Overcurrent relay circuit

Details Overcurrent relay circuit Overcurrent relay circuit

H - Electricity

02

H

348/26

H02H 3/093 (2006.01) H02H 1/06 (2006.01) H03H 11/26 (2006.01) H03H 11/40 (2006.01) H03H 11/48 (2006.01)

Patent

CA 1168746

ABSTRACT OF THE DISCLOSURE An overcurrent relay circuit has a power supply developed from a test signal representative of the current in the line being monitored. The power supply is a Zener diode and capacitor arrangement connected in series with the load or test resistor. A variable time-current characteristic circuit (or timing plug) is based upon a variable effective capacitance circuit in which the timing capacitor and resistor currents are isolated from, but dependent upon, one another.

375783

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