Protective relay test sets are used to test relays — from simple over-current relays to complex three-phase, microprocessor-based relays that require phase-shifting capabilities. Numerous organizations — utilities, manufactures, service companies — use protective relay test sets to accommodate the periodic testing and maintenance of their protective relay test systems. Relay test sets are used for all critical operational areas including transmission, distribution and generation. The test simulates different fault conditions and monitors the performance of the protective device under test. In addition to protective relays, relay test sets can be applied to small molded-case circuit breakers and motor overload relays.
Protec maintains a sizeable inventory for relay testing, including the Doble F2010 Minicontroller for the Doble F2000 series of relay test sets. The Doble F2010 Minicontroller expands control of the F2000 series instruments for instantaneous switching and variable rate changes between two values of voltage, current, phase angle and frequency.