CN2313230Y

CN2313230Y - Insulation discharging detecting instrument

Info

Publication number: CN2313230Y
Application number: CN 97230899
Authority: CN
Inventors: 马光侠; 李学军
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-12-30
Filing date: 1997-12-30
Publication date: 1999-04-07
Anticipated expiration: 2007-12-30

Abstract

The utility model discloses an insulating electric discharge detecting instrument which is a testing device used for the transformer substation of a power supply system. The utility model can measure the insulation resistance of high voltage equipment, and can also be used for testing whether the action condition of an electric discharge recorder of a lightning conductor of the transformer substation is normal or not. The utility model is technically formed by that a megohmmeter is reformed, an electric charging loop is formed by that the loops Li-R2 of the megohmmeter are connected with a capacitor C in series, and an electric discharge loop is composed of the capacitor C and an electric discharge recorder of a lightning conductor. The utility model has the advantages of simple structure, novel conception, economization and high durability.

Description

The discharge in insulation tester

The utility model relates to a kind of test unit that electric power system transformer station uses, especially a kind of high voltage equipment insulation preventive trial device.

In electric power system transformer station high voltage equipment insulation preventive trial, the insulation resistance of measuring high-tension apparatus is absolutely necessary at present, and this need of work uses megohmmeter; The running-active status of measuring the discharge counter of transformer station's lightning arrester is very important; because discharge counter can write down local thunderbolt situation effectively; equipment that its lightning arrester is protected and circuit be subjected to the be hit number of times of voltage of thunder situation and lightning arrester; thereby can infer its degree of aging, so that take corresponding maintenance measure.Discharge counter tester need is used in this work, and whether the running-active status of discharge counter that is used for testing lightning arrester is normal, true and reliable so that the data that provided to be provided.But general discharge counter tester quality does not pass a test at present, very easily damages, and influences routine work.And two instrument megohmmeters and discharge counter tester that two test jobs are required are all heavier, carry inconvenience, can bring many inconvenience to maintenance test work.

Task of the present utility model provides a kind of reliable operation, easy to carry, simple and practical discharge in insulation tester, integrates the function of running-active status of the discharge counter of the insulation resistance of measuring high-tension apparatus and test lightning arrester.

For solving above-mentioned task, solution of the present utility model is: megohmmeter is transformed, utilized the Li-R2 loop of megohmmeter to connect to go up capacitor C again and form charge circuit, charge to capacitor C.The discharge counter of capacitor C and lightning arrester is formed discharge loop.

Because in above-mentioned solution, adopt the method for transforming megohmmeter, the utility model is simple in structure, adaptability is strong, economy and durability.Simultaneously, instrumental function increases, and is convenient to the tester and carries; Simplify working routine, improved work efficiency.

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Accompanying drawing is an electrical schematic diagram of the present utility model;

In the accompanying drawing: the current coil Li of power switch K, function switch K1, discharge switch K2, megohmmeter, the potential winding Lv of megohmmeter, capacitor C, additional resistance R1, current-limiting resistance R2.

Positive source connects the end of capacitor C through K, the end of another termination current-limiting resistance R2 of capacitor C, and the end of another termination megohmmeter current coil Li of R2, another termination power cathode of Li is formed charge circuit and is charged to capacitor C.When measuring the insulation resistance of high-tension apparatus, the utility model is used as megohmmeter and is used, and K1 dials to M Ω side by the megohmmeter test connection, and this moment, the electric capacity charge circuit disconnected, and capacitor C is not recharged.When the utility model was used as the use of discharge test instrument, K1 dialled the side to F, and test connection is an E point ground connection, and the F point connects the discharge counter of lightning arrester, and the discharge loop of forming by capacitor C and discharge counter discharges to reach the purpose of check discharge counter.

Claims

1, a kind of discharge in insulation tester, mainly comprise: the current coil Li of power switch K, function switch K1, discharge switch K2, megohmmeter, capacitor C, it is characterized in that: the Li--R2 loop series connection of megohmmeter is gone up capacitor C and is formed charge circuit, the discharge counter composition discharge loop of capacitor C and lightning arrester.

2, discharge in insulation tester according to claim 1, it is characterized in that: positive source connects the end of capacitor C through K, the end of another termination current-limiting resistance R2 of capacitor C, the end of another termination megohmmeter current coil Li of R2, another termination power cathode of Li.