FIELD: physics.
SUBSTANCE: device has a three-phase half-wave rectifier, made from diodes, a relay and a dynistor. Diode anodes are connected to network phases through ballast resistors. Diode cathodes are connected to each other. One of the relay terminals is connected to the body. The actuating contact of the relay is connected to an alarm system. The anode of the dynistor is connected to the diode common point. Cathodes of the dynistor are connected to the second terminal of the relay.
EFFECT: prevention of effect of monitoring device on insulating resistance of the monitored network, increased noise immunity of the device, prevention of false activation.
1 dwg
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