CN102445623A

CN102445623A - Portable current transformer polarity tester

Info

Publication number: CN102445623A
Application number: CN2011104098429A
Authority: CN
Inventors: 董武亮; 熊乐乐; 陈永骥; 王耀方; 宗克辉; 孙道麟; 吴昆仑
Original assignee: Luoyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Current assignee: Luoyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Priority date: 2011-12-12
Filing date: 2011-12-12
Publication date: 2012-05-09

Abstract

The invention relates to a portable current transformer polarity tester which can be used for solving the problems of complex structure, large size, poor portability and high test labor intensity of a polarity test device. In the tester, a slide rheostat is arranged on a shell, and a test circuit is arranged in the shell; the test circuit comprises a direct current circuit; one end of the direct current power supply is connected with the slide rheostat; one end of the slide rheostat is connected with a first socket arranged on the shell; the other end of the direct current power supply is connected with the P1 end of a primary wiring terminal of a current transformer, and the P2 end of the primary wiring terminal of the current transformer is connected with a second socket arranged on the shell; light emitting diodes VD1 and VD2 which are connected in parallel are connected between the S1 end and S2 end of a secondary wiring terminal of the current transformer; light emitting diodes VD3 and VD4 which are connected in parallel are arranged in the shell; two ends of the light emitting diodes VD3 and VD4 are connected with a third socket and a fourth socket; and light emitting tubes of the light emitting diodes VD1, VD2, VD3 and VD4 are arranged in fixed holes on the shell. The portable current transformer polarity tester has the advantages of small size and convenience in operation.

Description

The portable type current transformer polarity tester

One, technical field

The present invention relates to electrical measuring device, particularly a kind of portable type current transformer polarity tester.

Two, background technology

The testing apparatus of existing measurement current transformer polarity; The general electric current that uses strong current generator to produce 50A to 150A feeds current transformer primary connection post to be tested; From the secondary connection post projected current of current transformer to be tested, confirm current transformer polar orientations to be tested through contrast both sides current phase, owing to the reason of measuring now on the polarity apparatus structure; Cause proving installation exist volume greatly, too heavy, be unfavorable for carrying and the problem of practical applications trouble.

Three, summary of the invention

To above-mentioned situation; For overcoming the defective of prior art; The present invention's purpose just provides a kind of portable type current transformer polarity tester, can effectively solve existing polarity test device complex structure, big, the portable difference of volume and the big problem of tester's labour intensity.

The technical scheme of its solution is, comprises housing, and slide rheostat R is arranged on the housing; Test circuit is arranged in the housing; Said test circuit comprises direct supply, a termination slide rheostat R of direct supply, and the termination of slide rheostat R has first socket that places on the housing; The primary connection post P1 end of another termination current transformer Ta1 of direct supply; Be connected to second socket that places on the housing on the primary connection post P2 end of current transformer Ta1, be connected between the S1 of the secondary connection post of current transformer Ta1, the S2 end two parallel connections and opposite polarity light emitting diode VD1, VD2, have in the housing two parallel connections and opposite polarity light emitting diode VD3, VD4; The light emitting diode VD3 of parallel connection, the two ends of VD4 are connected to the 3rd socket and the 4th socket that places on the housing respectively; The luminotron of light emitting diode VD1, VD2, VD3, VD4 places in the fixed orifice on the housing, and stretches out outside, and the switch that places housing one side is arranged on the lead of test circuit.

Volume of the present invention is little, easy to operate, flexible, is the innovation on the current transformer volt-ampere characteristic proving installation.

Four, description of drawings

Fig. 1 is a vertical view of the present invention.

Fig. 2 is a test circuit use principle connection layout of the present invention.

Five, embodiment

Explain further details below in conjunction with the accompanying drawing specific embodiments of the invention.

Provide by Fig. 1, Fig. 2, the present invention includes housing, slide rheostat R is arranged on the housing 1; In the housing 1 test circuit is arranged; Said test circuit comprises direct supply 2, a termination slide rheostat R of direct supply 2, and the termination of slide rheostat R has first socket 3 that places on the housing 1; The primary connection post P1 end of another termination current transformer Ta1 of direct supply 2; Be connected to second socket 4 that places on the housing 1 on the primary connection post P2 end of current transformer Ta1, be connected between the S1 of the secondary connection post of current transformer Ta1, the S2 end two parallel connections and opposite polarity light emitting diode VD1, VD2, have in the housing 1 two parallel connections and opposite polarity light emitting diode VD3, VD4; The light emitting diode VD3 of parallel connection, the two ends of VD4 are connected to the 3rd socket 5 and the 4th socket 6 that places on the housing 1 respectively; The luminotron of light emitting diode VD1, VD2, VD3, VD4 places in the fixed orifice 7 on the housing 1, and stretches out housing 1 outside, and the switch 8 that places housing 1 one sides is arranged on the lead of test circuit.

In order to guarantee result of use, two square hollow rectangle frames constituted about said housing 1 was served as reasons.

Current transformer Ta1 of the present invention is a standard current transformer, during use, the primary connection post P1 of current transformer Ta2 to be measured is connect second socket 4; P2 termination first socket 3, the secondary connection post S1 of current transformer Ta2 to be measured, S2 connect the 3rd socket 5 and the 4th socket 6 respectively, and light emitting diode VD3, VD4 are inserted on the current transformer Ta2 to be measured; Because the current transformer equivalence model is small-sized mutual inductor, its resistance is less, can ignore; Through changing the resistance of slide rheostat R, regulate the direction that feeds transformer current, promptly electric current increases or reduces; Owing to use direct supply,, can not take a turn for the worse so the changes of magnetic field of mutual inductor is a unidirectional in change procedure; Consequent secondary current also is a direct current, flows to through judging DC current, can draw the polarity of the electric current of to-be-tested transformer; The bright lamp situation of the light emitting diode that is connected to through observation caliber current transformer TA1 and current transformer TA2 to be measured is judged to be specially the polarity of current transformer to be measured; Simultaneously glittering as lamp A (VD1) and lamp C (VD3), or lamp B (VD2) is simultaneously glittering with lamp D (VD4), and to-be-tested transformer is the subtractive polarity mode; Simultaneously glittering as lamp A (VD1) and lamp D (VD4), or lamp A (VD1) is simultaneously glittering with lamp C (VD3), and to-be-tested transformer is the additive polarity mode.

Volume of the present invention is little, and hand-held convenient, owing to adopt direct supply, security improves greatly, and through testing contrast with existing apparatus, experiment shows error free, meets the electric system requirement, is the innovation on the current transformer polarity test device.

Claims

1. portable type current transformer polarity tester; Comprise housing, it is characterized in that housing has slide rheostat R on (1); Housing has test circuit in (1); Said test circuit comprises direct supply (2), a termination slide rheostat R of direct supply (2), and the termination of slide rheostat R has first socket (3) that places on the housing (1); The primary connection post P1 end of another termination current transformer Ta1 of direct supply (2); Be connected to second socket (4) that places on the housing (1) on the primary connection post P2 end of current transformer Ta1, be connected between the S1 of the secondary connection post of current transformer Ta1, the S2 end two parallel connections and opposite polarity light emitting diode VD1, VD2, have in the housing (1) two parallel connections and opposite polarity light emitting diode VD3, VD4; The light emitting diode VD3 of parallel connection, the two ends of VD4 are connected to the 3rd socket (5) and the 4th socket (6) that places on the housing (1) respectively; The luminotron of light emitting diode VD1, VD2, VD3, VD4 places in the fixed orifice (7) on the housing (1), and stretches out housing (1) outside, and the switch (8) that places housing (1) one side is arranged on the lead of test circuit.

2. portable type current transformer polarity tester according to claim 1 is characterized in that, two square hollow rectangle frames constituted about said housing (1) was served as reasons.