Relay with overload protection

Details Relay with overload protection Relay with overload protection

1997-09-09

1999-03-30

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Polarity-responsive

335128, H01H 5122

Patent

active

058894535

ABSTRACT:
A relay for overcurrent or short-circuit protection is provided wherein the relay has a thermistor in the form of a film of polymer material. The thermistor is arranged over a large surface in the interior of the relay between a connection segment of a terminal element and a terminal plate coupled parallel thereto. By such design, the thermistor is serially connected into the load circuit of the relay. Upon the appearance of either an overcurrent or a short circuit, the thermistor makes an immediate shift to a high resistance value, thereby interrupting the load circuit.

REFERENCES:
patent: 3240996 (1966-03-01), Sohns
patent: 4237441 (1980-12-01), van Konyenburg et al.
patent: 4504817 (1985-03-01), Shikama et al.
patent: 5170322 (1992-12-01), Von Guttenberg
patent: 5291166 (1994-03-01), Chikira

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