CN201540345U - Mutual inductor polarity wired tester - Google Patents
Mutual inductor polarity wired tester Download PDFInfo
- Publication number
- CN201540345U CN201540345U CN2009202847731U CN200920284773U CN201540345U CN 201540345 U CN201540345 U CN 201540345U CN 2009202847731 U CN2009202847731 U CN 2009202847731U CN 200920284773 U CN200920284773 U CN 200920284773U CN 201540345 U CN201540345 U CN 201540345U
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- CN
- China
- Prior art keywords
- mutual inductor
- inductor polarity
- phase comparator
- polarity
- polarity tester
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a mutual inductor polarity wired tester, comprising a square-wave generator, a power amplifier circuit, a reshaper and a phase comparator, wherein the square-wave generator is connected with the power amplifier circuit; the reshaper is connected with the phase comparator; the square-wave generator is connected with the phase comparator; the power amplifier and the reshaper are all provided with wiring terminals. The inner part of the mutual inductor polarity wired tester is provided with a filter, a result presentation device, wherein the filter is connected with the phase comparator; the result presentation device is connected with the back of the filter to correspond with the result of the phase comparator. The inner part of the mutual inductor polarity wired tester is provided with a rechargeable battery without other external power supply. The mutual inductor polarity wired tester supplies the power using a large-capacity rechargeable battery. When the battery voltage is relative low, the instrument panel has under-voltage indication to prevent the instrument from being unworkable due to over-discharge of the built-in battery.
Description
Technical field
The utility model relates to a kind of mutual inductor polarity tester, and the wired tester of particularly a kind of mutual inductor polarity belongs to electrical technology field.
Background technology
Current transformer should carry out polarity test before and after handing-over and overhaul; in case it is when wiring that polarity is mistaken; cause on relay protection circuit and measurement loop in cause the protective device malfunction and can not be correct measure, so must before putting into operation, do polarity test.
The method of polarity of measuring current transformer is a lot, and we have following two kinds of test methods what work was adopted often: 1. DC-method; 2. AC method.
1 DC-method
See accompanying drawing 3.Its positive pole is connected to the primary winding L1 of mutual inductor with 1.5～3V dry cell, L2 connects negative pole, the secondary side K1 of mutual inductor connects the milliammeter positive pole, negative pole meets K2, after carefully connecting the wire,, draw back back milliammeter pointer negative bias with the K milliammeter pointer positively biased of closing, illustrate that the termination that mutual inductor is connected on the anode is a same polarity with the termination that is connected on the milliammeter anode, promptly L1, K1 are that same polarity is that mutual inductor is a subtractive polarity.As the beat of pointer with above-mentioned opposite be additive polarity.
2 AC method
See accompanying drawing 4, the L2 and the secondary side K2 of current transformer first and second coil coupled together with lead, pass to the alternating voltage (using little range) of 1～5V, measure the numerical value of U2 and U3 if U3=U1-U2 is a subtractive polarity with the following voltage table of 10V at secondary side.
U3=U1+U2 is an additive polarity.Attention: in process of the test, as far as possible make feeding voltage low, in order to avoid the too big damage coil of electric current, know voltage table for reading selects smaller as far as possible, transformer ratio 5 adopt when following AC method measure fairly simple accurately, transformer ratio surpassed 10 mutual inductor and do not adopt this method to measure, because the numerical value of the less U3 of the numerical value of U2 and U1 is approaching, it is big or small that the reading of voltage table is difficult for difference, so bad distinguishing when measuring generally should not adopt this method to measure polarity.
Be not difficult to find out at above mutual inductor polarity testing feature:
Method 2 needs 3 voltage tables or measures respectively 3 times, and operation bothers and also needs to calculate and just can obtain the result.
The utility model content
The utility model purpose is to provide a kind of mutual inductor polarity wired tester in order to overcome the deficiencies in the prior art.
For achieving the above object, the technical solution adopted in the utility model is: the wired tester of a kind of mutual inductor polarity comprises square-wave generator, power amplifier, reshaper, phase comparator; Described square-wave generator links to each other with power amplifier; Described reshaper links to each other with phase comparator; Described square-wave generator links to each other with phase comparator; Described power amplifier, reshaper all are provided with Wiring port.
Preferably, the inside of the wired tester of described mutual inductor polarity also includes a wave filter, results suggest device; Described wave filter links to each other with phase comparator; Described results suggest device is connected the wave filter back and makes corresponding to the result of phase comparator.
Preferably, the inside of the wired tester of described mutual inductor polarity also includes a rechargeable battery, works under the situation of dispense with outer connecting power again.
Preferably, the inside of the wired tester of described mutual inductor polarity also includes under-voltage indicator, and when cell voltage was low, operating personnel were reminded in described under-voltage indicator work, prevents that internal battery from can not work because of overdischarge causes instrument.
Preferably, the results suggest device is the LED lamp of two kinds of different colours; A kind of result of the bright representative of the lamp of every kind of color.
Preferably, the results suggest device is two kinds of beep generator; Every kind of buzzer is represented a kind of result.
Because the utilization of technique scheme, the present invention compared with prior art has following advantage:
The wired tester of the present invention program's mutual inductor polarity adopts the power supply of built-in high capacity rechargeable battery and when cell voltage was low, instrument panel owed end finger and shows, prevents that internal battery from can not work because of overdischarge causes instrument; The mutual inductor polarity test mode is: the square wave that is produced frequency adjustable by waveform generator, through power amplifier it is become the adjustable square-wave signal of amplitude, feed this frequency and the adjustable square-wave signal of amplitude to the more side winding of the mutual inductor number of turn, then from the less relatively winding acquired signal of the mutual inductor opposite side number of turn, the waveform that produces with square-wave generator after the signal shaping that collects is carried out bit comparison mutually, with the waveform that obtains after relatively carry out filtering, window relatively wait handle after, draw polar relationship by lighting LED and driving the hummer sounding.
Description of drawings
Below in conjunction with accompanying drawing technical solutions of the utility model are described further:
Accompanying drawing 1 is the theory diagram of the utility model mutual inductor polarity tester;
Accompanying drawing 2 is the panel figure of the utility model mutual inductor polarity tester;
Accompanying drawing 3 is surveyed the circuit diagram of current transformer polarity for DC-method;
Accompanying drawing 4 is surveyed the circuit diagram of current transformer polarity for AC method;
Wherein: 1, to-be-tested transformer.
Embodiment
The wired tester of a kind of mutual inductor polarity described in the utility model comprises square-wave generator, power amplifier, reshaper, phase comparator; Described square-wave generator links to each other with power amplifier; Described reshaper links to each other with phase comparator; Described square-wave generator links to each other with phase comparator; Described power amplifier, reshaper all are provided with Wiring port; The inside of the wired tester of described mutual inductor polarity also includes a wave filter, results suggest device; Described wave filter links to each other with phase comparator; Described results suggest device is connected the wave filter back and makes corresponding to the result of phase comparator; The inside of the wired tester of described mutual inductor polarity also includes a rechargeable battery, works under the situation of dispense with outer connecting power again; The inside of the wired tester of described mutual inductor polarity also includes under-voltage indicator, and when cell voltage was low, operating personnel were reminded in described under-voltage indicator work, prevents that internal battery from can not work because of overdischarge causes instrument; The results suggest device is the LED lamp of two kinds of different colours; A kind of result of the bright representative of the lamp of every kind of color; The results suggest device also can be two kinds of beep generator; Every kind of buzzer is represented a kind of result.
Its course of work is as follows: it is corresponding continuous that the to-be-tested transformer 1 of polarity to be measured and mutual inductor polarity tester press label " L1, L2, K1, K2 " (or " A, X, a, x ") by 4 leads, frequency modulation, the adjusting pressuring knob of mutual inductor polarity tester are transferred to the end counterclockwise, the frequency of output terminal " K1, K2 (or A, X) " output waveform of polarity tester is the highest at this moment, and voltage is minimum.Turn on the power switch, regulate clockwise adjusting pressuring knob until the polarity indication LED of polarity tester lighted, the hummer sounding, can know the polarity of mutual inductor this moment according to LED and hummer.
Annotate: the effect of fm dial is: clockwise adjusting knob, and the frequency of the output terminal of polarity tester " K1, K2 (or A, X) " output waveform can reduce, and output loop induction reactance is reduced, and loop current increases.It also is the output loop reactance (or electric current) that frequency modulation can change polarity tester.
Because the utilization of technique scheme, the present invention compared with prior art has following advantage:
The wired tester of the mutual inductor polarity of the utility model scheme adopts the power supply of built-in high capacity rechargeable battery and when cell voltage was low, instrument panel owed end finger and shows, prevents that internal battery from can not work because of overdischarge causes instrument; The mutual inductor polarity test mode is: the square wave that is produced frequency adjustable by waveform generator, through power amplifier it is become the adjustable square-wave signal of amplitude, feed this frequency and the adjustable square-wave signal of amplitude to the more side winding of the mutual inductor number of turn, then from the less relatively winding acquired signal of the mutual inductor opposite side number of turn, the waveform that produces with square-wave generator after the signal shaping that collects is carried out bit comparison mutually, with the waveform that obtains after relatively carry out filtering, window relatively wait handle after, draw polar relationship by lighting LED and driving the hummer sounding.
Below only be concrete exemplary applications of the present utility model, protection domain of the present utility model is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, or any to move mode dull and stereotyped described in the utility model, all drop within the utility model rights protection scope.
Claims (6)
1. a mutual inductor polarity tester is characterized in that: comprise square-wave generator, power amplifier, reshaper, phase comparator; Described square-wave generator links to each other with power amplifier; Described reshaper links to each other with phase comparator; Described square-wave generator links to each other with phase comparator; Described power amplifier, reshaper all are provided with Wiring port.
2. mutual inductor polarity tester according to claim 1 is characterized in that: the inside of described mutual inductor polarity tester also includes a wave filter, results suggest device; Described wave filter links to each other with phase comparator; Described results suggest device is connected the wave filter back and makes corresponding to the result of phase comparator.
3. mutual inductor polarity tester according to claim 1 is characterized in that: the inside of described mutual inductor polarity tester also includes a rechargeable battery, works under the situation of dispense with outer connecting power again.
4. mutual inductor polarity tester according to claim 1, it is characterized in that: the inside of described mutual inductor polarity tester also includes under-voltage indicator, when cell voltage is low, described under-voltage indicator work, remind operating personnel, prevent that internal battery from can not work because of overdischarge causes instrument.
5. mutual inductor polarity tester according to claim 2 is characterized in that: the results suggest device is the LED lamp of two kinds of different colours; A kind of result of the bright representative of the lamp of every kind of color.
6. mutual inductor polarity tester according to claim 2 is characterized in that: the results suggest device is two kinds of beep generator; Every kind of buzzer is represented a kind of result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202847731U CN201540345U (en) | 2009-12-07 | 2009-12-07 | Mutual inductor polarity wired tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202847731U CN201540345U (en) | 2009-12-07 | 2009-12-07 | Mutual inductor polarity wired tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201540345U true CN201540345U (en) | 2010-08-04 |
Family
ID=42591806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202847731U Expired - Fee Related CN201540345U (en) | 2009-12-07 | 2009-12-07 | Mutual inductor polarity wired tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201540345U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435907A (en) * | 2011-10-31 | 2012-05-02 | 许继集团有限公司 | Polarity test method for electronic current transformer |
| CN103389483A (en) * | 2013-07-26 | 2013-11-13 | 国家电网公司 | System and method for calibrating polarity of current transformer |
| CN104133154A (en) * | 2013-05-03 | 2014-11-05 | 武汉凯默电气有限公司 | Intelligent substation current transformer polarity test method and device |
-
2009
- 2009-12-07 CN CN2009202847731U patent/CN201540345U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435907A (en) * | 2011-10-31 | 2012-05-02 | 许继集团有限公司 | Polarity test method for electronic current transformer |
| CN104133154A (en) * | 2013-05-03 | 2014-11-05 | 武汉凯默电气有限公司 | Intelligent substation current transformer polarity test method and device |
| CN104133154B (en) * | 2013-05-03 | 2016-12-28 | 武汉凯默电气有限公司 | A kind of intelligent substation current transformer polarity testing method and device |
| CN103389483A (en) * | 2013-07-26 | 2013-11-13 | 国家电网公司 | System and method for calibrating polarity of current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SUZHOU HUADIAN ELECTRIC CO., LTD. Free format text: FORMER NAME: SUZHOU HUADIAN ELECTRIC TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Good East Industrial Park Wuzhong Economic Development Zone Suzhou city Jiangsu province 215124 Pu Road No. 255 Patentee after: Suzhou Huadian Electric Co., Ltd. Address before: Good East Industrial Park Wuzhong Economic Development Zone Suzhou city Jiangsu province 215124 Pu Road No. 255 Patentee before: Suzhou Huadian Electric Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100804 Termination date: 20141207 |
|
| EXPY | Termination of patent right or utility model |