CN106569085A - Current transformer secondary circuit cable checking method - Google Patents
Current transformer secondary circuit cable checking method Download PDFInfo
- Publication number
- CN106569085A CN106569085A CN201610922683.5A CN201610922683A CN106569085A CN 106569085 A CN106569085 A CN 106569085A CN 201610922683 A CN201610922683 A CN 201610922683A CN 106569085 A CN106569085 A CN 106569085A
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- China
- Prior art keywords
- terminal
- resistance value
- tap
- current transformer
- secondary winding
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
Abstract
The invention provides a current transformer secondary circuit cable checking method. The method comprises the steps that (1) the resistance value between each tap of the secondary winding of a current transformer and each terminal of a next-level terminal strip is tested; and (2) whether each tested resistance value is consistent with a corresponding actual resistance value is judged. According to the step (2), if a tested resistance value is consistent with the corresponding actual resistance value, the wiring of a tested terminal is correct; and if a tested resistance value is not consistent with the corresponding actual resistance value and the inconsistent resistance value is infinite, the connection between a tested tap and a tested terminal is open. According to the invention, whether each terminal is connected with the corresponding tap of the secondary winding is judged without disengaging a line between the tap of the secondary winding and the terminal of the next-level terminal strip, and at the same time whether disconnection exists in the secondary winding of the current transformer is checked.
Description
Technical field：
The present invention relates to electrical equipment debugging field, and in particular to secondary loop of mutual inductor school line method.
Background technology：
As shown in figure 1, needing secondary winding in current transformer in the line process of secondary loop of mutual inductor school at present
Each tap of 1 root connects terminal and takes apart successively with corresponding next stage terminal block 2, the line taken apart that then will connect on terminal
One end and grounded screen short circuit, as conducting shelves, the one-level grounded screen of digital multimeter 3, another pole is connected to terminal to digital multimeter 3
The other end of the line taken apart being located, observes the buzzer of digital multimeter 3 whether sounding, if buzzer sounding, proves
Connection terminal does not have open circuit conditions with the wiring of tap, if the non-sounding of buzzer, proves the wiring of connection terminal and tap
There are open circuit conditions.In above-mentioned school line process, need each tap by the root of secondary winding in current transformer 1 next with corresponding
Level terminal block 2 connects terminal and takes apart, unpack procedure trouble, while recovering during tap and corresponding terminal, easily occurs recovering
Problem-Error.
The content of the invention：
It is an object of the invention to provide secondary loop of mutual inductor school line method, without the need for taking Current Transformer Secondary apart
The all taps of winding root connect the line between terminal with corresponding next stage terminal block, direct measurement Current Transformer Secondary around
The arbitrary tap of group root respectively with the resistance between next stage terminal block each terminal, can determine whether secondary winding in current transformer root
Portion's tap connects whether terminal is corresponding with next stage terminal block, while the situation that broken string is whether there is inside Secondary Winding can be verified.
The present invention is realized using following proposal：Secondary loop of mutual inductor school line method, mainly includes the following steps that：
(1) electricity tested respectively between the arbitrary tap of secondary winding in current transformer and each terminal of next stage terminal block
Resistance；
(2) judge whether each described resistance value that test is obtained is consistent with corresponding actual resistance；When testing
When the resistance value for arriving is consistent with the corresponding actual resistance, then the terminal connections are test for correct；Work as survey
When the resistance value that obtains of examination is inconsistent with the corresponding actual resistance, if the inconsistent resistance value is infinite
Greatly, then it is test for the tap and the line that is test between the terminal has open circuit；After repairing open circuit, then retest
The resistance value between the tap and the corresponding terminal, if the resistance value and the corresponding actual resistance
It is still inconsistent, and be not infinity, then the connector wiring fault is test for, the terminal of wiring error is removed, by institute
State terminal to reconnect in the tap of correct secondary winding in current transformer.
Alternatively, in the step (2), when the resistance value that obtains of test with the corresponding actual resistance not
When consistent, if the inconsistent resistance value is not infinity, the connector wiring fault is test for, removes wiring error
The terminal, the terminal is reconnected in the tap of correct secondary winding in current transformer；
Alternatively, in the step (1), the arbitrary tap of secondary winding in current transformer and next stage terminal block are tested respectively
Each terminal between resistance value, specifically include following steps：
A () arranges digital multimeter to resistance grade；
B () measures the arbitrary tap of the secondary winding in current transformer and next stage terminal with the digital multimeter
Resistance value between each described terminal of row.
Alternatively, in the step (b), described taken out with the digital multimeter measurement current transform er Secondary Winding is arbitrary
Resistance value between head and each described terminal of next stage terminal block, specially：By the secondary winding in current transformer
Any one of tap ground connection, an and pole of the digital multimeter is grounded, another pole successively with the current transformer
Each described terminal connection of next stage terminal block, the resistance value tested successively between the tap and the terminal.
Advantages of the present invention：The secondary loop of mutual inductor school line method that the present invention is provided need not be by Secondary Winding
Line between the terminal of tap and next stage terminal block is taken apart, therefore can avoid original secondary loop of mutual inductor school line method
In cumbersome process of taking out stitches, while avoiding when restoring current transformer is taken out stitches because the recovery mistake that careless general idea is caused is asked
Topic, shortens the time of whole secondary loop of mutual inductor school line process；Only need to measurement current transform er successively it is secondary around
Resistance value between the arbitrary tap of group and each terminal of next stage terminal block, you can judge whether each terminal is connected to secondary
In the corresponding tap of winding, and the situation that broken string is whether there is inside secondary winding in current transformer can be verified out at the same time.
Description of the drawings：
Fig. 1 is the wiring diagram of secondary loop of mutual inductor school line method in prior art；
Fig. 2 is the wiring diagram of secondary loop of mutual inductor school line method in the embodiment of the present invention.
Description of the drawings is as follows：1st, secondary winding in current transformer；2nd, next stage terminal block；3rd, digital multimeter；S1, first
Tap；S2, the second tap；S3, the 3rd tap；S4, the 4th tap；TA1, the first terminal；TA2, Second terminal；TA3, the 3rd end
Son；TA4, forth terminal.
Specific embodiment：
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
In an embodiment of the present invention, there is provided secondary loop of mutual inductor school line method, it includes：
(1) test respectively between the arbitrary tap of secondary winding in current transformer 1 and each terminal of next stage terminal block 2
Resistance value；
A digital multimeter 3 is arranged resistance grade by ()；
B () is every with next stage terminal block 2 with digital multimeter 3 measurement current transform er Secondary Winding, 1 first tap S1
Resistance value between individual terminal：First tap S1 of secondary winding in current transformer 1 is grounded, and by the one of digital multimeter 3
Pole is grounded, and another pole be connected successively with each terminal of next stage terminal block 2, test successively the first tap S1 and each terminal it
Between resistance value.
(2) judge whether each resistance value that test is obtained is consistent with corresponding actual resistance；When test is obtained
When resistance value is consistent with corresponding actual resistance, then terminal connections are test for correct；When the resistance value that obtains of test with
When corresponding actual resistance is inconsistent, if inconsistent resistance value for infinity, the first tap S1 be test for end
Line between son has open circuit；After repairing open circuit, then the resistance value between the first tap S1 and corresponding terminal is retested, if
Resistance value is still inconsistent with corresponding actual resistance, and is not infinity, then be test for connector wiring fault, and dismounting connects
The terminal of line mistake, terminal is reconnected in the correct tap of secondary winding in current transformer 1.
In the above embodiment of the present invention, when the resistance value that obtains of test it is inconsistent with corresponding actual resistance
When, and inconsistent resistance value is not infinity, then be test for connector wiring fault, the terminal of wiring error is removed, by end
Son is reconnected in the correct tap of the correspondence of secondary winding in current transformer 1.
As shown in Fig. 2 in the specific embodiment of the invention, secondary winding in current transformer includes four taps, respectively
First tap S1, the second tap S2, the 3rd tap S3, the 4th tap S4, the terminal of corresponding next stage terminal block is also 4,
Respectively the first terminal TA1, Second terminal TA2, third terminal TA3, forth terminal TA4, and the first tap S1 and the first terminal
Actual resistance between TA1, Second terminal TA2, third terminal TA3 and forth terminal TA4 be respectively 0 ohm, 10 ohm, 20
Ohm and 30 ohm, and in a particular embodiment of the present invention, successively measurement current transform er Secondary Winding the first tap S1 with
Digital multimeter 4 is arranged resistance grade by the resistance value between each terminal of next stage terminal block, concretely comprising the following steps for measurement,
First tap S1 of secondary winding in current transformer is grounded, one end of digital multimeter 4 is grounded, the other end successively with electric current
The first terminal TA1 of transformer next stage terminal block, Second terminal TA2, third terminal TA3 and forth terminal TA4 are sequentially connected,
Be successively read the resistance value of the display of digital multimeter 4, the resistance value for measuring is respectively a, b, c, d, a that judges to measure successively, b,
Whether c, d are consistent with actual resistance, if unanimously, illustrate that wiring is correct, if inconsistent, judge whether is the resistance value that measures
For infinity, illustrate if the resistance value for measuring is for infinity between the first tap S1 terminals corresponding with the wrong resistance value
Circuit have open circuit；If the resistance value for measuring is not infinitely great, it is assumed that measure a=10 ohms, then prove that the first terminal TA1 connects
To on the second tap S2, it is assumed that measure a=20 ohms, then prove that the first terminal TA1 has been connected on the 3rd tap S3, it is assumed that survey
A=30 ohms are obtained, then proves that the first terminal TA1 has been connected on the 4th tap S4；Hypothesis measures b=0 ohms, then prove the second end
Sub- TA2 has been connected on the first tap S1, it is assumed that b=20 ohms, then prove that Second terminal TA2 has been connected on the 3rd tap S3, false
If b=30 ohms, then prove that Second terminal TA2 has been connected on the 4th tap S4；Hypothesis measures c=0 ohms, then prove the 3rd end
Sub- TA3 has been connected on the first tap S1, it is assumed that c=10 ohms, then prove that third terminal TA3 has been connected on the second tap S2, false
If c=30 ohms, then prove that third terminal TA3 has been connected on the 4th tap S4；Hypothesis measures d=0 ohms, then prove the 4th end
Sub- TA4 has been connected on the first tap S1, it is assumed that measure d=10 ohms, then prove that forth terminal TA4 has been connected to the second tap S2
On, it is assumed that d=20 ohms are measured, then proves that forth terminal TA4 has been connected on the 3rd tap S3.
It is more than the preferred embodiment of the present invention, it is noted that for those skilled in the art,
Under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should be regarded as this
The protection domain of invention.
Claims (4)
1. secondary loop of mutual inductor school line method, it is characterised in that it includes：
(1) resistance tested respectively between arbitrary tap of secondary winding in current transformer and each terminal of next stage terminal block
Value；
(2) judge whether each described resistance value that test is obtained is consistent with corresponding actual resistance；When test is obtained
When the resistance value is consistent with the corresponding actual resistance, then the terminal connections are test for correct；When testing
When the resistance value for arriving is inconsistent with the corresponding actual resistance, and the inconsistent resistance value is infinity,
The line for being then test for the tap and being test between the terminal has open circuit；After repairing open circuit, then retest institute
The resistance value between tap and the corresponding terminal is stated, if the resistance value is with the corresponding actual resistance still
It is inconsistent, and be not infinity, then the connector wiring fault is test for, the terminal of wiring error is removed, will be described
Terminal is reconnected in the correct tap of the secondary winding in current transformer correspondence.
2. secondary loop of mutual inductor school according to claim 1 line method, it is characterised in that in the step (2),
When the resistance value that test is obtained is inconsistent with the corresponding actual resistance, and the inconsistent resistance value is not
For infinity, then the connector wiring fault is test for, removes the terminal of wiring error, the terminal is reconnected
To in the correct tap of secondary winding in current transformer correspondence.
3. secondary loop of mutual inductor school according to claim 1 line method, it is characterised in that in the step (1),
The resistance value tested respectively between the arbitrary tap of secondary winding in current transformer and each terminal of next stage terminal block, concrete bag
Include following steps：
A () arranges digital multimeter to resistance grade；
B () measures the arbitrary tap of the secondary winding in current transformer and next stage terminal block with the digital multimeter
Resistance value between each described terminal.
4. secondary loop of mutual inductor school according to claim 3 line method, it is characterised in that in the step (b),
With the arbitrary tap of the digital multimeter measurement current transform er Secondary Winding and each described end of next stage terminal block
Resistance value between son, specially：Any one of tap of the secondary winding in current transformer is grounded, and will be described
The one pole ground connection of digital multimeter, another pole is connected successively with each described terminal of the next stage terminal block, tests successively
The resistance value between the tap and the terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610922683.5A CN106569085A (en) | 2016-10-27 | 2016-10-27 | Current transformer secondary circuit cable checking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610922683.5A CN106569085A (en) | 2016-10-27 | 2016-10-27 | Current transformer secondary circuit cable checking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106569085A true CN106569085A (en) | 2017-04-19 |
Family
ID=58533366
Family Applications (1)
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|---|---|---|---|
| CN201610922683.5A Pending CN106569085A (en) | 2016-10-27 | 2016-10-27 | Current transformer secondary circuit cable checking method |
Country Status (1)
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| CN (1) | CN106569085A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107462748A (en) * | 2017-08-21 | 2017-12-12 | 山东钢铁股份有限公司 | The mode of connection of secondary winding in current transformer |
| CN108710098A (en) * | 2018-05-18 | 2018-10-26 | 深圳供电局有限公司 | A kind of secondary loop of mutual inductor load detection method |
| CN110632448A (en) * | 2019-09-16 | 2019-12-31 | 深圳供电局有限公司 | Wiring detection method for three-phase three-wire metering device with mutual inductor |
| CN113030834A (en) * | 2021-04-19 | 2021-06-25 | 北京送变电有限公司 | Transformer secondary circuit line calibration device and method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63149577A (en) * | 1986-12-12 | 1988-06-22 | Fuji Electric Co Ltd | Detection circuit of pt for secondary voltage disappearance |
| JP2009300250A (en) * | 2008-06-13 | 2009-12-24 | Sanyo Special Steel Co Ltd | Method of inspecting excitation winding |
| CN101713809A (en) * | 2009-12-10 | 2010-05-26 | 贵州电力试验研究院 | Checking method of CT secondary wire in switch cabinet |
| CN202486254U (en) * | 2012-03-14 | 2012-10-10 | 山西省电力公司电力科学研究院 | Secondary circuit detection system of current mutual inductor |
| CN103018702A (en) * | 2012-12-03 | 2013-04-03 | 中国十七冶集团有限公司 | Fast checking method of high-voltage cabinet current transformer secondary loop line |
| CN203037783U (en) * | 2012-11-27 | 2013-07-03 | 山西省电力公司电力科学研究院 | On-off detection apparatus for secondary cable core of current transformer |
| CN104865494A (en) * | 2015-05-06 | 2015-08-26 | 国家电网公司 | Portable current transformer polarity testing device and use method thereof |
| CN105182164A (en) * | 2015-09-23 | 2015-12-23 | 广东电网有限责任公司佛山供电局 | Electric energy metering secondary loop wiring verification method |
| CN205427092U (en) * | 2016-01-26 | 2016-08-03 | 国网山东省电力公司青岛供电公司 | Wiring detector |
-
2016
- 2016-10-27 CN CN201610922683.5A patent/CN106569085A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63149577A (en) * | 1986-12-12 | 1988-06-22 | Fuji Electric Co Ltd | Detection circuit of pt for secondary voltage disappearance |
| JP2009300250A (en) * | 2008-06-13 | 2009-12-24 | Sanyo Special Steel Co Ltd | Method of inspecting excitation winding |
| CN101713809A (en) * | 2009-12-10 | 2010-05-26 | 贵州电力试验研究院 | Checking method of CT secondary wire in switch cabinet |
| CN202486254U (en) * | 2012-03-14 | 2012-10-10 | 山西省电力公司电力科学研究院 | Secondary circuit detection system of current mutual inductor |
| CN203037783U (en) * | 2012-11-27 | 2013-07-03 | 山西省电力公司电力科学研究院 | On-off detection apparatus for secondary cable core of current transformer |
| CN103018702A (en) * | 2012-12-03 | 2013-04-03 | 中国十七冶集团有限公司 | Fast checking method of high-voltage cabinet current transformer secondary loop line |
| CN104865494A (en) * | 2015-05-06 | 2015-08-26 | 国家电网公司 | Portable current transformer polarity testing device and use method thereof |
| CN105182164A (en) * | 2015-09-23 | 2015-12-23 | 广东电网有限责任公司佛山供电局 | Electric energy metering secondary loop wiring verification method |
| CN205427092U (en) * | 2016-01-26 | 2016-08-03 | 国网山东省电力公司青岛供电公司 | Wiring detector |
Non-Patent Citations (1)
| Title |
|---|
| 王松等: "电流互感器二次回路端子松动故障分析", 《华电技术》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107462748A (en) * | 2017-08-21 | 2017-12-12 | 山东钢铁股份有限公司 | The mode of connection of secondary winding in current transformer |
| CN108710098A (en) * | 2018-05-18 | 2018-10-26 | 深圳供电局有限公司 | A kind of secondary loop of mutual inductor load detection method |
| CN108710098B (en) * | 2018-05-18 | 2021-02-19 | 深圳供电局有限公司 | Current transformer secondary circuit load detection method |
| CN110632448A (en) * | 2019-09-16 | 2019-12-31 | 深圳供电局有限公司 | Wiring detection method for three-phase three-wire metering device with mutual inductor |
| CN110632448B (en) * | 2019-09-16 | 2022-07-15 | 深圳供电局有限公司 | Wiring detection method for three-phase three-wire metering device with mutual inductor |
| CN113030834A (en) * | 2021-04-19 | 2021-06-25 | 北京送变电有限公司 | Transformer secondary circuit line calibration device and method |
| CN113030834B (en) * | 2021-04-19 | 2023-01-10 | 北京送变电有限公司 | Transformer secondary circuit line calibration device and method |
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Application publication date: 20170419 |
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