CN110850254A - Dry-to-single-coil detection device - Google Patents
Dry-to-single-coil detection device Download PDFInfo
- Publication number
- CN110850254A CN110850254A CN201911293685.2A CN201911293685A CN110850254A CN 110850254 A CN110850254 A CN 110850254A CN 201911293685 A CN201911293685 A CN 201911293685A CN 110850254 A CN110850254 A CN 110850254A
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- China
- Prior art keywords
- iron core
- partial discharge
- main body
- core main
- test device
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/20—Measuring number of turns; Measuring transformation ratio or coupling factor of windings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a dry-to-single coil detection device, which comprises an iron core main body, wherein the iron core main body is an open iron core, iron core movable arms connected with two ends of the open end are arranged on the iron core main body, a standard coil and a tested coil which are electrically connected with a power supply are respectively arranged at two ends of the open end of the iron core main body, the tested coil realizes an induction withstand voltage test through the opening of a duplex switch, and is connected to a transformation ratio test device or a partial discharge test device in a closed state through the duplex switch, wherein the partial discharge test device comprises a capacitor, an input impedance and a partial discharge instrument which are connected in series, an S2 grounding wire of the duplex switch is used for carrying out a partial discharge test, an S1 is connected to the partial discharge test device, the transformation ratio test device comprises a voltmeter, and S1 and S2 are respectively connected to two ends of. The invention has simple structure and reasonable design, can detect the wound coils, is convenient for classifying the coils according to quality grades so as to be applied to transformers with different requirements, saves the manufacturing cost and greatly saves the testing cost.
Description
Technical Field
The invention relates to coil detection, in particular to a dry-to-single coil detection device.
Background
At present, the production detection process of the dry transformer is that after the assembly is completed, the partial discharge, the induction voltage resistance, the number of turns and other performances of the dry transformer can be detected. And the unqualified detection also needs dismantling treatment.
Disclosure of Invention
In order to solve the problems, the invention provides a dry-type transformer single coil detection device which can directly detect a wound single coil in the production process of a dry-type transformer before assembly and can detect partial discharge, induction withstand voltage and the number of turns of the coil.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the invention relates to a dry-to-single coil detection device, which comprises an iron core main body, wherein the iron core main body is an open iron core, iron core movable arms connected with two ends of the open end are arranged on the iron core main body, a standard coil and a tested coil which are electrically connected with a power supply are respectively arranged at two ends of the open end of the iron core main body, the tested coil realizes an induction withstand voltage test through the opening of a duplex switch, a transformation ratio test device or a partial discharge test device is connected to the closed state of the duplex switch to realize a transformation ratio test or a partial discharge test, the partial discharge test device comprises a capacitor, an input impedance and a partial discharge instrument which are connected in series, an S2 switch grounding wire of the duplex switch is connected during the partial discharge test, an S1 switch is connected to the partial discharge test device, the transformation ratio test device comprises a voltmeter, and an S1 switch and an S2 switch are respectively connected to two.
The invention is further improved in that: one end of the iron core movable arm is rotatably fixed at one end of the opening of the iron core main body through a movable pin, and the other end of the iron core movable arm is connected with the other end of the opening of the iron core main body through a positioning pin.
The invention is further improved in that: the power supply is a single-phase partial discharge-free variable frequency power supply.
The invention has the beneficial effects that: the invention sets a dual switch to realize accessing two different testing devices to carry out transformation ratio testing and partial discharge testing, when closing 2 of S1 and 4 of S2, the power supply sets voltage 100V, the turn ratio is tested by a voltmeter method, whether the number of turns of a tested coil meets the requirement can be detected, when closing 1 of S1 and 4 of S2, the power supply boosts voltage 414V, and after 30 seconds, the voltage is reduced to 300V, and then partial discharge testing can be carried out, when detecting the tested coil, the movable end of an iron core movable arm is connected with an iron core main body through a positioning pin, when S1 and S2 are both in an off state, the power supply is raised to 460V, and induction voltage-withstand testing is carried out by setting different frequencies and time. By using the invention, the technical performance parameters such as partial discharge, induction withstand voltage, turn number and the like can be detected after the coil is wound, the coil can be classified according to the performance parameters, and the coil can be applied to products with different requirements, thereby saving the cost.
The invention has simple structure and reasonable design, can detect the wound coils, is convenient for classifying the coils according to quality grades so as to be applied to transformers with different requirements, saves the manufacturing cost and greatly saves the testing cost. Drawings
FIG. 1 is a schematic circuit diagram of a testing apparatus with three testing functions according to the present invention.
Fig. 2 is a schematic diagram of a test device including a partial discharge.
Wherein: 1-iron core main body, 2-iron core movable arm, 3-standard coil, 4-tested coil, 5-movable pin, 6-positioning pin and 7-partial discharge testing device.
Detailed Description
For the purpose of enhancing understanding of the present invention, the present invention will be described in detail with reference to the following examples and drawings, which are provided for the purpose of illustration only and do not limit the scope of the present invention.
As shown in fig. 1-2, the invention relates to a dry-to-single coil detection device, which comprises an iron core body 1, wherein the iron core body 1 is an open iron core, an iron core movable arm 2 connected with two ends of an opening is arranged on an iron core main body 1, a standard coil 3 and a tested coil 4 which are electrically connected with a power supply are respectively arranged at two ends of the opening of the iron core main body 1, the tested coil 4 realizes an induction withstand voltage test by opening a duplex switch S1 and a duplex switch S2, the transformation ratio test device or the partial discharge test device 7 is accessed through the closed state of the dual switch to realize the transformation ratio test or the partial discharge test, the partial discharge testing device 7 comprises a capacitor, an input impedance and a partial discharge instrument which are connected in series, an S2 switch ground wire is connected when the partial discharge test is carried out, an S1 switch is connected with the partial discharge testing device 7, the transformation ratio testing device comprises a voltmeter, and an S1 switch and an S2 switch are respectively connected to two ends of the voltmeter when the transformation ratio test is carried out.
One end of the iron core movable arm 2 is rotatably fixed at one end of the opening of the iron core main body 1 through a movable pin 5, and the other end of the iron core movable arm 2 is connected with the other end of the opening of the iron core main body 1 through a positioning pin 6. The power supply is a single-phase partial discharge-free variable frequency power supply. Open iron core digging arm 2 and be convenient for the installation and take off by test coil 4, when detecting by test coil 4, rotate iron core digging arm 2, the expansion end of iron core digging arm 2 passes through locating pin 6 and is connected with the iron core main part, and S1 and S2 are in the disconnection, rise single-phase no partial discharge variable frequency power supply to 460V this moment, set up different frequency and time and carry out the withstand voltage test of response. And (3) closing 2 of S1 and 3 of S2, setting the voltage of the single-phase partial discharge-free variable frequency power supply to be 100V, and testing the turn ratio by a voltmeter method to detect whether the 4 turns of the tested coil meet the requirement. And when 1 of S1 and 4 of S2 are closed, the single-phase non-partial discharge variable frequency power supply boosts the voltage to 414V, and the voltage is reduced to 300V after 30 seconds, so that the partial discharge test can be carried out.
The invention has simple structure and reasonable design, can detect the wound coils, is convenient for classifying the coils according to quality grades so as to be applied to transformers with different requirements, saves the manufacturing cost and greatly saves the testing cost.
Claims (3)
1. Do and become single coil detection device, including iron core main part (1), its characterized in that: the iron core main body (1) is an open iron core, iron core movable arms (2) connected with two ends of the opening are arranged on the iron core main body (1), a standard coil (3) and a coil to be tested (4) which are electrically connected with a power supply are respectively arranged at two ends of an opening of the iron core main body (1), the tested coil (4) realizes the induction voltage-withstanding test by opening the double-link switches S1 and S2, the transformation ratio test device or the partial discharge test device (7) is accessed to realize the transformation ratio test or the partial discharge test through the closed state of the dual switch, wherein the partial discharge test device (7) comprises a capacitor, an input impedance and a partial discharge instrument which are connected in series, when the partial discharge test is carried out, the S2 switch grounding wire and the S1 switch are connected with a partial discharge test device (7), the transformation ratio test device comprises a voltmeter, an S1 switch and an S2 switch are respectively connected to two ends of the voltmeter when the transformation ratio test is carried out.
2. The dry-to-single coil detection device of claim 1, wherein: one end of the iron core movable arm (2) is rotatably fixed at one end of the opening of the iron core main body (1) through a movable pin (5), and the other end of the iron core movable arm (2) is connected with the other end of the opening of the iron core main body (1) through a positioning pin (6).
3. The dry-to-single coil detection device of claim 1, wherein: the power supply is a single-phase partial discharge-free variable frequency power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911293685.2A CN110850254A (en) | 2019-12-16 | 2019-12-16 | Dry-to-single-coil detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911293685.2A CN110850254A (en) | 2019-12-16 | 2019-12-16 | Dry-to-single-coil detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110850254A true CN110850254A (en) | 2020-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911293685.2A Withdrawn CN110850254A (en) | 2019-12-16 | 2019-12-16 | Dry-to-single-coil detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110850254A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115184837A (en) * | 2022-07-20 | 2022-10-14 | 云南电网有限责任公司电力科学研究院 | Equivalent test device and method for transformer coil |
-
2019
- 2019-12-16 CN CN201911293685.2A patent/CN110850254A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115184837A (en) * | 2022-07-20 | 2022-10-14 | 云南电网有限责任公司电力科学研究院 | Equivalent test device and method for transformer coil |
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Application publication date: 20200228 |