Electric power system power distribution protection device, application and method

Abstract

The invention discloses an electric power system power distribution protection device, an application and a method. The electric power system power distribution protection device comprises a power distribution cabinet body, a travel switch, three electromagnetic relays, a signal lamp and a controlled switch, wherein the three electromagnetic relays act on the controlled switch through the signal lamp, electromagnetic coil circuits of two of the electromagnetic relays are mutually controlled and respectively act in normal power supply and temporary maintenance, the other electromagnetic relay performs delay timing, assists standby application and is also controlled by the other two electromagnetic relays, and the three electromagnetic relays form three control circuits to act on the controlled switch. The electric power system power distribution protection device can perform operations such as maintenance, transformation, switching and periodic inspection on power distribution equipment in a power distribution cabinet or box without interrupting power supply; when the power distribution cabinet or box is illegally opened by a law breaker, power supply for the system is interrupted if a special key is still not inserted within a set time, and the power supply is recovered only when the special key is inserted.

Description

technical field [0001] The invention relates to a power system distribution protection device, application and method. Background technique [0002] At present, power distribution devices such as power distribution cabinets, metering boxes and other equipment are the most direct barriers to protect important equipment such as transformer taps, transformers, and energy meters. , and then close the cabinet (box) door to restore the power distribution device to its original state, which can easily cause electricity theft. Moreover, the means of stealing electricity are becoming more and more hidden. After the electricity theft occurs, it is difficult to find it in a short time. It is often used by electricity inspectors through data such as line loss rate, station area change rate, and user power consumption changes within a period of time. Conduct analysis, and then conduct on-site investigation and evidence collection. After the electricity theft is confirmed, follow-up pro...

AI Technical Summary

Problems solved by technology

And these two kinds of power-stealing means all need to open power distribution cabinet (box), just can its interior be operated, if add a special protection device to power distribution cabinet (box), add a travel switch at the cabinet (box) door place , touch the protection device when it is turned on, if the special key is inserted, the second switch circuit will be activated, and the power supply will still be maintained; if the special key is not inserted, the designed auxiliary switch circuit will be disconnected after a period of delay, and the system will be powered off. Insert the special key, the power supply of the system cannot be restored

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