CN107917937A - A kind of low pressure dielectric loss on-line monitoring method of determining device body degree of drying - Google Patents
A kind of low pressure dielectric loss on-line monitoring method of determining device body degree of drying Download PDFInfo
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- CN107917937A CN107917937A CN201711161556.9A CN201711161556A CN107917937A CN 107917937 A CN107917937 A CN 107917937A CN 201711161556 A CN201711161556 A CN 201711161556A CN 107917937 A CN107917937 A CN 107917937A
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- dielectric loss
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- drying
- vacuum drying
- mutual inductor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/221—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance by investigating the dielectric properties
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Abstract
The present invention relates to a kind of low pressure dielectric loss on-line monitoring method of determining device body degree of drying, belong to technical field of mutual inductor manufacture.Technical solution is：During experiment, by mutual inductor device body（1）It is positioned over vacuum drying tank（2）It is interior, vacuum drying tank（2）Wall be equipped with thermocouple terminal plate, by mutual inductor device body（1）Zero screen and end shield vacuum drying tank is connected to by 0.25 silk-covered wires of φ（2）Thermocouple terminal plate on wall, separately drawing two test wires is connected to dielectric loss measuring instrument for thermocouple terminal plate outside（3）, the external standard capacitance of dielectric loss measuring instrument（4）And contact voltage regulator（5）.The positive effect of the present invention：The dielectric loss value of product arbitrary period in the drying process can directly be measured until endpoint, the drying process that can also be applied to novel product determines, instead of original exemplar and disintegrates the method for taking paper measured moisture content.Advantage is no waste of material, work efficiency is high, measurement result is more scientific more accurate more direct.
Description
Technical field
The present invention relates to a kind of low pressure dielectric loss on-line monitoring method of determining device body degree of drying, belong to mutual inductor manufacturing technology
Field.
Background technology
For the mutual inductor of paper oil insulation, in order to meet the requirement of dielectric loss and pressure-resistant performance indicator, in industry usually
The water content in the insulating materials such as cable paper is dropped to 1% ~ 0.5% and less by 6% ~ 10% by way of insulation torrefaction.Absolutely
The technique of edge drying process has a various ways, and the quality of drying effect depends on drying equipment, vacuum equipment, drying time, true
The technological parameters such as reciprocal of duty cycle, therefore different drying means its technological parameter is all different.Technological parameter is established a capital really to carry out
Necessary scientific research exemplar experiment, obtains mass data and confirmed later by a certain amount of batch production.Although dew can be passed through
Point method and steam partial pressure method carry out endpoint, but these are simply as a result, its drying process is not monitored, Wu Fasui
When observe insulation torrefaction degree, it is difficult to accomplish that technological parameter is scientific and reasonable and save energy consumption.Shortcoming is proving period length, workload
Greatly, waste of material is serious.
The content of the invention
The object of the present invention is to provide a kind of low pressure dielectric loss on-line monitoring method of determining device body degree of drying, Real- time monitor
Body drying regime, proving period is short, workload is small, not waste of materials, solves the above problem existing for background technology.
The technical scheme is that：
A kind of low pressure dielectric loss on-line monitoring method of determining device body degree of drying, step are as follows：
During experiment, mutual inductor device body is positioned in vacuum drying tank, the wall of vacuum drying tank is equipped with thermocouple terminal plate, will
Zero screen and end shield of mutual inductor device body are connected to the thermocouple terminal plate on vacuum drying tank skin, thermocouple by 0.25 silk-covered wires of φ
Separately drawing two test wires is connected to dielectric loss measuring instrument, the external standard capacitance of dielectric loss measuring instrument and contact voltage regulator outside terminal board,
Device body dielectric loss value under line monitoring 100V voltages, by dielectric loss value come the degree of drying of determining device body.
0.25 silk-covered wires of φ being connected with zero screen with mutual inductor device and end shield, with being dried in vacuo tank and doing
Dry frame keeps more than 200mm insulation distances.
Zero screen of mutual inductor device body and end shield are connected by the dielectric loss measuring instrument outside signal wire and vacuum drying tank during use
Connect, the arbitrary period in process of vacuum drying can test the dielectric loss value of mutual inductor device body in vacuum drying tank.Due to mutual inductance
Device device is under high vacuum state, therefore its key point is that test voltage is 100V（Mutual inductor finished product Dielectric Loss Test voltage
For more than 10kV）.Whether this method, which can not only dry mutual inductor device body in vacuum drying tank, thoroughly carries out endpoint, also
Drying time, temperature, vacuum, dielectric loss value can be depicted as relation curve, thus drying process be adjusted so as to it is more scientific more
It is economical.
The positive effect of the present invention：The dielectric loss value of product arbitrary period in the drying process can directly be measured until terminal
Judge, the drying process that can also be applied to novel product determines, instead of original exemplar and disintegrates and takes the side of paper measured moisture content
Method.Advantage is no waste of material, work efficiency is high, measurement result is more scientific more accurate more direct.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
In figure：Mutual inductor device body 1, vacuum drying tank 2, dielectric loss measuring instrument 3, standard capacitance 4, contact voltage regulator 5.
Embodiment
The present invention is described further with reference to the accompanying drawings and examples：
During experiment, mutual inductor device body 1 is positioned in vacuum drying tank 2, the wall of vacuum drying tank 2 is equipped with thermocouple terminal
Plate, the thermocouple terminal zero screen of mutual inductor device body 1 and end shield being connected to by 0.25 silk-covered wires of φ on 2 wall of vacuum drying tank
Plate, thermocouple terminal plate outside separately draw two test wires and are connected to dielectric loss measuring instrument, the external standard capacitance 4 of dielectric loss measuring instrument and contact
Pressure regulator 5.
0.25 silk-covered wires of φ being connected with zero screen and end shield on mutual inductor device body 1, with 2 tank body of vacuum drying tank and
Drying frame keeps more than 200mm insulation distances.
Claims (2)
- A kind of 1. low pressure dielectric loss on-line monitoring method of determining device body degree of drying, it is characterised in that following steps：, will be mutual during experiment Sensor device body（1）It is positioned over vacuum drying tank（2）It is interior, vacuum drying tank（2）Wall be equipped with thermocouple terminal plate, by mutual inductor Device body（1）Zero screen and end shield vacuum drying tank is connected to by 0.25 silk-covered wires of φ（2）Thermocouple terminal plate on wall, thermocouple Separately drawing two test wires is connected to dielectric loss measuring instrument outside terminal board（3）, the external standard capacitance of dielectric loss measuring instrument（4）With contact pressure regulation Device（5）, the device body dielectric loss value under 100V voltages is monitored on-line, by dielectric loss value come the degree of drying of determining device body.
- A kind of 2. low pressure dielectric loss on-line monitoring method of determining device body degree of drying according to claim 1, it is characterised in that： Described and mutual inductor device body（1）0.25 silk-covered wires of φ that upper zero screen is connected with end shield, with vacuum drying tank（2）Tank body and drying Frame keeps more than 200mm insulation distances.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711161556.9A CN107917937A (en) | 2017-11-21 | 2017-11-21 | A kind of low pressure dielectric loss on-line monitoring method of determining device body degree of drying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711161556.9A CN107917937A (en) | 2017-11-21 | 2017-11-21 | A kind of low pressure dielectric loss on-line monitoring method of determining device body degree of drying |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107917937A true CN107917937A (en) | 2018-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711161556.9A Withdrawn CN107917937A (en) | 2017-11-21 | 2017-11-21 | A kind of low pressure dielectric loss on-line monitoring method of determining device body degree of drying |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530921A (en) * | 2019-09-09 | 2019-12-03 | 江苏省原子医学研究所 | A kind of judgment method of external hanging type vacuum freeze drying degree |
| CN113281378A (en) * | 2021-05-25 | 2021-08-20 | 华中科技大学 | Decoupling research device for end heat transfer of metallized film capacitor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101315399A (en) * | 2008-06-23 | 2008-12-03 | 南京电气（集团）有限责任公司 | Dielectric loss performance monitoring method in drying process course of capacitor type heavy insulation product |
| CN101446467A (en) * | 2008-12-25 | 2009-06-03 | 宁波华通电器集团股份有限公司 | Multifunctional sealing heat insulation box for producing high voltage oil immersion transformer |
| CN102074346A (en) * | 2010-12-06 | 2011-05-25 | 保定天威集团有限公司 | Drying process of high-voltage current transformer body |
| CN202938847U (en) * | 2012-11-07 | 2013-05-15 | 中国西电电气股份有限公司 | Oiled paper capacitive sleeve capacitor core vacuum drying endpoint monitoring system |
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2017
- 2017-11-21 CN CN201711161556.9A patent/CN107917937A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101315399A (en) * | 2008-06-23 | 2008-12-03 | 南京电气（集团）有限责任公司 | Dielectric loss performance monitoring method in drying process course of capacitor type heavy insulation product |
| CN101446467A (en) * | 2008-12-25 | 2009-06-03 | 宁波华通电器集团股份有限公司 | Multifunctional sealing heat insulation box for producing high voltage oil immersion transformer |
| CN102074346A (en) * | 2010-12-06 | 2011-05-25 | 保定天威集团有限公司 | Drying process of high-voltage current transformer body |
| CN202938847U (en) * | 2012-11-07 | 2013-05-15 | 中国西电电气股份有限公司 | Oiled paper capacitive sleeve capacitor core vacuum drying endpoint monitoring system |
Non-Patent Citations (2)
| Title |
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| 冀中电力: "《www.ibaobei8.com/xiangguan/xg32.html》", 4 February 2012 * |
| 陈释 等: ""电压对介损测试仪测试数据的影响探讨"", 《四川水力发电》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530921A (en) * | 2019-09-09 | 2019-12-03 | 江苏省原子医学研究所 | A kind of judgment method of external hanging type vacuum freeze drying degree |
| CN110530921B (en) * | 2019-09-09 | 2021-06-18 | 江苏省原子医学研究所 | Method for judging degree of external vacuum freeze drying |
| CN113281378A (en) * | 2021-05-25 | 2021-08-20 | 华中科技大学 | Decoupling research device for end heat transfer of metallized film capacitor |
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Application publication date: 20180417 |