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Method for evaluating wear of power switch contacts. RU patent 2297065.

FIELD: evaluating degree of wear of power switch contacts.

SUBSTANCE: proposed method for evaluating wear of pole contacts C1, C2, C3 includes actuation of electromagnet 20 whose movement is controlled by field coil 21. Degree of wear is evaluated by variations in course-of-wear time of contacts C1, C2, C3 formed in the course of electromagnet closing movement; to this end at least one electric signal Ip indicating conductivity of at least one power pole and field current Is carried by electromagnet field coil 21 are measured, then electric signal Ip and field current as functions of time are compared. After that measured course-of-wear time can be compared with initial Ti stored in memory. Switch implementing this method is also given in invention specification.

EFFECT: facilitated procedure, enhanced noise immunity in evaluating degree of wear.

17 cl, 4 dwg

IPC classes for russian patent Method for evaluating wear of power switch contacts. RU patent 2297065. (RU 2297065):

H01H1 - Electric switches

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