GB/T 16935.3-2016 English PDF (GBT16935.3-2016)

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GB/T 16935.3-2016: Insulation coordination for equipment within low-voltage systems -- Part 3: Use of coating, potting or moulding for protection against pollution
GB/T 16935.3-2016
Insulation coordination for equipment within low-voltage systems - Part 3. Use of coating, potting or molding for protection against pollution
ICS 29.120
K30
National Standards of People's Republic of China
Replacing GB/T 16935.3-2005
Low voltage system equipment with the insulation
Part 3. Use of coatings, cans and closures
Molded anti-fouling protection
Part 3. Useofcoating, pottingormouldingforprotectionagainstpolution
(IEC 60664-3..2010, IDT)
Posted on.2016-04-25
2016-11-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Directory
Preface Ⅰ
Introduction Ⅱ
1 range 1
2 Normative references 1
3 Definition 2
4 design requirements 3
5 Test 4
Appendix A (Normative) Test Procedure 10
Appendix B (normative) to determine the relevant product standards 11
Appendix C (Normative) Printed wiring board for coating test
References 15
Foreword
GB/T 16935 "Insulation coordination of low voltage system equipment" is expected to be divided into the following sections.
--- Part 1. Principles, requirements and tests;
--- Part 2-1. Application Guidance GB/T 16935 series of application, size examples and dielectric test;
--- Part 2-2. Interface considerations - Application Note;
--- Part 3. The use of coating, sealing and molding anti-fouling protection;
--- Part 4. high-frequency voltage stress considerations;
--- Part 5. Determination of clearances and creepage distances not exceeding 2mm.
This section GB/T 16935 Part 3.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 16935.3-2005 "Insulation coordination of equipment within low-voltage systems Part 3. The use of coating, sealing and molding
Anti-fouling protection ", compared with GB/T 16935.3-2005 this section, the main technical differences are as follows.
--- 4.4 "Size Determination Program" clearly type 2 protection of the minimum spacing of the provisions of the same applies to functional insulation;
--- 5.5 "Scratch Resistance Test", modify the first paragraph and add a note, the scratch test for the specific parts of the more accurate
Exact description
--- 5.6 "Visual inspection", 5.8.3 "Insulation resistance between conductors", 5.8.4 "AC withstand voltage test", 5.9.1 "Resistance to solder heat",
5.9.2 "Flammability" and reference standard in Appendix A IEC 60326-2 "Printed Board Part 2. Test Method" is replaced by
IEC 61189-3 "Test methods for electrical materials, printed boards and other interconnecting structures and assemblies - Part 3. Interconnection structures
(PCB) test method "to update the test basis and method;
--- 5.9.3 "Solubility" and Appendix A, the anti-soluble requirements "according to IEC 60326-2 in 8.5, using methylene chloride" to "use
User and supplier to determine the organic solvent. "
This section uses the translation method is equivalent to using IEC 60664-3..2010 (Version 2.1) "Low-voltage system equipment with insulation Part 3
Points. the use of coating, sealing and molding anti-fouling protection. " This section should be GB/T 16935.1-2008 "Low-voltage system equipment insulation
Part 1. Principles, Requirements and Tests "(IEC 60664-1..2007, IDT).
The documents of our country that are in conformity with the corresponding international documents that are normative references in this part are as follows.
--- GB/T 4677-2002 Printed circuit board test method (eqvIEC 60326-2..1990).
This section made the following editorial changes.
--- 5.7.4.1 and 5.8.1 in the "93" suspected wrong, change it to "93% ± 3%."
This part is proposed by China Electrical Equipment Industry Association.
This part of the National Low Voltage Equipment Insulation Coordination Technical Committee (SAC/TC417) centralized.
This section is responsible for drafting unit. Shanghai Electric Apparatus Research Institute.
Participated in the drafting of this section. Delixi Electric Co., Ltd., Changshu Switch Manufacturing Co., Ltd. (formerly Changshu Switch Factory).
The main drafters of this section. Huang Jingye, leather, Wu Qingyun, Zhang Lili, Lin Chuan, Zhou Jianxing.
This part of the standard replaces the previous editions are.
--- GB/T 16935.3-2005.
introduction
This section GB/T 16935 specifies the conditions for rigid components (such as printed circuit boards and component terminals), the article
Under the components, the clearances and creepage distances of the components can be reduced. It can be done in any type of package, such as coating, potting or molding
Anti-fouling protection. This protection can be applied on one or both sides of the assembly. This section provides the insulation properties of protective materials.
Between any two unprotected conductive parts, GB/T 16935.1-2008 and GB/T 16935.5-2008 in the electrical room
The requirements for clearance and creepage distances apply.
This section relates only to permanent protection does not apply to the repaired components.
Relevant product standards need to consider the impact on superheat conductors and component protection, especially under fault conditions, and determine if
Necessary to add additional requirements.
For protection system applications, the safety of a component depends on a precise and controlled manufacturing process. Quality control requirements, for example
Such as sampling test, should be considered in the product standards.
Low voltage system equipment with the insulation
Part 3. Use of coatings, cans and closures
Molded anti-fouling protection
1 Scope
GB/T 16935 This section applies to the use of coating, can sealing and molding anti-fouling protection components, such components clearance and
Creepage distances may be less than the clearances and creepage distances specified in Part 1 or Part 5.
Note 1. Part 1 refers to GB/T 16935.1-2008, Part 5 refers to GB/T 16935.5-2008.
This section provides two types of protection requirements and test procedures.
--- Type 1 protection for improving the micro-environment of the components to be protected;
--- Type 2 protection similar to solid insulation.
This section also applies to all types of protected printed circuit boards, including multilayer printed circuit board inner surface of the substrate and similar protected group
Pieces. For multilayer printed boards, the requirements for the distance through an inner layer are included in the solid insulation requirements of Part 1.
Note 2. For example, the substrate can be made of hybrid integrated circuits and thick film technology.
This section relates only to permanent protection does not apply to the mechanical adjustment and repair of components.
The principle of this section applies to functional insulation, basic insulation, additional insulation and reinforced insulation.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 2423.1-2008 Environmental testing for electric and electronic products Part 2. Test methods Test A. Low temperature (IEC 60068-2-1.
2007, IDT)
GB/T 2423.2-2008 Environmental testing for electric and electronic products Part 2. Test methods Test B. High temperature (IEC 60068-2-2.
2007, IDT)
GB/T 2423.3-2006 Environmental testing for electric and electronic products Part 2. Test methods Test Cab. constant hot and humid test
(IEC...