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TYPE 82 RECLOSING RELAY
TYPE 82 RECLOSING RELAY
GENERAL The SWARTZ® Type 82 DC Reclosing relay from SMC is part of a solid state Relcosing system that prevents the closing of a DC breaker on a faulted line. After a fault or overcurrent trip occurs, the relay provides load side fault verification before the breaker can close and will automatically reclose the breaker on a clear line. The type 82 Relay is designed to be used on light and heavy rail systems.
DESCRIPTION The reclosing system consists of two units: the SWARTZ® DC Reclosing Relay and a SWARTZ® solid state transducer. The transducer is a self powered unit that sends converted, properly scales bus voltages to the relay. The relay can be remotely mounted from the transducer to eliminate exposure to traction voltage. The relay responds to the input and performs the functions of voltage measurement, load measurements , sequencing and indication. The relay measures voltage on the load side of the breaker and picks up if the voltage is above its pre-set vales to close the breaker on a clear line. The relay will maintain pre-existing line voltage measurements and measure the differential voltage when the load measuring is applied. If the differential voltage is above the pre-set values, it will close the breaker. The set value for the relay is the voltage produced by the load measuring current at the minimum feeder resistance. Adjustments include time for each stem of the sequence, number of attempts and levels for voltage and dead load pick-up.
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