Over-current protection relay MIC series
overloadphasefor electric motors

over-current protection relay
over-current protection relay
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Measured/monitored value
over-current, overload, phase
for electric motors, for feeder, for transformers
Other characteristics
digital, time delay


Manufacturing for this product has been discontinued. As an alternative, please refer to F35 or DIAC/DIFC/DSFC relays. The MIC 1000 is a digital, microprocessor- based overcurrent relay that provides nondirectional phase to phase and phase to ground overcurrent protection. The relay's overcurrent function can be inverse time, where four families of curves are provided, or definite time with four times offered, as well instantaneous operation with adjustable time delay. All of these features are offered in a single relay. Applications • AC feeders, motors, transformers, etc. • Overload protection • Protection and Control • Instantaneous and time overcurrent APPLICATIONS The MIC relay is applied on alternating current circuits (feeders, motors, transformers, etc.), and provides effective protection against overloads, and rapid detection of short circuits. Negligible overtravel (less than 50 ms for the time unit, less than 25 ms for the instantaneous unit), and a high drop-out to pick-up ratio (<95%), along with the instantaneous unit adjustment tap, allow optional coordination and reclosing, without compromising selectivity. Operation of the instantaneous unit can be blocked for both phase to phase and phase to ground conditions. CONSTRUCTION ■ accurate and reliable, with low power consumption ■ fixed rack, 1/3 case, 19" rack ■ drawout, 1/4 case, 19" rack ■ LED starting lamps and system availability indicators ■ shock proof, non-flammable, sealed plastic case, which permits exterior reset of indicating LED’s ■ anti-seismic waveform response ■ high reliability solid-state components ■ microprocessor system


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