Power circuit breaker and power resistor

Details Power circuit breaker and power resistor Power circuit breaker and power resistor

1993-03-09

1994-12-13

Pellinen, A. D.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200144R, H01H 3316

Patent

active

053731298

ABSTRACT:
A compact power circuit breaker having a large breaking capacity and stable breaking performance by using a compact closing resistor unit having high performance. The power circuit breaker includes a main switch arranged in a current path, an auxiliary switch connected to the current path parallel with respect to the main switch and turned on prior to an ON state of the main switch, and a closing resistor unit connected in series with the auxiliary switch and incorporated with a resistor having a sintered body consisting of a Zn--Ti--Co--O--based oxide and having metal components consisting of titanium calculated as titanium oxide (TiO.sub.2) in an amount of 0.5 to 25 mol %, cobalt calculated as cobalt oxide (CoO) in an amount of 0.5 to 30 mol %, and Zn as substantially the balance.

REFERENCES:
patent: 2892988 (1959-06-01), Schusterius et al.
patent: 4265844 (1981-05-01), Yokomizo et al.
patent: 4420737 (1983-12-01), Miyoshi et al.
patent: 4943795 (1990-07-01), Yamazaki et al.
PRY, et al., Solid-State Electronics, vol. 6, 1963, pp. 111-120. "Positive Temperature Coefficient of Electrical Resistivity in Some ZnO-TiO.sub.2 -NiO Ceramics".

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