The invention discloses a miss operation blocking device for a switch cabinet. According to the technical scheme, the miss operation blocking device is arranged on the switch cabinet, a grounding knife-switch is arranged in the switch cabinet, and the miss operation blocking device comprises a communication management module and an action mechanism; an auxiliary contact is arranged at the grounding knife-switch, the communication management module is connected with the auxiliary contact of the grounding knife-switch in the switch cabinet, the action mechanism comprises an electromagnet, a limiting rod, a magnetic check ring and a lock hook, and the magnetic check ring is arranged in the middle of the limiting rod; when the electromagnet is electrified, the magnetic check ring at the limiting rod is attracted by the electromagnet to enable the limiting rod to be separated from the lock hook, and at the moment, the cabinet door is unlocked; and when the electromagnet is not electrified,the limiting rod falls into the lock hook, and at the moment, the cabinet door is locked. According to the miss operation blocking device for the switch cabinet, the safety is high, and only in the case that no electricity exists in the cabinet, a cabinet door can be opened only.

Miss operation blocking device for switch cabinet

The invention discloses a front and rear-interlocking switch cabinet, which comprises front door interlocking, a front lower door, a control unit room, a bus room, rear door interlocking, a rear upperdoor, a grounding switch operation shaft, a cable room, a switch cabinet body and rollers, wherein one side of the upper end of the switch cabinet body is provided with the control unit room; the other side of the upper end of the switch cabinet body is provided with the bus room; one side of the upper end of the switch cabinet body is provided with the rear upper door; the rear upper door is hinged with the switch cabinet body through rear door interlocking; the inner lower end of the switch cabinet body is fixed with the grounding switch operation shaft; one side of the lower end of the switch cabinet body is provided with the cable room; the other side of the lower end of the switch cabinet body is provided with the front lower door; the front lower door is fixedly connected with the switch cabinet body through front door interlocking; and four rollers are arranged around the lower end of the switch cabinet body. The front and rear-interlocking switch cabinet has the beneficial effects that the cable room can be ensured not to be entered in the case when the cable side is charged, moving and use are convenient, and mounting of the grounding wire is convenient.

Front and rear-interlocking switch cabinet

The invention provides direct current checking equipment applicable to a rotor overvoltage protection device, and relates to the technical field of electric field equipment. The direct current checking equipment comprises a booster, a boosting transformer, a silicon controlled bridge and a voltage meter, wherein the booster is used for providing alternating current for the boosting transformer; the boosting transformer is used for boosting the alternating current to increase voltage of an alternating current loop; the silicon controlled bridge is connected with the boosting transformer and isused for inverting the alternating current on the high-voltage side of the boosting transformer into direct current; the voltage meter is connected with the silicon controlled bridge and the rotor overvoltage protection device and is used for monitoring the voltage of the silicon controlled bridge. According to the direct current checking equipment applicable to the rotor overvoltage protection device, a direct-current checking loop is built through the booster and the boosting transformer in high-voltage test equipment and an external high-capacity high-voltage-withstand silicon controlled element, so as to check action voltage and return voltage of the rotor overvoltage protection device, and checking of the rotor overvoltage protection device is realized.

Direct current checking equipment applicable to rotor overvoltage protection device

The invention discloses an improved 10kV high-voltage switch cabinet cable chamber misoperation-preventive locking method and belongs to high-voltage switch cabinet equipment. The improved 10kV high-voltage switch cabinet cable chamber misoperation-preventive locking method comprises the following steps: (1) arranging a high-voltage electric sensor at a high-voltage loop with an earthing knife-switch, additionally arranging an electric display device on a front cabinet door, connecting the high-voltage electric sensor with the electric display device, and enabling the earthing knife-switch to achieve an electric locking function with a cable chamber door directly; (2) arranging a reliable mechanical inter-locking device between the switch cabinet cable chamber door and an earthing switch, and achieving a mechanical locking function of an earthing knife and the cable chamber door; (3) fixing a rear door with loose leaves on one side and special bolts with lock hanging holes on bolt heads, instead of fixing bolts, on the other side. The defects that a misoperation-preventive locking system of a 10kV switch cabinet is imperfect, fed cables are still electrified after the switch is separated and great potential safety hazard can be caused are overcome, operators are prevented from entering a powered room by mistake, and the life security of the operators and the power generation equipment security are ensured.

Improved 10kV high-voltage switch cabinet cable chamber misoperation-preventive locking method

The utility model provides a direct current calibration device suitable for rotor overvoltage protection relates to electric field equipment technical field. Direct current calibration device includespresser, step up transformer, controllable silicon bridge and voltmeter, wherein, the presser is used for doing step up transformer provides the alternating current, step up transformer, it is rightto be used for the alternating current steps up to rising alternating current circuit's voltage, controllable silicon bridge, with step up transformer is connected, be used for with the alternating current contravariant of step up transformer's high -pressure side becomes the direct current, the voltmeter, with controllable silicon bridge and rotor overvoltage protection are connected, are used for keeping watch on the voltage of controllable silicon bridge. The utility model discloses a presser in the high -voltage testing equipment, step up transformer amplify high pressure resistant controllable silicon elements outward, have put up direct current check -up return circuit, and rotor overvoltage protection's check -up has been realized to check -up rotor overvoltage protection's operating voltage and return voltage.

Direct current calibration device suitable for rotor overvoltage protection

The embodiment of the invention discloses a preventive experimenting and testing wiring method applicable to a transformer. The preventive experimenting and testing wiring method comprises the following steps: carrying out fixed region marking on leading-out wires of high-voltage and low-voltage sides of each transformer, so as to obtain a leading-out wire marking region; setting a marking copperblock in the leading-out wire marking region; inserting a plug of a testing wire into an inserting hole of the marking copper block according to preventive experimenting content, so as to realize preventive experimenting and testing wiring of the transformer. According to the preventive experimenting and testing wiring method applicable to the transformer, artificial wiring factor influences can be avoided at the minimum limit; standardized work is facilitated, a working flow is fixed and operation risks are reduced; the preventive experimenting and testing wiring method applicable to the transformer has the advantages of small volume and convenience for detachment and connection; the data comparability is increased and the data analysis and judgment is facilitated.

Preventive experimenting and testing wiring method applicable to transformer

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Improved 10kV high-voltage switch cabinet cable chamber misoperation-preventive locking method

Direct current calibration device suitable for rotor overvoltage protection

Preventive experimenting and testing wiring method applicable to transformer

Direct current checking equipment applicable to rotor overvoltage protection device