CN105004950A - Detection method of low-frequency transformer - Google Patents
Detection method of low-frequency transformer Download PDFInfo
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- CN105004950A CN105004950A CN201510397430.6A CN201510397430A CN105004950A CN 105004950 A CN105004950 A CN 105004950A CN 201510397430 A CN201510397430 A CN 201510397430A CN 105004950 A CN105004950 A CN 105004950A
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Abstract
The invention discloses a detection method of a low-frequency transformer. The method comprises the steps of: (1) using a digital universal meter to detect the low-frequency transformer, and ensuring that a primary zero load current is no more than 55 mA and a secondary zero load voltage and a secondary load voltage are respectively at a rated load; (2) detecting the voltage adjusting rate of the low-frequency transformer, and ensuring that voltage adjusting rate<=(zero load voltage - load voltage)/ zero load voltage * unit 100%; (3) using a withstand voltage tester to test the low-frequency transformer, and ensuring that the transformer primary coil and iron core (skeleton), and the primary coil and secondary coil are respectively no less than 4000VAC/60S/leakage current 3 mA and have no-breakdown and no arcing, and the secondary coil and iron core (skeleton) are respectively no less than 1200VAC/60S/leakage current 3 mA and have no-breakdown and no arcing, and the ring transformer primary coil and secondary coil are respectively no less than 4000VAC/60S/leakage current 3 mA and have no-breakdown and no arcing; (4) placing the low-frequency transformer under the condition of normal temperature and relative humidity 80-100%, taking the low-frequency transformer out, and detecting an insulating resistance to be no less than 10 M[Omega]. The detection method of the low-frequency transformer has the advantages that daily testing can be carried out rapidly, and the working performance of the low-frequency transformer can be monitored.
Description
Technical field
The present invention relates to a kind of detection method, especially the detection method of low-frequency transformer.
Background technology
Transformer (Transformer) utilizes the principle of electromagnetic induction to change the device of alternating voltage, and main member is primary coil, secondary coil and iron core (magnetic core).Major function has: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilizing (magnetic saturation transformer) etc.Can be divided into by purposes: power transformer and special transformer (electric furnace change, rectification change, power frequency testing transformer, pressure regulator, mining change, audio-frequency transformer (AFT), I.F.T., high-frequency transformer, impact transformer, instrument transformer, electronic transformer, reactor, mutual inductor etc.).Circuit symbol commonly uses the beginning that T is used as numbering. example: T01, T201 etc.
The application of transformer is very extensive, is therefore the main points in transformer serviceable life for the performance test of transformer.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of detection method of low-frequency transformer, can carry out daily test fast, monitor its serviceability.
The present invention is achieved through the following technical solutions.
A detection method for low-frequency transformer, comprising:
(1) use digital multimeter to detect low-frequency transformer, guarantee elementary no-load current≤55mA, secondary no-load voltage and secondary load voltage are at nominal load;
(2) detect the voltage regulation factor of low-frequency transformer, guarantee voltage regulation factor≤(no-load voltage-load voltage)/no-load voltage * unit 100%;
(3) use Hi-pot Tester low-frequency transformer is tested, guarantee low-frequency transformer elementary with iron core (skeleton), elementary and secondary >=4000VAC/60S/ leakage current 3mA without puncturing also without arcing; Secondary with iron core (skeleton) >=1200VAC/60S/ leakage current 3mA without puncturing also without arcing; Toroidal transformer is elementary and secondary >=and 4000VAC/60S/ leakage current 3mA is without puncturing also without arcing;
(4) by low-frequency transformer at normal temperature, place 36-48 hour under relative humidity 80 ~ 100% condition, take out after detect insulation resistance be not less than 10M Ω.
Beneficial effect of the present invention:
The detection of transformer under daily state can be tackled safeguard, monitor its serviceability, guarantee that its serviceable life is in general category; And this method is comparatively easy, can be familiar with grasping by those of ordinary skill, effect is better.
Embodiment
According to embodiment, the present invention is described in further detail below.
The present invention, the detection method of low-frequency transformer, comprising:
(1) use digital multimeter to detect low-frequency transformer, guarantee elementary no-load current≤55mA, secondary no-load voltage and secondary load voltage are at nominal load;
(2) detect the voltage regulation factor of low-frequency transformer, guarantee voltage regulation factor≤(no-load voltage-load voltage)/no-load voltage * unit 100%;
(3) use Hi-pot Tester low-frequency transformer is tested, guarantee low-frequency transformer elementary with iron core (skeleton), elementary and secondary >=4000VAC/60S/ leakage current 3mA without puncturing also without arcing; Secondary with iron core (skeleton) >=1200VAC/60S/ leakage current 3mA without puncturing also without arcing; Toroidal transformer is elementary and secondary >=and 4000VAC/60S/ leakage current 3mA is without puncturing also without arcing;
(4) by low-frequency transformer at normal temperature, place 36-48 hour under relative humidity 80 ~ 100% condition, take out after detect insulation resistance be not less than 10M Ω.
The present invention, the detection method of low-frequency transformer, can tackle the detection of transformer under daily state and safeguard, monitor its serviceability, guarantee that its serviceable life is in general category; And this method is comparatively easy, can be familiar with grasping by those of ordinary skill, effect is better.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to allow the personage being familiar with this art can understand content of the present invention and be implemented, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (1)
1. a detection method for low-frequency transformer, is characterized in that, comprising:
(1) use digital multimeter to detect low-frequency transformer, guarantee elementary no-load current≤55mA, secondary no-load voltage and secondary load voltage are at nominal load;
(2) detect the voltage regulation factor of low-frequency transformer, guarantee voltage regulation factor≤(no-load voltage-load voltage)/no-load voltage * unit 100%;
(3) use Hi-pot Tester low-frequency transformer is tested, guarantee low-frequency transformer elementary with iron core (skeleton), elementary and secondary >=4000VAC/60S/ leakage current 3mA without puncturing also without arcing; Secondary with iron core (skeleton) >=1200VAC/60S/ leakage current 3mA without puncturing also without arcing; Toroidal transformer is elementary and secondary >=and 4000VAC/60S/ leakage current 3mA is without puncturing also without arcing;
(4) by low-frequency transformer at normal temperature, place 36-48 hour under relative humidity 80 ~ 100% condition, take out after detect insulation resistance be not less than 10M Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510397430.6A CN105004950A (en) | 2015-07-03 | 2015-07-03 | Detection method of low-frequency transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510397430.6A CN105004950A (en) | 2015-07-03 | 2015-07-03 | Detection method of low-frequency transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105004950A true CN105004950A (en) | 2015-10-28 |
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| CN201510397430.6A Pending CN105004950A (en) | 2015-07-03 | 2015-07-03 | Detection method of low-frequency transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108508313A (en) * | 2017-02-26 | 2018-09-07 | 武汉市欧睿科技有限公司 | A kind of detection method of power transformer |
| CN109901037A (en) * | 2019-04-04 | 2019-06-18 | 中国科学院电工研究所 | High frequency transformer factory insulation test voltage measuring method based on the insulated with material service life |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202563014U (en) * | 2011-12-07 | 2012-11-28 | 中电电气(江苏)股份有限公司 | Transformer loss measurement control console |
| CN103063963A (en) * | 2012-12-30 | 2013-04-24 | 保定市汇邦电气有限公司 | Testing method of transformer capacity |
-
2015
- 2015-07-03 CN CN201510397430.6A patent/CN105004950A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202563014U (en) * | 2011-12-07 | 2012-11-28 | 中电电气(江苏)股份有限公司 | Transformer loss measurement control console |
| CN103063963A (en) * | 2012-12-30 | 2013-04-24 | 保定市汇邦电气有限公司 | Testing method of transformer capacity |
Non-Patent Citations (2)
| Title |
|---|
| 中华人民共和国国家质量监督检验检疫总局 等: "《中华人民共和国国家标准 电力变压器 第1部分:总则》", 31 March 2014 * |
| 百度文库: "低频变压器检验方法", 《百度文库》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108508313A (en) * | 2017-02-26 | 2018-09-07 | 武汉市欧睿科技有限公司 | A kind of detection method of power transformer |
| CN109901037A (en) * | 2019-04-04 | 2019-06-18 | 中国科学院电工研究所 | High frequency transformer factory insulation test voltage measuring method based on the insulated with material service life |
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Application publication date: 20151028 |
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| RJ01 | Rejection of invention patent application after publication |