Overtemperature sensing and signaling circuit

Details Overtemperature sensing and signaling circuit Overtemperature sensing and signaling circuit

1992-06-19

1993-03-30

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

340593, H02H 504

Patent

active

051989565

ABSTRACT:
An overtemperature sensing and signaling circuit for electronic trip units includes a voltage divider (16) and a trigger circuit (18). The voltage divider is formed of a first resistor (R1) and a positive coefficient resistor (PT1). The trigger circuit is formed of a first bipolar transistor (Q1) of the PNP-type conductivity and a second bipolar transistor (Q2) of the NPN-type conductivity.

REFERENCES:
patent: 4360852 (1982-11-01), Gilmore

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