GB/T 1408.1-2016 English PDF (GBT1408.1-2016)

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GB/T 1408.1-2016: Insulating materials -- Test methods for electric strength -- Part 1: Test at power frequencies
GB/T 1408.1-2016
Insulating materials--Test methods for electric strength--Part 1. Test at power frequencies
ICS 29.035.99
K15
National Standards of People's Republic of China
Replace GB/T 1408.1-2006
Insulation material electrical strength test method
Part 1. Test under power frequency
Released on December 13,.2016
2017-07-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration issued
Content
Foreword I
1 range 1
2 Normative references 1
3 Terms and Definitions 2
4 Test significance 2
5 electrodes and sample 3
6 Conditional treatment before test 6
7 surrounding medium 7
8 Electrical equipment 7
9 Test procedure 8
10 boost mode 8
11 breakdown judgment 10
12 trials 10
13 Test report 10
Appendix A (informative) Test data and processing 18
Reference 19
Foreword
GB/T 1408 "Insulation Material Electrical Strength Test Method" is divided into the following three parts.
--- Part 1. Test under power frequency;
--- Part 2. Additional requirements for the application of DC voltage tests;
--- Part 3. 1.2/50μs impact test supplementary requirements.
This part is the first part of GB/T 1408.
This part replaces GB/T 1408.1-2006 "Insulation material electrical strength test method Part 1. Test under power frequency". versus
The main technical changes compared with GB/T 1408.1-2006 are as follows.
---Modified "normative references" (see Chapter 2, Chapter 2 of the.2006 edition);
--- Increased the test requirements for "ball plate electrodes" (see 5.2.1.3);
--- Increased the test requirements for "elastomers" (see 5.2.6.2.4);
--- Added "test in solid materials" (see 7.4);
--- Added schematic diagram of "ball plate electrode" [see Figure 1c)];
--- Removed Appendix B (see Appendix B of the.2006 edition).
This part uses the translation method equivalent to IEC 60243-1.2013 "Insulation material electrical strength test method Part 1. Power frequency
Test" (3rd edition).
The documents of our country that have a consistent correspondence with the international documents referenced in this part are as follows.
Paints for electrical insulation - Part 2. Test methods (IEC 60464-2.2001, MOD)
---GB 2536-2011 Unused mineral insulating oil for electrical liquid transformers and switches (IEC 60296.2003,
MOD)
---GB/T 5471-2008 Compression molding of plastic thermosetting plastic samples (ISO 295.2004, IDT)
Insulated hoses - Part 2. Test methods (IEC 60684-2.2003, MOD)
---GB/T 9352-2008 Compression molding of plastic thermoplastic materials (ISO 293.2004, IDT)
---GB/T 10580-2015 Standard conditions for the use of solid insulating materials before and during testing (IEC 60212.2010,
IDT)
GB -T 15022.2-2007 Resin-based reactive composites for electrical insulation - Part 2. Test methods (IEC 60455-2.
1998, MOD)
Plastics -- Thermoplastics -- Preparation of injection mouldings - Part 3 . slabs ( ISO )
294-3.2002, IDT)
---GB/T 21218-2007 Unused silicon insulating liquid for electrical (IEC 60836.2005, IDT)
This part was proposed by China Electrical Equipment Industry Association.
This part is under the jurisdiction of the National Technical Committee for Standardization of Electrical Insulation Materials and Insulation Systems (SAC/TC301).
This section drafted by. Suzhou Taihu Electric New Materials Co., Ltd., Yantai Minstar Special Paper Co., Ltd., mechanics
Beijing Institute of Electrical and Mechanical Technology, Shanghai Cable Research Institute, Zhuzhou Times Electric Insulation Co., Ltd., Guilin Electric Apparatus Research Institute
Limited.
The main drafters of this section. Chen Yu, Zhang Chunqi, Guo Zhenyan, Wang Dianxin, Xu Xiaofeng, Xia Junfeng, Liu Yali, Zeng Zhi, Zhang Junhua, Wang Yizhen,
Wu Bin, Wang Xianfeng.
The previous versions of the standards replaced by this section are.
---GB/T 1408-1978, GB/T 1408-1989, GB/T 1408.1-1999, GB/T 1408.1-2006.
Insulation material electrical strength test method
Part 1. Test under power frequency
1 Scope
This part of GB/T 1408 proposes a test method for determining the short-term electrical strength of a solid insulation material at a power frequency (ie 48 Hz to 62 Hz).
This section specifies the impregnating agent or surrounding medium when testing liquids and gases as solid insulating materials, but not for liquids and gases.
Body test.
Note. This section includes methods for determining the breakdown voltage of a solid insulating material.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
ISO 293 plastic thermoplastic compression molded specimen (Plastics-Compressionmouldingoftestspecimensof
Catalyst materials)
Plastics -- Thermoplastic injection mouldings - Part 1 . General principles and versatile mouldings and strips (Plas-
tics-Injectionmouldingoftestspecimensofthermoplasticmaterials-Part 1.Generalprinciples,and
Mouldingofmultipurposeandbartestspecimens)
ISO 294-3 Plastics -- Thermoplastic injection molded specimens - Part 3. Plastics-Injectionmouldingof
testspecimensofthermoplasticmaterials-Part 3.Smalplates)
ISO 295 plastic thermoset compression molded specimen (Plastics-Compressionmouldingoftestspecimensof
Thermosettingmaterials)
ISO 10724 (all parts) Plastic thermosetting powder molding composite injection molded specimens (Plastics-Injectionmoulding
Oftestspecimensofthermosettingpowdermouldingcompounds)
Standard conditions for the use of IEC 60212 solid electrical insulating materials during testing and before testing (Standardconditionsforuseprior
Toandduringthetestingofsolidelectricalinsulatingmaterials)
IEC 60296 Unused mineral insulating oil for liquid transformers and switchgear used in electrical engineering (Fluidsforelectrotech-
nicalapplications-Unusedmineralinsulatingoilsfortransformersandswitchgear)
Specification for solvent-free polymerizable resin compounds for electrical insulation - Part 2. Test method (Specification for
solvent-lesspolymerizableresinouscompoundsusedforelectricalinsulation-Part 2.Methodsoftest)
Paints for electrical insulation - Part 2. Test methods (Varnishesusedforelectricalinsulation-Part 2.
Methodsoftest)
IEC 60684-2 insulating flexible bushings - Part 2. Test methods (Flexibleinsulatingsleeving-Part 2.Methods
Oftest)
IEC 60836 Specification for unused silicon-insulated liquids for electrical equipment (Specificationsforunusedsiliconeinsulating
Liquidsforelectrotechnicalpurposes)
IEC 61099 Insulating Liquids for Electrically Unused Synthetic Organic Ester Specifications (Insulatingliquids-Specificationsfor
Unusedsyntheticorganicestersforelectricalpurposes)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Electrical breakdown electricalbreakdown
When the sample is subjected to electrical stress, its insulation performance is seriously lost, thereby causing the test loop current to promote the corresponding circuit breaker.
action.
Note. Breakdown is usually caused by partial discharge in the gas or liquid medium around the sample and the electrode, and makes the small electrode (or two electrodes if the two electrodes are straight
If the diameter is the same, the sample at the edge is destroyed.
3.2
Flashover flashover
Under the action of electrical stress, the i...