CN110007202A - A kind of proficiency testing and its sample preparation methods of electrical strength test - Google Patents
A kind of proficiency testing and its sample preparation methods of electrical strength test Download PDFInfo
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- CN110007202A CN110007202A CN201910335168.0A CN201910335168A CN110007202A CN 110007202 A CN110007202 A CN 110007202A CN 201910335168 A CN201910335168 A CN 201910335168A CN 110007202 A CN110007202 A CN 110007202A
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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
- G01R31/12—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
-
- 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
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
-
- 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
- G01R31/20—Preparation of articles or specimens to facilitate testing
Abstract
The invention discloses the proficiency testing and its sample preparation methods of a kind of test of electrical strength, S1, electrical strength test specimen design and preparation, there is six test leads of number 1-6 on sample；S2, test include two projects, and project one is " to apply alternating voltage V between test lead 1 and 21", it sees whether to puncture, project two is " to apply alternating voltage V between test lead 3 and 42", it measures and records and exchanges partial pressure value V between test lead 5 and 63；S3, when " whether puncturing " result of project one is consistent with designated value, then be satisfactory result；Partial pressure value V is exchanged between S4, calculating test lead 5 and 63Z value,When | Z | it is then satisfactory result when≤2；S5, when project one and two result of project are to be satisfied with, then may determine that and meet the requirements of the standard, the present invention can be utilized repeatedly, effectively improve service life, reduce cost, guarantee sample size, and can also verification test voltage it is whether correct, improve testing accuracy.
Description
Technical field
The present invention relates to electrical strength examine detection technique field more particularly to a kind of electrical strength test proficiency testing and
Its sample preparation methods.
Background technique
Proficiency testing is that whether there is or not carry out a certain inspection detection activity, provide legal effective inspection in evaluation one laboratory
The ability of examining report, the purpose of proficiency testing are to guarantee that the operation in laboratory meets the requirement of quality management, the result provided
It is fair and just, legal effective.
China's certification, approval department extremely pay attention to proficiency testing work, in addition to actively tracking the dynamic of international proficiency testing
Except state, after ISO 17043:2010 announcement, by Chinese Conformity Assessment Committee (CNAS) and China Institute of Standardization
Etc. units cooperation, converting standard GB/T/T 27043-2012 for ISO 17043 rapidly, " conformity assessment proficiency testing is general
It is required that ".
The proficiency testing tested by electrical strength, it will be appreciated that the survey of domestic laboratory electric product electrical strength test
Examination is horizontal, provides an assessment for laboratory and proves that it provides the objective means of data reliability, laboratory discovery is helped to survey
The problem of examination, improves the detectability in laboratory, and then the integrated testability for improving industry is horizontal.
Electrical strength test is also known as pressure test, is one of most important test of verifying electric product security feature, for
Various insulating materials, cable, motor, transformer, capacitor, electronic device, sensor and certain electromechanical equipments, instrument and meter,
The pressure resistance or breakdown for requiring to carry out defined alternating current and direct current or high voltage pulse in production process are being developed and criticized to household electrical appliance etc.
Test determines the safe handling range and improvement direction from now on of material, guarantees material to measure the pressure resistance limit of material
The reliable normal operation using with equipment.
Test can generally provide a test voltage, then slowly boost from the half of test voltage, in the process of boosting
In, whether observation sample is breakdown (electric current increases over limit value, generally 100mA suddenly), and at low voltage, electric current is with outer
Making alive linear change, when applied voltage is close or equal to breakdown voltage, variation relation does not meet Ohm's law, and electric current is prominent
So increase, until dielectric breakdown, the size of breakdown current is with the different and widely different of material, test specimen and breakdown degree of expansion.
If using general insulating materials, cable, motor, transformer, capacitor, electronic device, sensor and certain
Electromechanical equipment, instrument and meter, household electrical appliance etc. are used as test specimen, these samples are destructive sample, are used only once,
It cannot reuse, the uniformity of sample, stability test can only be carried out by way of sampling, and at high cost, difficulty is big.
Currently, the electrical strength sample in industry is a simple resistor voltage divider circuit, being able to validate only test voltage is
It is no correct, and the state of " not puncturing " can only be provided, because once puncturing, resistance damage, sample can not be reused, the party
Method can not validation laboratory for test in " breakdown " situation judgement, a voltage capability Verification Project can only be calculated, then grinding
Effect that sending out a can simulate " breakdown ", and can reuse, and can also the whether correct electricity of verification test voltage
Gas strength capabilities verification sample is just particularly important.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of electrical strength test proposed
Proficiency testing and its sample preparation methods.
To achieve the goals above, present invention employs following technical solutions:
The proficiency testing and its sample preparation methods of a kind of electrical strength test, the proficiency testing of electrical strength test and
Its sample preparation methods includes the following steps:
S1, electrical strength test specimen design and preparation, there is six test leads of number 1-6 on sample；
S2, electrical strength Proficiency testing, test include two projects, and project one is " to apply between test lead 1 and 2
Add alternating voltage V1", observe and record whether sample generates punch-through, project two is " to apply between test lead 3 and 4 and hand over
Galvanic electricity presses V2", it measures and records and exchanges partial pressure value V between test lead 5 and 63；
The evaluation of result of S3, project one, when " whether puncturing " result of project one is consistent with designated value, then one knot of project
Fruit is satisfactory result；
The evaluation of result of S4, project two calculate and exchange partial pressure value V between test lead 5 and 63Z value,When | Z | when≤2, then illustrate that two result of project is satisfactory result；
S5, when project one and two result of project are to be satisfied with, then may determine that the ability of its electrical strength test is symbol
What standardization required.
Preferably, the sample interior includes two independent circuits, and is respectively the circuit for simulating breakdown effect
With the resistance circuit for dividing test voltage.
It preferably, include a ceramic gas discharge tube (GDT) inside the circuit of the simulation breakdown effect, when test electricity
When pressure is not up to circuit design value, circuit is off-state, and the test result of voltage-withstand test is " not puncturing ", works as test voltage
When reaching circuit design value, circuit is transformed into short-circuit condition, and the test result of voltage-withstand test is " breakdown ".
Preferably, the circuit of the simulation breakdown effect includes that 1 test lead of number, 2 test lead of number and ceramic gas are put
Fulgurite (GDT), and 1 test lead of number and 2 test lead of number pass through the both ends that circuit is connected in series to ceramic gas discharge tube respectively.
Preferably, the resistance circuit that test voltage is divided includes 3 test lead of number, the test of number 4, number
5 test leads, the test of number 6, resistance R1 and resistance R4, and 3 test lead of number is in series with resistance R1 by circuit, resistance R1 passes through
Circuit is in series with resistance R4, and resistance R4 is in series with 4 test lead of number by circuit, and resistance R1 and resistance R4 pass through circuit in parallel
There is 5 test lead of number, resistance R4 has 6 test lead of number by circuit in parallel.
Preferably, the designated value in the step S4, Capacity Evaluation standard deviation acquisition methods include the following steps:
P1, the test for carrying out step S2 respectively by 17 and the above laboratory, accordingly obtain 17 or more test leads 5
Partial pressure value V is exchanged between 63；
P2, the steady average value obtained by robust statistics algorithm are as designated value, and robust statistics standard deviation is as ability
Evaluation criteria is poor.
The proficiency testing and its sample preparation methods of a kind of electrical strength test provided by the invention use ceramic discharge tube,
The effective ceramic enclosed package of ceramic discharge, the internal metal electrode by two or more band gaps are filled with inert gas argon gas, neon
Gas is constituted, and when the voltage for being added to two electrode tips reaches the gas breakdown made in gas-discharge tube, gas-discharge tube starts to discharge,
Low ESR is become by high impedance, after loss of voltage, ceramic discharge tube extinguishing is restored to high impedance status, and waiting is moved next time
Make, can repeatedly utilize, effectively improve service life, reduces cost, and guarantee test efficiency, while passing through the resistance of partial pressure
Circuit carries out multiple voltage detecting, can guarantee sample size, and can also verification test voltage it is whether correct, improve and examine essence
Degree.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.
A kind of proficiency testing and its sample preparation methods of electrical strength test, the ability of electrical strength test are tested
Card and its sample preparation methods include the following steps:
S1, electrical strength test specimen design and preparation, there is six test leads of number 1-6 on sample；
S2, electrical strength Proficiency testing, test include two projects, and project one is " to apply between test lead 1 and 2
Add alternating voltage V1", observe and record whether sample generates punch-through, project two is " to apply between test lead 3 and 4 and hand over
Galvanic electricity presses V2", it measures and records and exchanges partial pressure value V between test lead 5 and 63；
The evaluation of result of S3, project one, when " whether puncturing " result of project one is consistent with designated value, then one knot of project
Fruit is satisfactory result；
The evaluation of result of S4, project two calculate and exchange partial pressure value V between test lead 5 and 63Z value,When | Z | when≤2, then illustrate that two result of project is satisfactory result；
S5, when project one and two result of project are to be satisfied with, then may determine that the ability of its electrical strength test is symbol
What standardization required.
Preferably, the sample interior includes two independent circuits, and is respectively the circuit for simulating breakdown effect
With the resistance circuit for dividing test voltage.
It preferably, include a ceramic gas discharge tube (GDT) inside the circuit of the simulation breakdown effect, when test electricity
When pressure is not up to circuit design value, circuit is off-state, and the test result of voltage-withstand test is " not puncturing ", works as test voltage
When reaching circuit design value, circuit is transformed into short-circuit condition, and the test result of voltage-withstand test is " breakdown ", when test voltage reaches
When circuit design value, circuit can be transformed into short-circuit condition, and the test result of voltage-withstand test is " breakdown ", when selection 2500V (±
10%) when ceramic gas discharge tube, if test voltage is defined as 2500V (± 10%) hereinafter, such as 2000V,
The test result of sample is exactly " not puncturing ", when test voltage to be defined as to 2500V (± 10%) or more, such as 3000V
So the test result of sample exactly " punctures ", can according to need the ceramic gas discharge tube of selection different model specification to set
Count this simulation breakdown circuit.
Preferably, the circuit of the simulation breakdown effect includes that 1 test lead of number, 2 test lead of number and ceramic gas are put
Fulgurite (GDT), and 1 test lead of number and 2 test lead of number pass through the both ends that circuit is connected in series to ceramic gas discharge tube respectively.
Preferably, the resistance circuit that test voltage is divided includes 3 test lead of number, the test of number 4, number
5 test leads, the test of number 6, resistance R1 and resistance R4, and 3 test lead of number is in series with resistance R1 by circuit, resistance R1 passes through
Circuit is in series with resistance R4, and resistance R4 is in series with 4 test lead of number by circuit, and resistance R1 and resistance R4 pass through circuit in parallel
There is 5 test lead of number, resistance R4 has 6 test lead of number by circuit in parallel, the resistance electricity for dividing test voltage
Road can go out the total electricity tested by the intrinsic standoff ratio K of voltage and circuit design on the divider resistance that measures with inverse
Whether pressure is correct, and while it is noted that, the voltage tester equipment in laboratory has voltmeter, oscillograph etc., some of
The internal resistance of equipment is smaller, only 10M Ω or so, therefore the all-in resistance of sample is not answered excessive, is recommended as 1M Ω or so, when test electricity
When pressure is 1000V-3000V, the electric current in circuit is 1-3mA, the far smaller than tripping current of pressure tester itself
100mA will not generate mistrip.Optional 40-the 60K of divider resistance.
Preferably, the designated value in the step S4, Capacity Evaluation standard deviation acquisition methods include the following steps:
P1, the test for carrying out step S2 respectively by 17 and the above laboratory, accordingly obtain 17 or more test leads 5
Partial pressure value V is exchanged between 63；
P2, the steady average value obtained by robust statistics algorithm are as designated value, and robust statistics standard deviation is as ability
Evaluation criteria is poor, and robust statistics algorithm " carries out the statistics of proficiency testing using contrasting between laboralories with reference to GB/T 28043-2011
Method " in appendix C method A, belong to art methods.
The proficiency testing and its sample preparation methods of a kind of electrical strength test provided by the invention use ceramic discharge tube,
The effective ceramic enclosed package of ceramic discharge, the internal metal electrode by two or more band gaps are filled with inert gas argon gas, neon
Gas is constituted, and when the voltage for being added to two electrode tips reaches the gas breakdown made in gas-discharge tube, gas-discharge tube starts to discharge,
Low ESR is become by high impedance, after loss of voltage, ceramic discharge tube extinguishing is restored to high impedance status, and waiting is moved next time
Make, can repeatedly utilize, effectively improve service life, reduces cost, and guarantee test efficiency, while passing through the resistance of partial pressure
Circuit carries out multiple voltage detecting, can guarantee sample size, and can also verification test voltage it is whether correct, improve and examine essence
Degree.
Claims (6)
1. a kind of proficiency testing and its sample preparation methods of electrical strength test, it is characterised in that: electrical strength test
Proficiency testing and its sample preparation methods include the following steps:
S1, electrical strength test specimen design and preparation, there is six test leads of number 1-6 on sample；
S2, electrical strength Proficiency testing, test include two projects, and project one is " to apply between test lead 1 and 2 and hand over
Galvanic electricity presses V1", observe and record whether sample generates punch-through, project two is " to apply alternating current between test lead 3 and 4
Press V2", it measures and records and exchanges partial pressure value V between test lead 5 and 63；
The evaluation of result of S3, project one, when " whether puncturing " result of project one is consistent with designated value, then one result of project is
Satisfactory result；
The evaluation of result of S4, project two calculate and exchange partial pressure value V between test lead 5 and 63Z value,When | Z | when≤2, then illustrate that two result of project is satisfactory result；
S5, when project one and two result of project are to be satisfied with, then may determine that the ability of its electrical strength test is to meet mark
Alignment request.
2. according to proficiency testing and its sample preparation methods that a kind of electrical strength of the claim 1 is tested, feature exists
In: the sample interior includes two independent circuits, and is respectively to puncture the circuit of effect and for that will test for simulating
The resistance circuit that voltage is divided.
3. according to proficiency testing and its sample preparation methods that a kind of electrical strength of the claim 2 is tested, feature exists
In: it include a ceramic gas discharge tube (GDT) inside the circuit of the simulation breakdown effect, when test voltage is not up to circuit
When design value, circuit is off-state, and the test result of voltage-withstand test is " not puncturing ", when test voltage reaches circuit design
When value, circuit is transformed into short-circuit condition, and the test result of voltage-withstand test is " breakdown ".
4. according to proficiency testing and its sample preparation methods that a kind of electrical strength of the claim 2 is tested, feature exists
In: the circuit of the simulation breakdown effect includes 1 test lead of number, 2 test lead of number and ceramic gas discharge tube (GDT), and
1 test lead of number and 2 test lead of number pass through the both ends that circuit is connected in series to ceramic gas discharge tube respectively.
5. according to proficiency testing and its sample preparation methods that a kind of electrical strength of the claim 2 is tested, feature exists
In: the resistance circuit that test voltage is divided includes 3 test lead of number, the test of number 4,5 test lead of number, number
6 tests, resistance R1 and resistance R4, and 3 test lead of number is in series with resistance R1 by circuit, resistance R1 is in series with electricity by circuit
R4 is hindered, resistance R4 is in series with 4 test lead of number by circuit, and resistance R1 and resistance R4, which pass through circuit in parallel, the test of number 5
End, resistance R4 have 6 test lead of number by circuit in parallel.
6. according to proficiency testing and its sample preparation methods that a kind of electrical strength of the claim 2 is tested, feature exists
In: designated value, Capacity Evaluation standard deviation acquisition methods in the step S4 include the following steps:
P1, the test for carrying out step S2 respectively by 17 and the above laboratory, accordingly obtain 17 or more test leads 5 and 6
Between exchange partial pressure value V3；
P2, the steady average value obtained by robust statistics algorithm are as designated value, and robust statistics standard deviation is as Capacity Evaluation
Standard deviation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910335168.0A CN110007202A (en) | 2019-04-24 | 2019-04-24 | A kind of proficiency testing and its sample preparation methods of electrical strength test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910335168.0A CN110007202A (en) | 2019-04-24 | 2019-04-24 | A kind of proficiency testing and its sample preparation methods of electrical strength test |
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| CN110007202A true CN110007202A (en) | 2019-07-12 |
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| CN201910335168.0A Withdrawn CN110007202A (en) | 2019-04-24 | 2019-04-24 | A kind of proficiency testing and its sample preparation methods of electrical strength test |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156273A (en) * | 2021-01-04 | 2021-07-23 | 威凯检测技术有限公司 | Method and device for verifying electrical strength test capability |
| CN114216916A (en) * | 2021-09-29 | 2022-03-22 | 中材锂膜有限公司 | Method for testing electric resistance strength of diaphragm |
| CN113156273B (en) * | 2021-01-04 | 2024-04-26 | 威凯检测技术有限公司 | Electrical strength test capability verification method and device |
-
2019
- 2019-04-24 CN CN201910335168.0A patent/CN110007202A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156273A (en) * | 2021-01-04 | 2021-07-23 | 威凯检测技术有限公司 | Method and device for verifying electrical strength test capability |
| CN113156273B (en) * | 2021-01-04 | 2024-04-26 | 威凯检测技术有限公司 | Electrical strength test capability verification method and device |
| CN114216916A (en) * | 2021-09-29 | 2022-03-22 | 中材锂膜有限公司 | Method for testing electric resistance strength of diaphragm |
| CN114216916B (en) * | 2021-09-29 | 2024-01-19 | 中材锂膜有限公司 | Method for testing electric strength of diaphragm |
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Application publication date: 20190712 |
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