if an overcurrent on any phase is
sensed. The trip module is self-powered by current transformers
mounted inside the sealed switch tank. No external power source
is required. Load current is required for the electronics
to be activated unless the optional remote power feature is
specified. The trip selector is used to select the time-current
response curve for the tap circuits. Factory setting for single
or three phase tripping is standard. The time-current response
curves are chosen with the phase selector switches on the
face plate of the trip module. Selection of time-current characteristics
may be made under load or no-load conditions with continuous
current ranges in twelve selectable levels.
The manual trip and reset of the vacuum
interrupter is accomplished through an operating handle. Motor
actuators can be provided for remote control. Optional pushbutton
on certain electronics also permits manual tripping.
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