FIELD: electricity.
SUBSTANCE: vacuum contactor contains a body with three arc extinguishing vacuum chambers installed in it with current leads and movable chamber leads, an electromagnetic drive with two coils, a control unit, a sensor, and an executive relay element, with the same ends of the windings of the executive relay element connected in parallel, and some ends are connected to the positive pole of the rectifier bridge, the other ends - to the negative one through the output circuits of the sensing element, a technical diagnosis unit containing the nodes to determine the time when the contactor is switched on and its switching voltage in the forcing mode, and also the node to determine the voltage at the output ends of the coils of the contactor electromagnetic drive in the hold mode.
EFFECT: timely providing the maintenance personnel with prompt and reliable information on the technical condition of the contactor and its components to reduce the number and duration of downtime, labour intensity in setting up and maintaining the contactor, as well as the safety of its operation.
2 dwg
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SU951457A1 |
