Test circuit for indication of deviation of source voltages from

Details Test circuit for indication of deviation of source voltages from Test circuit for indication of deviation of source voltages from

1977-06-23

1979-02-13

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307355, 328146, H03K 518

Patent

active

041397886

ABSTRACT:
A test circuit for determining when one of a number of source voltages deviates from its set point. Each source voltage has coordinated comparison circuit which compares the voltage with a preset value, and which has a limited range of output voltage. Each comparison circuit has its output connected to a switching circuit. The output of each switching circuit is connected to a short circuit coil of one coupling transformer. The coupling transformer is fed from an auxiliary current source through an auxiliary coil and has as output a pick-up coil connected to an evaluation device.

REFERENCES:
patent: 3742251 (1973-06-01), Thompson et al.

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