On
receiving a utility power failure signal, switchgear starts engine
generator(s) and controls their synchronization and individual circuit breaker closure to parallel
the generators onto the emergency bus. Additional controls allow
transfer of loads to the emergency bus on a priority basis.
Upon return of the
preferred source, utility paralleling switchgear synchronizes and
parallels the engine generators to the preferred source, and
transfers the loads without power interruption. Generator test
-- transferring load from source to source without power interruption
-- is also available. Use of the closed transition operation
minimizes load interruptions during test and retransfer.
All
systems are UL listed
IEC
listings available
All
systems are provided with selector switches for :
Open or closed
transition
Automatic or
manual paralleling of generator or utility sources