Apparatus for monitoring circuit integrity

Details Apparatus for monitoring circuit integrity Apparatus for monitoring circuit integrity

1985-03-11

1987-01-27

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

219497, 219506, 340640, 340658, 340655, 340514, G08B 2100

Patent

active

046397191

ABSTRACT:
An apparatus to monitor a circuit in which an AC voltage source is connected to a plurality of paralleled current consuming loads, such as heaters, including a reactive load in parallel with the current consuming loads at a point in the circuit more distant from the voltage source than any of the current consuming loads being monitored, a phase shift detector connected to the current consuming loads and at a point in the circuit between the voltage source and the nearest current consuming load being monitored, the phase shift detector being sensitive to the shift in current phase induced by the reactor load, and an alarm connected to and actuated by the phase shift detector which provides a warning when the phase shift induced by the reactive load is lost, indicative of a failure in the circuit.

REFERENCES:
patent: 4287515 (1981-09-01), Raber et al.

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