CN2232145Y

CN2232145Y - Movable high voltage insulation test meter

Info

Publication number: CN2232145Y
Application number: CN 95233751
Authority: CN
Inventors: 刘光辉; 柏立俊; 崔蒲章
Original assignee: QINGDO ELECTRIC POWER BUREAU
Current assignee: QINGDO ELECTRIC POWER BUREAU
Priority date: 1995-04-26
Filing date: 1995-04-26
Publication date: 1996-07-31
Anticipated expiration: 2005-04-26

Abstract

The utility model discloses a movable high-voltage insulating tester, which is formed by that a container is provided with a high-voltage device assembly, an electric bridge, an operating board and a test controlling circuit inside; the bottom of the box body is provided with a movable wheel; the high-voltage device assembly is formed by that a closed vessel filled with SF6 gas is provided with a high-voltage change-over switch, etc. inside. The utility model has the advantages of complete function, strong integrity, safety, simple and convenient operation, etc., and due to the high-voltage change-over switch, the tester can simultaneously measure the dielectric loss angle and the DC leakage current; the two kinds of test can be automatically changed over; the utility model which has the function of automatic discharge can automatically change over positive and inverse wiring measurement; simultaneously, high-voltage equipment is arranged in the closed vessel; the high voltage is leaded out by a cable, avoiding the danger of electric shock in operation; the tester is used for the high-voltage insulation test of the substation 220KV or below in an electric power system.

Description

Portable High-Voltage Insulation tester

The utility model relates to power test equipment, more particularly is the portable High-Voltage Insulation testing tool about the Insulation Test special use of electric system 220KV and following transformer station.

Usually 220KV that people carry out and following converting station electric power Insulation Test mainly refer to measuring media angle of loss and dc leakage-current test, their test is to use different equipment, adopt different mode of connections, separate test, during test, because equipment is discrete, the position of band high-tension electricity is many, and can't cover, the personnel that cause easily get an electric shock or equipment discharges and damage equipment over the ground; Time spent also will be transported to the testing equipment that separates respectively carries out wiring after test site sets, outage rewiring during thread-changing, still will dismantle after using up, carrying etc. brought trouble for whole test job, wasted a large amount of setup times simultaneously, work efficiency is lower, the requirement of extremely inapplicable present high-tension electricity Insulation Test.

The purpose of this utility model be to provide a kind of have multiple functional, strong, the safe and reliable portable High-Voltage Insulation tester easy and simple to handle of globality, especially adopt the high pressure change-over switch, make this tester can possess the function of measuring media angle of loss and dc leakage-current simultaneously, realized can changing automatically between two kinds of tests, the measurement of positive and negative line can automatically switch, and automatic function such as discharge, this instrument also all is contained in high-tension apparatus in the closed container, adopt cable that high voltage is drawn, the danger of getting an electric shock in avoiding operating.

Portable High-Voltage Insulation tester of the present utility model is high-tension unit assembly, electric bridge, operation board to be housed in casing and to connect test control circuit between each parts, pacifying mobile wheel in the bottom of casing, can move this instrument arbitrarily when easy to use, this test control circuit is drawn high-tension electricity insertion high-tension unit assembly with umbilical cable and is gone to control the work of high-tension unit assembly by operation board, draw terminals from the high-tension unit assembly and be connected with tested product with electric bridge respectively, wherein electric bridge is selected the QS-1 electric bridge for use; Operation board be equipped with Displaying Meter be A.C. voltmeter, alternating current ammeter, D.C. voltmeter, DC ammeter, voltage-selected switch, current selected switch, functional select switch promptly: dc leakage-current, dielectric loss angle comprise positive and negative wiring, discharging function, and the test function of this tester is to be that to have be loops such as boosting of constituting of components and parts such as resistance, electric capacity, diode, relay, travel switch, control motor, pressure regulator, transformer, button, rectification, sampling, discharge, positive and negative wiring by this test circuit that test control circuit is realized; At the casing that high-tension unit assembly one side is housed is movable plate washer, and dismounting high-tension unit assembly is convenient when being convenient to keep in repair.

Described high-tension unit assembly is that rectification stepup transformer, transformer, high pressure change-over switch, sample resistance etc. are housed in the closed container that is filled with SF6 gas, from interior barometer, umbilical cable socket, electric bridge terminals, the tested product terminals of leading to, wherein the rectification stepup transformer is that 4 voltage-doubler rectifiers be about to hand over are annotated electric rectification and become direct current and voltage is raise 4 times at the closed container top; The transformer step-up transformer is about to 220V voltage and is raised to 10000V; It is that the voltage value of gathering is delivered to test instrumentation that sampling resistor is placed on the rectification stepup transformer.

Described high pressure change-over switch is to drive the upper, middle and lower-ranking change-over switch moving contact of insulation each other by motor coaxle, it is enclosed within the insulating cylinder, comprise positive wiring and reversal connection line, discharging function at insulation has on the barrel with moving contact is used finish direct current, exchange, just can realize measuring behind the stationary contact of functions such as discharge, positive wiring, the output of reversal connection line, contacting direct current earial drainage, dielectric loss angle, wherein upper and lower layer switch moving contact is a single armed, middle level switch moving contact is both arms, and moving contact drives with stationary contact with motor coaxle and is used; Evenly distributed on the top of insulating cylinder have a positive wiring, discharge, direct current, the stationary contact of reversal connection line constitutes the upper strata switch with upper strata single armed moving contact, evenly distributed at the middle part of insulating cylinder have an interchange, output, direct current, the stationary contact of output and middle level both arms moving contact constitute the middle level switch, bottom in insulating cylinder is evenly distributed positive wiring, discharge, the reversal connection line, the stationary contact of ground connection and lower floor's single armed moving contact constitute lower floor's switch, earlier the selector switch on the operation board is chosen the electric current of test request, behind the magnitude of voltage, stir functional select switch, drive the switching of switch contact by the rotation of control motor, along with motor forwards different positions to, the moving contact of three layers of switch just can switch on the stationary contact of difference in functionality and connect, and realizes the direct current earial drainage, dielectric loss angle comprises the measurement of positive wiring and reversal connection line discharging function.

Further specify the course of work of high pressure change-over switch in conjunction with test.

Change when losing angle test (positive wiring) when carrying out medium, functional switch on the operation board is got in " positive wiring ", the control motor forwards " positive wiring " position to: this moment, upper and lower layer switch forwarded the position of " positive wiring " to, make measurement circuit form positive connection circuit, then the middle level switch forwards on " interchange " and " output " two positions, constitute the interchange output loop, testing crew is measured and reading.

When carrying out dielectric loss angle test (reversal connection line), functional switch is got on " reversal connection line ", when the control motor forwards " reversal connection line " position to, upper and lower layer switch moving contact forwards the stationary contact position of " reversal connection line " to, measurement circuit will constitute the reversal connection line loop, the middle level switch then forwards " interchange " and " output " two positions to, constitutes to exchange output loop, and testing crew is measured and reading.

When carrying out the test of direct current earial drainage, functional switch on the operation board is got on " earial drainage ", the control motor forwards " earial drainage " position to, the upper strata switch forwards the position of " direct current " to, constitute direct current earial drainage loop, the middle level switch is then connected " direct current " and " output " position and is constituted the direct current output loop, and testing crew is measured and reading; When needing discharge after having tested, functional switch is got to the position of " discharge ", the control motor forwards upper and lower layer switch connection " discharge " position, " discharge " position, the discharge loop in the forming circuit to.

Portable High-Voltage Insulation tester is owing to adopt the high pressure change-over switch, reached the effect that possesses measuring media angle of loss and dc leakage-current simultaneously, realized can changing automatically between two kinds of tests, the measurement of positive and negative wiring can automatically switch, and automatic function such as discharge, this instrument also all is contained in high-tension apparatus in the closed container, adopting cable that high voltage is drawn, avoided the danger of getting an electric shock in the operation, is desirable high voltage test instrumentation.Description of drawings:

Fig. 1: portable High-Voltage Insulation tester structural representation (overlooking)

Fig. 2: portable High-Voltage Insulation tester structural representation (main looking)

Fig. 3: high pressure Switch structure synoptic diagram (overlooking)

Fig. 4: A-A cut-open view among Fig. 3

Fig. 5: portable High-Voltage Insulation tester circuit diagram

Fig. 6: portable High-Voltage Insulation tester measurement system diagram

1-electric bridge 2-operation board 3-high-tension unit assembly 4-casing

5-moves wheel 6-rain glass 7-cable socket 8-electric bridge terminals

The tested product terminals of 9-10-rectification stepup transformer 11-transformer

12-high pressure change-over switch 13-airtight container 14-upper strata switch moving contact

14 '-switch stationary contact 15-middle level, upper strata switch moving contact

15 '-middle level switch stationary contact 16-lower floor switch moving contact

16 '-the switch stationary contact 17-of lower floor insulating cylinder 18-motor

The R1-sample resistance R2-current-limiting resistance R3-resistance of discharging

Claims

1, a kind of portable High-Voltage Insulation tester, electric bridge, operation board are housed in casing, it is characterized in that the high-tension unit assembly also is housed and connect test control circuit between each parts, under casing, be equipped with and move wheel, wherein draw high-tension electricity and insert the high-tension unit assembly with umbilical cable, by operation board control high-tension unit assembly, draw terminals from the high-tension unit assembly and be connected with tested product with electric bridge respectively.

2, portable high electric insulation tester as claimed in claim 1, it is characterized in that described high-tension unit assembly is that rectification increasing apparatus, transformer, high pressure change-over switch are housed in the airtight container that is filled with SF6 gas, row has barometer, umbilical cable socket, electric bridge terminals, tested product terminals at the airtight container top.

3, high-tension unit assembly as claimed in claim 2, it is characterized in that described high pressure change-over switch is the moving contact that drives the change-over switch of upper, middle and lower-ranking insulation with motor coaxle, be enclosed within the insulating cylinder, have the stationary contact of connecting direct current, interchange, discharge, positive wiring, reversal connection line, output function on this insulation barrel, wherein upper and lower layer switch moving contact is the single armed contact, and middle level switch moving contact is the both arms contact.