CN201681135U - Polarity tester of current transformer - Google Patents
Polarity tester of current transformer Download PDFInfo
- Publication number
- CN201681135U CN201681135U CN2010201874293U CN201020187429U CN201681135U CN 201681135 U CN201681135 U CN 201681135U CN 2010201874293 U CN2010201874293 U CN 2010201874293U CN 201020187429 U CN201020187429 U CN 201020187429U CN 201681135 U CN201681135 U CN 201681135U
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- battery
- current transformer
- variable resistor
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- test lead
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Abstract
The utility model relates to a polarity tester of a current transformer, which is characterized by comprising a battery and a micro amperemeter (mu A). One end of the battery is connected with the input end of a single-pole double-throw switch (KK2) through a total switch (KK1), both output ends of the single-pole double-throw switch (KK2) are respectively used as a second test end (2) and a fourth test end (4), the other end of the battery is connected with a first variable resistor (R2) and a second variable resistor (R3), the first variable resistor (R2) and the second variable resistor (R3) are in parallel connected, the other end of the first variable resistor (R2) and the other end of the second variable resistor (R3) are respectively used as a first test end (1) and a third test end (3). Proved by multiple filed actual test experiments, the polarity tester can accurately test the polarity of elements such as current transformers, voltage transformers, discharge coils and the like in various voltage levels.
Description
Technical field
The utility model relates to a kind of current transformer polarity tester.
Background technology
Manual testing's current transformer program is as follows at present, is cooperated by three people and does experiment, and a people takes dry cell, battery plus-negative plate is connected to the two ends of current transformer primary side; Second people takes milliammeter to connect the secondary side of current transformer winding, the deflection situation of observing milliammeter.A lot of powerful volt-ampere characteristic proving installations are also arranged certainly now on the market, but these devices have a lot of functions usually, one of them function is the polarity of measuring current mutual inductor.
At least need 3 people could finish test job when adopting the manual type test, personnel's redundancy, efficient is lower, and test instrument is scattered, the wiring confusion, and the test duration is longer, the both positive and negative polarity that also might have the mistaken battery of artificial origin, thereby the polarity test result who leads to errors.And conventional device is more, all bulky mostly owing to function, Heavy Weight, and not portable, complicated operation is had relatively high expectations to field condition, and for the place that only needs the measuring current mutual inductor polarity, this is obviously very inconvenient, is not easy to carry.
The utility model content
The purpose of this utility model provides a kind of current transformer polarity tester simple in structure, easy to carry, swift to operate, can shorten the test duration, reduces the tester, increases work efficiency and the correctness of polarity test.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of current transformer polarity tester, its special feature is, comprise battery, one end of this battery is connected with the input end of a single-pole double-throw switch (SPDT) by a master switch, two output terminals of this single-pole double-throw switch (SPDT) are respectively as second test lead and the 4th test lead, the other end of described battery is connected with the second adjustable resistance with first variable resistor of a parallel connection, and the other end of this first variable resistor and the second adjustable resistance is respectively as first test lead and the 3rd test lead; Also comprise a microampere meter, the two ends of this microampere meter are respectively as the 5th test lead and the 6th test lead.
Wherein connect with a loop pilot lamp after first variable resistor and the second adjustable resistance parallel connection, and be parallel with shunt resistance at first variable resistor and these pilot lamp two ends, loop.
Wherein also comprise an illuminating lamp, this illuminating lamp is connected in parallel on the battery two ends after current-limiting resistance and pushbutton switch series connection.
Further, wherein battery is a rechargeable battery, and a charging indicator light is connected in parallel on this rechargeable battery two ends after the series connection of charger plug wire terminal.
Further, wherein loop pilot lamp, illuminating lamp and charging indicator light are light emitting diode.
Prove through repeatedly on-the-spot actual testing experiment, the utility model device can correctly be tested the polarity of elements such as each electric pressure current transformer, voltage transformer (VT), discharge coil, and volume is little, in light weight, portable strong, simple to operate, only need a people just can finish polarity test work, eliminated because the possibility of the mistaken battery plus-negative plate of artificial origin, testing efficiency and test mass are all improved greatly, compare with traditional method of testing, this device has greatly shortened the polarity test time.
Description of drawings
Accompanying drawing 1 is circuit theory diagrams of the present utility model;
Accompanying drawing 2 is circuit theory diagrams of the present utility model.
Embodiment
Come the utility model is done further detailed and complete explanation below in conjunction with accompanying drawing:
As shown in Figure 1, first test lead 1 and second test lead 2 are winding connection hole of current transformer, the 3rd test lead 3 and the 4th test lead 4 are the cable checking hole, and as shown in Figure 2, the 5th test lead 5 and the 6th test lead 6 are the secondary winding in current transformer wiring hole.
As shown in Figure 1, illuminating lamp is made up of two light emitting diode L2 and light emitting diode L3, plays the night illumination effect thereby can be installed in microampere meter uA dial plate Lower Half.Loop pilot lamp L1, effect is when winding of current transformer is connected or school line time institute school core when being same core, and the loop is connected, and loop pilot lamp L1 is lighted.Charging indicator light L4, when giving rechargeable battery BATTERY charging with charger, charging indicator light L4 is lighted.The second adjustable resistance R3 is a school line loop current-limiting resistance, and the first variable resistor R2 is a current transformer polarity test loop current-limiting resistance, and shunt resistance R1 effect is the shunting for current transformer school line test loop.Master switch KK1 is the total power switch in control school line loop, current transformer polarity test loop, and single-pole double-throw switch (SPDT) KK2 is a two-position switch, is used for switching between the line shelves summation current transformer polarity test shelves of school.Pushbutton switch S1 is a self-locking key switch, as illuminating lamp lighting loop gauge tap.Current-limiting resistance R4 then uses as illuminating lamp lighting loop current limliting.Wherein loop pilot lamp L1, illuminating lamp and charging indicator light L4 are light emitting diode.
It is the large-capacity battery of 6V that battery BATTERY adopts rated voltage, and as shown in Figure 2, microampere meter uA adopts range to be ± the microampere meter uA of 50uA, when the electric current positive flow is crossed microampere meter uA, the pointer positive deflection of microampere meter uA, when reverse direction flow is crossed microampere meter uA, the reverse deflection of the pointer of microampere meter uA.External charge device plug wire terminal is used for being connected with charging with external charger.
Principle of work of the present utility model is as follows:
The utlity model has mutual inductor polarity test and school line function, also having a subsidiary function is microampere meter uA dial plate floor light function at night.
1, current transformer polarity test function
Can the measuring current mutual inductor, the polarity of element such as voltage transformer (VT), discharge coil, be example below with the current transformer:
At first, master switch KK1 beaten in Fig. 1 perform, secondly the of the same name of a winding of current transformer terminated on second test lead 2, non-same polarity is connected on first test lead 1; Then the of the same name of secondary winding in current transformer terminated on the 5th test lead 5, non-same polarity is connected on the 6th test lead 6, during with battery main switch KK1 moment closure, electric current will flow out performing through master switch KK1---single-pole double-throw switch (SPDT) KK2 from battery positive voltage--winding of the second test lead 2---current transformer--first test lead 1---(the shunt resistance R1|| first variable resistor R2---loop pilot lamp L1)---battery terminal negative, can induce induction current this moment on the Secondary Winding of current transformer, if positive polarity, electric current can flow out from the end of the same name of secondary winding in current transformer through the 5th test lead 5----microampere meter uA----the 6th test lead 6---current transformer non-polar end (microampere meter uA positive deflection); If reversed polarity, electric current can flow out through the 6th test lead 6----microampere meter uA---the 5th test lead 5---current transformer end of the same name (the reverse deflection of microampere meter uA) from the non-polar end of secondary winding in current transformer.
Here the first variable resistor R2 is the current-limiting resistance of loop pilot lamp L1, when winding of current transformer is connected, it is intact that loop pilot lamp L1 lights a winding loop wiring of expression current transformer, shunt resistance R1 adopts the 1W power resistor, during polarity test, most of electric current flows back to battery terminal negative through shunt resistance R1.
2, microampere meter uA floor light function
The current transformer polarity test many times need be carried out at night in the scene, if be not the yawing moment that is difficult to see clearly microampere meter uA by the ambient lighting instrument.Illuminating lamp is installed in the bottom of microampere meter uA gauge outfit, and when pushbutton switch S1 pressed down, illuminating lamp was lighted, and can very clearly see the yawing moment of microampere meter uA pointer at black night evening clearly.
3, school line function
During on-the-spot school line, master switch KK1 is beaten lower gear in Fig. 1, when the core school was logical,--the 4th test lead 4---core---the second adjustable resistance R3---loop pilot lamp L1---flowed into battery terminal negative to electric current through master switch KK1---master switch KK1 lower gear from the battery positive voltage outflow.The second adjustable resistance R3 is a school line loop current-limiting resistance, and when the core school led to, loop pilot lamp L1 was lighted, and expression core school is logical.
4, charge function
Accumulator that this polarity tester is joined can charge with extraneous charger, as shown in Figure 1, when accumulator inserts civil power (alternating current 220V) by charger plug wire terminal and is connected with the portable type current transformer polarity tester when good, charging indicator light L4 is lighted, and the expression accumulator positive is in charging.
Claims (5)
1. current transformer polarity tester, it is characterized in that: comprise battery (BATTERY), one end of this battery (BATTERY) is connected with the input end of a single-pole double-throw switch (SPDT) (KK2) by a master switch (KK1), two output terminals of this single-pole double-throw switch (SPDT) (KK2) are respectively as second test lead (2) and the 4th test lead (4), the other end of described battery (BATTERY) is connected with the second adjustable resistance (R3) with first variable resistor (R2) of a parallel connection, and the other end of this first variable resistor (R2) and the second adjustable resistance (R3) is respectively as first test lead (1) and the 3rd test lead (3); Also comprise a microampere meter (uA), the two ends of this microampere meter (uA) are respectively as the 5th test lead (5) and the 6th test lead (6).
2. current transformer polarity tester as claimed in claim 1, it is characterized in that: wherein connect with a loop pilot lamp (L1) in first variable resistor (R2) and the second adjustable resistance (R3) back in parallel, and be parallel with shunt resistance (R1) at first variable resistor (R2) and this loop pilot lamp (L1) two ends.
3. current transformer polarity tester as claimed in claim 1 is characterized in that: wherein also comprise an illuminating lamp, this illuminating lamp is connected in parallel on battery (BATTERY) two ends after current-limiting resistance (R4) and a pushbutton switch (S1) series connection.
4. as any described current transformer polarity tester in the claim 1 to 3, it is characterized in that: wherein battery (BATTERY) is a rechargeable battery, and a charging indicator light (L4) is connected in parallel on this rechargeable battery two ends after the series connection of charger plug wire terminal.
5. as any described current transformer polarity tester in the claim 1 to 3, it is characterized in that: wherein loop pilot lamp (L1), illuminating lamp and charging indicator light (L4) are light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201874293U CN201681135U (en) | 2010-05-14 | 2010-05-14 | Polarity tester of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201874293U CN201681135U (en) | 2010-05-14 | 2010-05-14 | Polarity tester of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201681135U true CN201681135U (en) | 2010-12-22 |
Family
ID=43346175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201874293U Expired - Fee Related CN201681135U (en) | 2010-05-14 | 2010-05-14 | Polarity tester of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201681135U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592472A (en) * | 2012-08-15 | 2014-02-19 | 国网辽宁省电力有限公司大连供电公司 | A connecting line dedicated to current transformer tests |
| CN103884958A (en) * | 2014-04-16 | 2014-06-25 | 国家电网公司 | Polarity tester of current transformer |
| CN105137276A (en) * | 2015-08-24 | 2015-12-09 | 国家电网公司 | CT polarity testing device |
| CN110687482A (en) * | 2019-11-05 | 2020-01-14 | 国网山西省电力公司阳泉供电公司 | Visual secondary circuit comprehensive detector |
-
2010
- 2010-05-14 CN CN2010201874293U patent/CN201681135U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592472A (en) * | 2012-08-15 | 2014-02-19 | 国网辽宁省电力有限公司大连供电公司 | A connecting line dedicated to current transformer tests |
| CN103884958A (en) * | 2014-04-16 | 2014-06-25 | 国家电网公司 | Polarity tester of current transformer |
| CN105137276A (en) * | 2015-08-24 | 2015-12-09 | 国家电网公司 | CT polarity testing device |
| CN105137276B (en) * | 2015-08-24 | 2017-12-12 | 国家电网公司 | CT polarity test devices |
| CN110687482A (en) * | 2019-11-05 | 2020-01-14 | 国网山西省电力公司阳泉供电公司 | Visual secondary circuit comprehensive detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101222 Termination date: 20160514 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |