Apparatus for detecting degradation of characteristics of arrest

Details Apparatus for detecting degradation of characteristics of arrest Apparatus for detecting degradation of characteristics of arrest

1979-11-19

1981-03-31

Waring, Alvin H.

Communications: electrical

Condition responsive indicating system

Specific condition

340650, 340653, 324 72, G08B 2100

Patent

active

042596661

ABSTRACT:
In an arrester comprising a characteristic element made up of a stack of a plurality of metal oxide resistors, parallelly connected capacitor and a linear resistor are connected between the characteristic element and ground, and voltage drop across the linear resistor is used to light a neon lamp or to operate an alarm device for detecting deterioration of the characteristic element. To protect the capacitor and the linear resistor at the time when the arrester operates, a nonlinear resistor may be connected in parallel with the capacitor and the linear resistor.

REFERENCES:
patent: 3090112 (1963-05-01), Smith
patent: 3156866 (1964-11-01), Anderson et al.

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