CN202260422U

CN202260422U - Induction type high voltage display locking device

Info

Publication number: CN202260422U
Application number: CN201120390055XU
Authority: CN
Inventors: 刘瑾; 张志强; 董文娟
Original assignee: XI'AN GUANGYUAN ELECTRIC Co Ltd
Current assignee: XI'AN GUANGYUAN ELECTRIC Co Ltd
Priority date: 2011-10-13
Filing date: 2011-10-13
Publication date: 2012-05-30
Anticipated expiration: 2021-10-13

Abstract

An induction type high voltage display locking device comprises a controller. The inductors are connected with the controller and arranged below a high voltage device beyond a safe distance. The inductors adopt an electric field induction method and are not contacted with a primary circuit so that a high voltage experiment is not required. The controller adopts the principle that detection electrodes are forced to be connected with the ground through tiny input resistance and amplitude of grounding current is taken out as signals and can not affect stability and strength of input signals because of gradual aging of the cables. In addition, current is leaked through grounding and can not relate to other equipment inside a switch station, and simultaneously stable input signals are obtained, therefore the device obtains high anti-disturbance and anti-overvoltage capacity, and high stability and reliability of operation of the device are guaranteed. A control circuit adopts a single-chip microprocessor to obtain functions of initiative self-detection, automatic blocking when device faults are discovered and the like. The induction type high voltage display locking device can display in split-phase mode and in three-phase synchronous mode.

Description

The charged demonstration locking device of a kind of induction-type high-voltage

Technical field

The utility model belongs to high-tension apparatus electrical verification technical field, is specifically related to the charged demonstration locking device of a kind of induction-type high-voltage.

Background technology

Along with popularizing of China's intelligent grid technology, need the instrument and the device of the various power equipment running statuses of a lot of inspections in transformer station inside.The at present domestic high voltage that is applied in detects, and still adopts electrostatic voltmeter and voltage transformer, all require to contact with measured object, the insulating requirements height, operate careless slightly will be accidents caused.A kind of in addition capacitance-voltage-distributing type high voltage display device is to adopt capacitor that high voltage is carried out dividing potential drop to extract signal, thereby judges whether measurand is charged, and this still belongs to contact type measurement, has the possibility of insulation breakdown too.From the high voltage display device of external import, though have contactlessly, but still be that phase-splitting shows and costs an arm and a leg, can't popularize.

Summary of the invention

In order to overcome the shortcoming of above-mentioned prior art, the purpose of the utility model is to provide a kind of induction-type high-voltage charged demonstration locking device, adopts noncontact electrical verification mode, can phase-splitting show and the demonstration of three synchronised.

In order to achieve the above object, the technical scheme taked of the utility model is:

The charged demonstration locking device of a kind of induction-type high-voltage comprises that the connection lead-in wire of 1, three inductor 2 of controller is connected with controller 1 interior binding post, and inductor 2 is installed on outside the safe distance of high-tension apparatus below.

Described controller 1 comprises three self check control switching circuit A; First input of three self check control switching circuit A and the output of corresponding input protection circuit B are connected; Second input of three self check control switching circuit A and the output of corresponding self-test signal circuit C are connected; The output of three self check control switching circuit A is imported accordingly with MCU and is connected with amplification D, comparator E through corresponding I/V conversion, and each comparator E regulates F with correspondent voltage and is connected, and the 3rd input of returning output and three self check control switching circuit A of MCU is connected; The pressure input of MCU is connected with pressure self check G; First output of MCU is connected with display unit H, and second output of MCU is connected with electrical verification output relay J, and the 3rd output of MCU is connected with fault output relay K.

Described inductor 2 comprises inductor cap 3, and an end of electrode 4 is configured in the inductor cap 3 through first insulator 5 and second insulator 6, and the other end of electrode 4 stretches out second insulator, the 6 outer lead-in wires that are connected with inductor and joins.

The utility model has the advantages that and to realize the noncontact high-voltage charged body and accurately judge, show whether electrified body is charged, use, safeguard, maintenance is not convenient fragile.Device has very high anti-interference, anti-overvoltage capabilities, guarantees the high stability and the high reliability of its operation.The intelligent self-checking function that device is had can be accomplished initiatively self check automatically, automatic blocking when finding plant failure, and the concurrent warning of being out of order, the scene of being convenient to is patrolled and examined and background monitoring.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is that the inside of controller 1 connects sketch map.

Fig. 3 is inductor 2 structural representations.

Embodiment

Below in conjunction with accompanying drawing the utility model is done detailed description.

With reference to Fig. 1, the charged demonstration locking device of a kind of induction-type high-voltage comprises that 1, three inductor 2 of controller is connected with controller 1, and inductor 2 is installed on outside the safe distance of high-tension apparatus below.

With reference to Fig. 2; Described controller 1 comprises three self check control switching circuit A; First input of three self check control switching circuit A and the output of corresponding input protection circuit B are connected, and second input of three self check control switching circuit A and the output of corresponding self-test signal circuit C are connected, and the output of three self check control switching circuit A is imported accordingly with MCU and is connected with amplification D, comparator E through corresponding I/V conversion; Each comparator E regulates F with correspondent voltage and is connected; The 3rd input of returning output and three self check control switching circuit A of MCU is connected, and the pressure input of MCU is connected with pressure self check G, and first output of MCU is connected with display unit H; Second output of MCU is connected with electrical verification output relay J, and the 3rd output of MCU is connected with fault output relay K.

With reference to Fig. 3, described inductor 2 comprises inductor cap 3, and an end of electrode 4 is configured in the inductor cap 3 through first insulator 5 and second insulator 6, and the other end of electrode 4 stretches out second insulator, the 6 outer lead-in wires that are connected with inductor and joins.

The operation principle of the utility model is:

The inductor of the utility model adopts the electric field induction mode not contact with a circuit, so needn't carry out high voltage test, the principle that controller adopts is with minimum input impedance; To detect electrode and force ground connection; And take out the amplitude of earth current as signal, it can be because of the progressively aging of cable influence the stable and strong and weak of input signal, and electric current is through the ground connection leakage; Can not relate to miscellaneous equipment in the switchyard; Obtain stable input signal simultaneously, make its device have very high anti-interference, anti-overvoltage capabilities, guarantee the high stability and the high reliability of its operation.Control circuit Implemented by Using Single-chip Processor microprocessor has solved initiatively self check, function such as automatic blocking when finding plant failure.

Outside the high voltage alive equipment safe distance, utilize electromagnetic induction principle, can realize not contacting high-voltage charged body and accurately judge, show whether electrified body is charged; And having higher sensitivity and directivity, antijamming capability is strong, possesses the repertoire that phase-splitting shows; Can three synchronised show that also the direct digital alive circuit situation that shows is used, safeguards, overhauls convenient not fragile; Charged when tested high-tension apparatus, the ability flashing light alarm is exported block signal simultaneously; Automatically cut off " five is anti-" loop, the high pressure isolation knife can't be operated, realize forced blocking.Can also node signal be provided for the electrical verification of " micro_computer five_proof device ", in addition, the intelligent self-checking function that device is had can be accomplished initiatively self check automatically, automatic blocking when finding plant failure, and the concurrent warning of being out of order, the scene of being convenient to is patrolled and examined and background monitoring.

Claims

1. charged demonstration locking device of induction-type high-voltage is characterized in that: comprise controller (1), the connection lead-in wire of three inductors (2) is connected with binding post in the controller (1), and inductor (2) is installed on below the high-tension apparatus outside the safe distance.

2. the charged demonstration locking device of a kind of induction-type high-voltage according to claim 1; It is characterized in that: described controller (1) comprises three self check control switching circuits (A); First input of three self check control switching circuits (A) and the output of corresponding input protection circuit (B) are connected; Second input of three self check control switching circuits (A) and the output of corresponding self-test signal circuit (C) are connected; The output of three self check control switching circuits (A) is imported accordingly with MCU with amplification (D), comparator (E) through corresponding I/V conversion and is connected, and each comparator (E) is all regulated (F) with correspondent voltage and is connected, and the 3rd input of returning output and three self check control switching circuits (A) of MCU is connected; The pressure input of MCU is connected with pressure self check (G); First output of MCU is connected with display unit (H), and second output of MCU is connected with electrical verification output relay (J), and the 3rd output of MCU is connected with fault output relay (K).

3. the charged demonstration locking device of a kind of induction-type high-voltage according to claim 1; It is characterized in that: described inductor (2) comprises inductor cap (3); One end of electrode (4) is configured in the inductor cap (3) through first insulator (5) and second insulator (6), and the other end of electrode (4) stretches out the outer lead-in wire that is connected with inductor of second insulator (6) and joins.