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GB/T 27746-2011: Technical specification for metal oxide varistors (MOV) used in low-voltage apparatus
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 27746-2011 | English | 879 |
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Technical specification for metal oxide varistors (MOV) used in low-voltage apparatus
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GB/T 27746-2011
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Basic data | Standard ID | GB/T 27746-2011 (GB/T27746-2011) | | Description (Translated English) | Technical specification for metal oxide varistors (MOV) used in low-voltage apparatus | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K30 | | Classification of International Standard | 29.120.01 | | Word Count Estimation | 40,487 | | Date of Issue | 2011-12-30 | | Date of Implementation | 2012-05-01 | | Quoted Standard | GB/T 2423.2-2008; GB/T 2423.3-2006; GB/T 2423.22-2002; GB/T 2423.28-2005; GB/T 2423.30-1999; GB/T 2828.1-2003; GB/T 5169.5-2008; GB/T 5169.10-2006; GB/T 17627.1-1998; GB/T 18802.331-2007; IEC 60068-2-21-2006; IEC 60068-2-58-2005 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 22 of 2011 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the low-voltage electrical use of MOV: definition, classification, rating, use conditions, technical requirements, test methods, inspection rules. This standard applies to voltage not exceeding 1000V (RMS), 50/60Hz, and/or less than 1500 V dc electrical equipment with metal oxide varistors (hereinafter referred to as MOV), in order to suppress transient overvoltage protection electrical equipment safety. Used for low-voltage power protection metal oxide varistors should meet the GB/T 18802. 331 requirements. | GB/T 27746-2011: Technical specification for metal oxide varistors (MOV) used in low-voltage apparatus
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Technical specification for metal oxide varistors (MOV) used in low-voltage apparatus
ICS 29.120.01
K30
National Standards of People's Republic of China
Low-voltage electrical appliances with a metal oxide varistor (MOV)
specifications
Technicalspecificationformetaloxidevaristors (MOV) usedinlow-voltage
apparatus
Issued on. 2011-12-30
2012-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Preface Ⅰ
Introduction Ⅱ
1 Scope 1
2 Normative references 1
3 Terms and definitions, symbols 2
4 Category 6
4.1 In accordance with the nominal varistor voltage MOV distinguish 6
4.2 in accordance with the installation MOV distinction 6
4.3 according to special features distinguish MOV 6
4.4 in accordance with the host material MOV distinction 6
Rating 5 6
5.1 Leaded low pressure MOV rating 6
5.2 rating lead-pressure MOV 7
5.3 surface mount MOV rating 8
6 9 Conditions of Use
6.1 normal conditions of use 9
6.2 abnormal conditions of use 9
7 Technical requirements 9
7.1 General requirements
7.2 Electrical requirements 10
7.3 Requirements terminals 11
7.4 Environmental Requirements 12
8 12 Test Method
12 8.1 General Requirements
13 8.2 General Inspection
8.3 Electrical Test 13
8.4 Test terminals 19
21 8.5 Environmental Testing
9 inspection rules 23
23 9.1 Classification Test
9.2 Type tests 23
9.3 batch test 25
9.4 Periodic Inspection 25
Test pulse Appendix A (normative) This specification uses 27
Installation Appendix B (normative) when measured SMV type MOV 31
Appendix C (Informative Appendix) MOV failure and failure mode 33
Annex D (informative) standards cover about 34 symbols Summary
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
The standard proposed by China Electrical Equipment Industrial Association.
The low-voltage electrical standard by the National Standardization Technical Committee (SAC/TC189) centralized.
This standard is drafted by. Shanghai Electric Apparatus Research Institute, Changzhou City, a Czech mine Electronics Co., Ltd., Golden Delicious Nanyang Technology Co.,
the company.
Participated in the drafting of this standard. Zhejiang Chint Electric Co., Ltd., Yuyao Goodwin Electronics Co., Ltd., Zhejiang Electric Raytek
Co., Ltd., Shanghai Electric Co., Ltd. Electric Division.
The main drafters of this standard. quiet bunch, Li Yongxiang, Wang Biyun, yellow Jingye.
Participate drafters of this standard. Xiaohong Wei, Qian Chan, Chen Baolin.
Introduction
Low-voltage electrical switch is in rated AC voltage of 1000V, 1500V DC voltage and below the circuit for the circuit, control
System, detection, protection, transformation and regulation appliances, is the foundation supporting member composed of electrical equipment, the use of large, wide range of applications. Low pressure
Electrical circuits in use, inevitably circuit conduction of lightning over-voltage, over-voltage and electrostatic discharge, which can be over-voltage
So that electrical arcing contacts, the device insulation accelerated aging and damage, or interfere with adjacent circuits, therefore, over-voltage suppression devices must be used to limit them
System to a safe value. Currently, a metal oxide varistor (MOV) is used to suppress low-voltage electrical overvoltage is very extensive and by
Relief devices.
The reference to the standard GB/T 10193-2007 "varistor electronic equipment - Part 1. Generic specification" and ITU-TK.77
"Telecommunications equipment is protected with varistors (MOV) feature."
This standard is based on low-voltage electrical environment and specific application usage is proposed to meet the requirements of low-voltage electrical technology to MOV
Content requirements, test methods and inspection rules. This standard is intended to provide technical guidance for the low-voltage electrical use MOV manufacturers and users,
Bilateral coordination requirements to ensure MOV in low-voltage electrical energy to achieve the desired protection.
Low-voltage electrical appliances with a metal oxide varistor (MOV)
specifications
1 Scope
This standard specifies the low-voltage electrical use of MOV.
---definition;
---classification;
--- Rating;
---Conditions of Use;
---skills requirement;
---experiment method;
--- Inspection rules.
This standard applies to AC voltage does not exceed 1000V (rms), 50/60Hz and/or DC electrical voltage not exceeding 1500V
(Hereinafter referred to MOV), used to suppress transient voltage electrical equipment to protect the safety of metal oxide varistors.
Used for low-voltage surge protection metal oxide varistors should be consistent with GB/T 18802.331 requirements.
Note. AC voltage 1140V rated appliances may refer to this standard. Related to electrical performance and other requirements determined by the manufacturer and user consultation.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 2423.2-2008 Environmental testing for electric and electronic products Part 2. Test methods Test B. Dry heat (IEC 60068-2-
2.2007, IDT)
GB/T 2423.3-2006 Environmental testing for electric and electronic products Part 2. Test methods - Test Cab. Damp heat test
(IEC 60068-2-78.2001, IDT)
GB/T 2423.22-2002 Environmental testing for electric and electronic products Part 2. Test methods - Test N. Temperature change
(IEC 60068-2-14. 1984, IDT)
GB/T 2423.28-2005 Environmental testing for electric and electronic products Part 2. Test methods - Test T. Soldering (IEC 60068-
2-20. 1979, IDT)
GB/T 2423.30-1999 Environmental testing for electric and electronic products Part 2. Test methods Test XA and guidance. cleaning
Agent impregnation (IEC 60068-2-45.1993, IDT)
GB/T 2828.1-2003 Sampling procedures for inspection - Part 1. by acceptance quality limit (AQL) retrieval batch test sample
Programme (ISO 2859-1.1999IDT)
GB/T 5169.5-2008 Fire hazard testing for electric and electronic products - Part 5. Test flames - Needle-flame test methods for, indeed
Recognized test methods and guidance (IEC 60695-11-5.2004, IDT)
GB/T 5169.10-2006 Fire hazard testing for electric and electronic products - Part 10. Glowing/hot wire based test methods for burning
Hot wire apparatus and common test procedure (IEC 60695-2-10.2000, IDT)
GB/T 17627.1-1998 high voltage test techniques for low voltage equipment - Part 1. Definition and test requirements (IEC 61180-1.
1992, EQV)
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