FIELD: electricity.
SUBSTANCE: dispenser comprises at least one terminal, the apparatus having: a pair of contacts (12, 14), a drive mechanism (22) of the support arm (16) of the first contact (14) poles a rotating shaft and at least one connecting rod ( 60), energy storage system arranged to cause movement of said lever to contact closure (12, 14). The method includes measuring the angle of rotation of the shaft poles during contact closure (12, 14), converting the at least two values from the measurements and comparing them with the reference value for operating the actuator diagnosing deterioration of mechanical characteristics (22).
EFFECT: fire prevention circuit breaker.
10 cl, 11 dwg
