Control circuitry including phase failure relay

Details Control circuitry including phase failure relay Control circuitry including phase failure relay

1987-03-11

1989-01-31

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 86, 361 92, H02H 300

Patent

active

048020532

ABSTRACT:
A system for sensing the phase of a three-phase AC system and detecting phase reversal and undervoltage and phase unbalance and for providing a switching function when the system is not functioning properly.

REFERENCES:
patent: 4199798 (1980-04-01), Leppke et al.
patent: 4458283 (1984-07-01), Iida

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