CN104849611A - Polarity test system of current transformer - Google Patents
Polarity test system of current transformer Download PDFInfo
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- CN104849611A CN104849611A CN201510202231.5A CN201510202231A CN104849611A CN 104849611 A CN104849611 A CN 104849611A CN 201510202231 A CN201510202231 A CN 201510202231A CN 104849611 A CN104849611 A CN 104849611A
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Abstract
The invention discloses a polarity test system of a current transformer. The primary and secondary sides of the current transformer are placed at positions of a switch and a protector respectively. The system comprises a remote controller, a control box and an ammeter, wherein the control box is connected to the remote controller in a wireless manner, the control box is connected with the primary side, placed at the position of the switch, of the current transformer via a first test wire; and the ammeter is connected with the secondary side, placed at the position of the protector, of the current transformer via a second test wire. The polarity test system disclosed by the invention can effectively improve the accuracy of polarity test of the current transformer.
Description
Technical field
The present invention relates to technical field of electric power, particularly relate to a kind of current transformer polarity testing system.
Background technology
In order to ensure power system security economical operation, monitoring and measuring must be carried out to the ruuning situation of power equipment.But general measurement and protective device directly can not access a high-tension apparatus, and need the big current scaling transformation of primary system to become small area analysis, supply measurement instrument and protective device use, and this has just used current transformer.
The polarity of current transformer refers to that a certain moment primary side polarity is identical with secondary side one end polarity, is namely be just or simultaneously negative simultaneously, claims this polarity to be homopolar end or Same Name of Ends.In electric system O&M reality, determine that the polarity of current transformer is extremely necessary.In current technology; when carrying out whole group of test (wiring namely from position of the switch current transformer primary side to Current Transformer Secondary side, protective device position) to current transformer; need to have been come by least two people; wherein, at least one people, such as A utilizes intercom to pass on the Test Switchboard state of primary side; comprise opening and closing; at least one people, such as B observes the situation of change of milliammeter at secondary side, then judges the polarity of current transformer.
But, the situation of this test that cooperatively interacted by least two people of the prior art, error rate is higher, such as, above-mentioned B mishears the Test Switchboard state of primary side that A passes on, and so B is again in conjunction with the situation of change of oneself viewed milliammeter, can draw the antipodal conclusion with reality.
Summary of the invention
In view of this, the invention provides a kind of current transformer polarity testing system, apply the accuracy rate that current transformer polarity testing system provided by the invention effectively can improve current transformer polarity testing.
For achieving the above object, the invention provides following technical scheme:
A kind of current transformer polarity testing system, the primary side of described current transformer is arranged on the position of the switch, and secondary side is arranged on protective device position, and described system comprises:
Telepilot, the control box be wirelessly connected with described telepilot, and reometer;
Described control box is connected by the first p-wire with the current transformer primary side of the described position of the switch; The first end of described first p-wire comprises the first link and the second link, described first link is connected with one end of the current transformer primary side of the described position of the switch, and described second link is connected with the other end of the current transformer primary side of the described position of the switch; Second end of described first p-wire comprises the 3rd link, and described 3rd link is connected with the electric current output block of described control box, and described electric current output block is arranged on the panel of described control box;
Described reometer is connected by the second p-wire with the Current Transformer Secondary side of described protective device position; The first end of described second p-wire comprises the 4th link and the 5th link, described 4th link is connected with one end of the Current Transformer Secondary side of described protective device position, and described 5th link is connected with the other end of the Current Transformer Secondary side of described protective device position; Second end of described second p-wire is connected with reometer.
Preferably, described control box comprises:
Controller, the wireless receiving circuit be connected with described controller, the relay be connected with described electric current output block, and the test power supply be connected with described electric current output block with described relay respectively.
Preferably, described control box comprises multiple described electric current output block and multiple described relay, the number of described electric current output block and described relay is equal, a described electric current output block is only connected with a corresponding unique described relay, and a described relay is only connected with a corresponding unique described electric current output block.
Preferably, described telepilot comprises:
The button of the different transmission frequency of multiple sign, the number of described button is equal with the number of described electric current output block, and described button is mechanical key or touch controlled key.
Preferably, described first link and described second link are all clamp.
Preferably, described 3rd link is plug.
Preferably, described 4th link and described 5th link are all plug.
Preferably, described reometer is bidirectional, dc reometer.
Preferably, also comprise:
Be arranged on described control box shell rear surface, the permanent magnet adsorbed with device outer surface to be tested.
Preferably, described control box also comprises:
Be connected respectively with described relay with described controller, characterize the light emitting diode lamp of described relay closes or off-state.
Known via above-mentioned technical scheme, compared with prior art, the invention provides a kind of current transformer whole group of polarity test system.After user carefully connects the wire according to technical scheme provided by the invention, to Current Transformer Secondary side position, sent by telepilot and start detection signal, control box controls the primary side output current that electric current output block is current transformer, now, user only needs the change observing reometer at the secondary side of current transformer, another one people is no longer needed to be passed on the state of Test Switchboard by intercom at the primary side of current transformer, user oneself controls to power or power-off for current transformer primary side by telepilot, therefore user oneself knows that whether current transformer primary side is in power supply very much, combine the observed change to reometer again, just the polarity of current transformer can accurately be judged.Therefore, current transformer provided by the invention whole group of polarity test system, the problem that the error rate can avoiding coordinating measuring current mutual inductor polarity to cause because of many people in prior art is higher, by the technical scheme that one man operation the present invention improves, the accuracy rate of current transformer polarity testing effectively can be improved.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The circuit principle structure figure of the current transformer polarity testing system that Fig. 1 provides for the embodiment of the present invention;
The structural drawing of a kind of current transformer polarity testing system that Fig. 2 provides for the embodiment of the present invention;
The structural drawing of the first p-wire that Fig. 3 provides for the embodiment of the present invention;
Fig. 4 for the second p-wire that the embodiment of the present invention provides be connected with reometer after structural drawing;
Fig. 5 for control box that the embodiment of the present invention provides be connected with current transformer primary side after circuit structure diagram;
The left TV structure figure of the control box that Fig. 6 provides for the embodiment of the present invention;
The plan structure figure of the control box that Fig. 7 provides for the embodiment of the present invention;
The structural drawing of the telepilot that Fig. 8 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Embodiment
Refer to Fig. 1 ~ Fig. 8, the circuit principle structure figure of the current transformer polarity testing system that Fig. 1 provides for the embodiment of the present invention; The structural drawing of a kind of current transformer polarity testing system that Fig. 2 provides for the embodiment of the present invention; The structural drawing of the first p-wire that Fig. 3 provides for the embodiment of the present invention; Fig. 4 for the second p-wire that the embodiment of the present invention provides be connected with reometer after structural drawing; Fig. 5 for control box that the embodiment of the present invention provides be connected with current transformer primary side after circuit structure diagram; The left TV structure figure of the control box that Fig. 6 provides for the embodiment of the present invention; The plan structure figure of the control box that Fig. 7 provides for the embodiment of the present invention; The structural drawing of the telepilot that Fig. 8 provides for the embodiment of the present invention.
As shown in Figure 1, its positive pole is connected to one end L1 of the primary winding of current transformer by dry cell, other end L2 connects negative pole, secondary side one end K1 of current transformer connects milliammeter positive pole, negative pole meets secondary side other end K2, after carefully connecting the wire, K to be closed milliammeter pointer positively biased, pull open rear milliammeter pointer negative bias, illustrating that current transformer is connected on termination on anode with the termination being connected on milliammeter anode is same polarity, namely L1, K1 are same polarity and current transformer is subtractive polarity (L1 and K1, L2 and K2 are respectively homopolar end).Be additive polarity as the beat of pointer is contrary to the above.
As shown in Fig. 2 ~ Fig. 8, the invention provides a kind of current transformer polarity testing system, the primary side of described current transformer is arranged on the position of the switch, and secondary side is arranged on protective device position, and described system comprises:
Telepilot 10, wirelessly (W) control box 20 of being connected with described telepilot 10, and reometer 30;
Described control box 20 is connected by the first p-wire 40 with the current transformer primary side of the described position of the switch;
The first end of described first p-wire 40 comprises the first link 401 and the second link 402, described first link 401 is connected with one end of the current transformer primary side of the described position of the switch, and described second link 402 is connected with the other end of the current transformer primary side of the described position of the switch; Second end of described first p-wire 40 comprises the 3rd link 403, and described 3rd link 403 is connected with the electric current output block 201 of described control box, and described electric current output block 201 is arranged on the panel 202 of described control box;
Described reometer 30 is connected by the second p-wire 50 with the Current Transformer Secondary side of described protective device position;
The first end of described second p-wire comprises the 4th link 501 and the 5th link 502, described 4th link 501 is connected with one end of the Current Transformer Secondary side of described protective device position, and described 5th link 502 is connected with the other end of the Current Transformer Secondary side of described protective device position; Second end of described second p-wire 50 is connected with reometer 30.
Concrete, as shown in Fig. 5 ~ Fig. 7, described control box 20 comprises:
Controller 203, the wireless receiving circuit be connected with described controller 203, the relay 204 be connected with described electric current output block 201, and the test power supply 205 be connected with described electric current output block 201 with described relay 204 respectively.
Further, described wireless receiving circuit comprises receiving antenna 206.
Further, optionally, described control box 20 comprises multiple described electric current output block 201 and multiple described relay 204, the number of described electric current output block 201 and described relay 204 is equal, a described electric current output block 201 is only connected with a corresponding unique described relay 204, and a described relay 204 is only connected with a corresponding unique described electric current output block 201.
Further, optionally, described telepilot 10 comprises:
The button of the different transmission frequency of multiple sign, the number of described button is equal with the number of described electric current output block 201, and described button is mechanical key or touch controlled key.The number of described button is equal with the number of described electric current output block 201, object is, user's disposable test many groups current transformer, namely user is disposable in primary equipment position, be connected organizing current transformer with control box 20 provided by the invention, connected mode, with reference to foregoing description, it should be noted that more, after connection, user needs the corresponding relation recording physical circuit output block and concrete current transformer.Current transformer polarity testing system provided by the invention, there is corresponding relation in the electric current output block 201 on the button of telepilot 10 and control box panel 202, the different key of telepilot 10 is provided with different numberings, the different electric current output blocks 201 of control box 20 are provided with different numberings, optionally, as Fig. 8, the button of telepilot 10 is S1 ~ S15, as Fig. 7, the plan structure figure of control box 20 is the structural drawing of control box panel 202, control box panel 202 is provided with 15 jacks of arabic numeral 1 ~ 15, optionally, technical scheme provided by the invention, described electric current output block 201 is female part.The corresponding relation of the electric current output block 201 on the button of telepilot 10 and control box panel 202, optionally, S1 correspondence 1, S2 correspondence 2, S3 correspondence 3, by that analogy.
Further, as shown in Figure 3, optionally, current transformer polarity testing system provided by the invention, described first link 401 and described second link 402 of the first p-wire 40 are all clamp, and described 3rd link 403 is plug, concrete, described 3rd link 403 is two-in-one plug, and the insertion of this plug is arranged in the female part on control box panel 202.
Further; as shown in Figure 4; optionally; current transformer polarity testing system provided by the invention; described 4th link 501 and described 5th link 502 of the second p-wire 50 are all plug; concrete, be all banana plug, insert respectively in two current terminals of the corresponding current mutual inductor secondary side on protective device.
Further, optionally, current transformer polarity testing system provided by the invention, described reometer 30 is bidirectional, dc reometer.
Further, as shown in Figure 6, optionally, current transformer polarity testing system provided by the invention, also comprises:
Be arranged on described control box 20 shell rear surface, the permanent magnet 60 adsorbed with device outer surface to be tested.
Further, as shown in Figure 5, optionally, current transformer polarity testing system provided by the invention, described control box 20 also comprises:
Be connected respectively with described relay 204 with described controller 203, characterize the light emitting diode lamp 207 of the closed or off-state of described relay 204.
Further, as shown in Figure 5, optionally, current transformer polarity testing system provided by the invention, described test power supply 205 is direct current 9 volts of dry cells.
Further, optionally, current transformer polarity testing system provided by the invention, to described controller 203 power supply is direct current 12 volts of lithium batteries 208.Further, as shown in Figure 6, outside control box 20 side, charge port 209 and switch 210 is left.
Known via above-mentioned technical scheme, compared with prior art, the invention provides a kind of current transformer whole group of polarity test system.After user carefully connects the wire according to technical scheme provided by the invention, to Current Transformer Secondary side position, sent by telepilot and start detection signal, control box controls the primary side output current that electric current output block is current transformer, now, user only needs the change observing reometer at the secondary side of current transformer, another one people is no longer needed to be passed on the state of Test Switchboard by intercom at the primary side of current transformer, user oneself controls to power or power-off for current transformer primary side by telepilot, therefore user oneself knows that whether current transformer primary side is in power supply very much, combine the observed change to reometer again, just the polarity of current transformer can accurately be judged.Therefore, current transformer provided by the invention whole group of polarity test system, the problem that the error rate can avoiding coordinating measuring current mutual inductor polarity to cause because of many people in prior art is higher, by the technical scheme that one man operation the present invention improves, the accuracy rate of current transformer polarity testing effectively can be improved.
In addition, technical scheme provided by the invention, can realize the test to multiple current transformer, during concrete test, only need disposablely multiple current transformer primary side and control box provided by the invention to be carefully connected the wire, then, user is on different Current Transformer Secondary side joint after reometer, use remote control trigger control box, test can be started, avoid in prior art, during multi-channel test, need the problem repeatedly disconnecting line, effectively improve efficiency.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a current transformer polarity testing system, the primary side of described current transformer is arranged on the position of the switch, and secondary side is arranged on protective device position, it is characterized in that, described system comprises:
Telepilot, the control box be wirelessly connected with described telepilot, and reometer;
Described control box is connected by the first p-wire with the current transformer primary side of the described position of the switch; The first end of described first p-wire comprises the first link and the second link, described first link is connected with one end of the current transformer primary side of the described position of the switch, and described second link is connected with the other end of the current transformer primary side of the described position of the switch; Second end of described first p-wire comprises the 3rd link, and described 3rd link is connected with the electric current output block of described control box, and described electric current output block is arranged on the panel of described control box;
Described reometer is connected by the second p-wire with the Current Transformer Secondary side of described protective device position; The first end of described second p-wire comprises the 4th link and the 5th link, described 4th link is connected with one end of the Current Transformer Secondary side of described protective device position, and described 5th link is connected with the other end of the Current Transformer Secondary side of described protective device position; Second end of described second p-wire is connected with reometer.
2. current transformer according to claim 1 whole group of polarity test system, it is characterized in that, described control box comprises:
Controller, the wireless receiving circuit be connected with described controller, the relay be connected with described electric current output block, and the test power supply be connected with described electric current output block with described relay respectively.
3. current transformer according to claim 2 whole group of polarity test system, it is characterized in that, described control box comprises multiple described electric current output block and multiple described relay, the number of described electric current output block and described relay is equal, a described electric current output block is only connected with a corresponding unique described relay, and a described relay is only connected with a corresponding unique described electric current output block.
4. current transformer according to claim 3 whole group of polarity test system, it is characterized in that, described telepilot comprises:
The button of the different transmission frequency of multiple sign, the number of described button is equal with the number of described electric current output block, and described button is mechanical key or touch controlled key.
5. current transformer according to claim 1 whole group of polarity test system, is characterized in that, described first link and described second link are all clamp.
6. current transformer according to claim 1 whole group of polarity test system, is characterized in that, described 3rd link is plug.
7. current transformer according to claim 1 whole group of polarity test system, is characterized in that, described 4th link and described 5th link are all plug.
8. current transformer according to claim 1 whole group of polarity test system, is characterized in that, described reometer is bidirectional, dc reometer.
9. current transformer according to claim 1 whole group of polarity test system, is characterized in that, also comprise:
Be arranged on described control box shell rear surface, the permanent magnet adsorbed with device outer surface to be tested.
10. current transformer according to claim 1 whole group of polarity test system, it is characterized in that, described control box also comprises:
Be connected respectively with described relay with described controller, characterize the light emitting diode lamp of described relay closes or off-state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510202231.5A CN104849611A (en) | 2015-04-24 | 2015-04-24 | Polarity test system of current transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510202231.5A CN104849611A (en) | 2015-04-24 | 2015-04-24 | Polarity test system of current transformer |
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| CN104849611A true CN104849611A (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510202231.5A Pending CN104849611A (en) | 2015-04-24 | 2015-04-24 | Polarity test system of current transformer |
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Cited By (5)
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| CN108226705A (en) * | 2017-12-29 | 2018-06-29 | 国家电网公司 | A kind of polarity calibration equipment for being remotely controlled three-phase type current transformer |
| CN108594157A (en) * | 2018-06-12 | 2018-09-28 | 国网新疆电力有限公司伊犁供电公司 | Mutual inductor secondary polarity device for fast detecting |
| CN108957381A (en) * | 2018-08-28 | 2018-12-07 | 广东电网有限责任公司 | A kind of instrument for testing polarity of current transformer |
| CN110988776A (en) * | 2019-11-25 | 2020-04-10 | 国网山东省电力公司潍坊供电公司 | Device for detecting polarity of current transformer in small-current grounding line selection device |
| CN114167318A (en) * | 2021-11-09 | 2022-03-11 | 广西电网有限责任公司柳州供电局 | Current transformer wireless polarity judgment device and method capable of supplying power to negative control terminal |
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| CN204142887U (en) * | 2014-07-17 | 2015-02-04 | 国家电网公司 | Wireless remote control type instrument for testing polarity of current transformer |
| CN204903694U (en) * | 2015-04-24 | 2015-12-23 | 国家电网公司 | Current transformer polarity test system |
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| CN201837700U (en) * | 2010-09-19 | 2011-05-18 | 江苏省电力公司仪征市供电公司 | Device for testing polarity of mutual inductor in switch cabinet |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108226705A (en) * | 2017-12-29 | 2018-06-29 | 国家电网公司 | A kind of polarity calibration equipment for being remotely controlled three-phase type current transformer |
| CN108594157A (en) * | 2018-06-12 | 2018-09-28 | 国网新疆电力有限公司伊犁供电公司 | Mutual inductor secondary polarity device for fast detecting |
| CN108957381A (en) * | 2018-08-28 | 2018-12-07 | 广东电网有限责任公司 | A kind of instrument for testing polarity of current transformer |
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| CN110988776A (en) * | 2019-11-25 | 2020-04-10 | 国网山东省电力公司潍坊供电公司 | Device for detecting polarity of current transformer in small-current grounding line selection device |
| CN110988776B (en) * | 2019-11-25 | 2022-07-01 | 国网山东省电力公司潍坊供电公司 | Device for detecting polarity of current transformer in small-current grounding line selection device |
| CN114167318A (en) * | 2021-11-09 | 2022-03-11 | 广西电网有限责任公司柳州供电局 | Current transformer wireless polarity judgment device and method capable of supplying power to negative control terminal |
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