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GB/T 18802.312-2017: Components for low-voltage surge protective devices -- Part 312: Selection and application principles for gas discharge tubes (GDT)
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Components for low-voltage surge protective devices -- Part 312: Selection and application principles for gas discharge tubes (GDT)
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GB/T 18802.312-2017
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Basic data | Standard ID | GB/T 18802.312-2017 (GB/T18802.312-2017) | | Description (Translated English) | Components for low-voltage surge protective devices -- Part 312: Selection and application principles for gas discharge tubes (GDT) | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K30 | | Classification of International Standard | 29.240.10 | | Word Count Estimation | 22,225 | | Date of Issue | 2017-12-29 | | Date of Implementation | 2018-07-01 | | Regulation (derived from) | National Standards Bulletin 2017 No. 32 | | 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 | GB/T 18802.312-2017: Components for low-voltage surge protective devices -- Part 312: Selection and application principles for gas discharge tubes (GDT)
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Components for low-voltage surge protective devices - Part 312. Selection and application principles for gas discharge tubes (GDT)
ICS 29.240.10
K30
National Standards of People's Republic of China
Low-voltage surge protector components
Part 312. Gas discharge tube (GDT)
Selection and use of guidelines
Part 312.Selectionandapplicationprinciplesforgasdischargetubes (GDT)
(IEC 61643-312.2013, IDT)
2017-12-29 Posted
2018-07-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Directory
Foreword Ⅲ
1 Scope 1
2 Normative references 1
3 Terms, definitions and symbols 1
3.1 Terms and definitions 1
3.2 symbol 4
4 operating conditions 5
4.1 General 5
4.2 low temperature 5
4.3 atmospheric pressure and altitude 5
4.4 Ambient temperature 5
4.5 relative humidity 5
5 mechanical requirements and materials 5
5.1 General 5
5.2 terminal firmness 5
5.3 weldability 5
5.4 Radioactivity 6
5.5 logo 6
6 General 6
Structure 7
7.1 Design 6
7.2 Description 6
7.3 Fault short circuit (fail safe) 7
8 function 8
8.1 Protection Principle 8
8.2 action mode 8
8.3 Response Characteristics 8
8.3.1 Static Response Characteristics
8.3.2 Dynamic Response Characteristics
8.4 Fault short circuit (fail safe) 9
9 Application 10
9.1 Protection circuit 10
9.1.1 General 10
9.1.2 Two terminals (signal line) protection 10
9.1.3 Three-terminal protection 11
9.1.4 Five-terminal protection 12
9.2 Telephone/Fax/Modem Protection 13
9.3 Cable/Coax Protection 13
9.4 AC Line Protection 14
References 15
Figure 1 GDT volt-ampere characteristics 3
Figure 2 2-pole GDT symbol 4
Figure 3 Three-pole GDT symbol 4
Figure 4 two-pole GDT 7
Figure 5 Three-pole GDT 7
Figure 6 with hot-melt isolated tin block three-pole GDT fault short circuit mechanism 7
Figure 7 plastic film for hot melt isolation of the three-pole GDT fault short circuit mechanism 8
Figure 8 Typical Response Characteristics of 230VGDT
Figure 9 discharge voltage and response time Example 9
Figure 10 current and fault short circuit mechanism response time curve through the GDT 10
Figure 11 both terminals (signal line) protection 11
Figure 12 Three-terminal Protection with 2-pole GDT 11
Figure 13 Three-terminal Protection with Three-pole GDT 11
Figure 14 Three-Terminal Protection Using Diode GDTs with Fault Short Circuit 12
Figure 15 Three-Terminal Protection Using Three-Terminal GDT with Fault Short-Circuit 12
Figure 16 Five-terminal Protection with 2-pole GDT 12
Figure 17 Five-terminal Protection with Three-pole GDT 12
Figure 18 Five-terminal Protection Using Diode GDTs with Fault Short Circuit 13
Figure 19 Five-terminal Protection Using Three-pole GDT with Fault Short-Circuit Mechanism 13
Figure 20 Protecting a Telephone/Fax/Modem with a 2-pole GDT 13
Figure 21 Three-pole GDT protection for telephone/fax/modem 13
Figure 22 CATV/Coax Protection 14
Figure 23 AC Line Protection 14
Foreword
GB/T 18802 "low voltage surge protector components" is divided into the following sections.
--- Part 311. Gas discharge tube (GDT) performance requirements and test circuit;
--- Part 312. Guidance on the selection and use of gas discharge tubes (GDTs);
--- Part 321 avalanche breakdown diode (ABD) specification;
--- Part 331. Metal Oxide Varistor (MOV) specification;
--- Part 341. Surge suppression thyristor (TSS) specification.
This section GB/T 18802 Part 312.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This section uses the translation method identical with IEC 61643-312.2013 "low-voltage surge protection components Part 312. Gas discharge tube
(GDT) Selection and Use Guide. "
The documents of our country that are consistent with the corresponding international documents that are normative references in this section are as follows.
--- 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 2423.60-2008 Environmental testing for electric and electronic products Part 2. Test methods Test U. Lead and the whole
Body Mounting Strength (IEC 60068-2-21.2006, IDT)
--- GB/T 18802.311-2017 Low voltage surge protection components - Part 311. Performance requirements of gas discharge tube (GDT)
And test circuit (IEC 61643-311.2013, IDT)
This part is proposed by China Electrical Equipment Industry Association.
This part of the National Arrester Standardization Technical Committee (SAC/TC81) centralized.
This part of the drafting unit. Wagner (Kunshan) Electronics Co., Ltd., Xi'an Institute of High Voltage Electric Co., Ltd., Changzhou,
Technology Co., Ltd., Shenzhen City, a Technology Development Co., Ltd., Shanghai Lightning Center, Changzhou City, a Czech anti-thunder Electronics Co., Ltd., Guiyang high-tech
Yi Electronics Co., Ltd., Xi'an Shendian Electric Co., Ltd., Sichuan Light Lightning Technology Co., Ltd., Tianjin Lightning protection technology have
Limited, Xiamen Saier Te Electronics Co., Ltd., Phoenix Contact Pacific Asia (Nanjing) Co., Ltd.
The main drafters of this section.Harok, Cheng Wenyi, Guo Yaping, He Hengwen, Zhou Qibin, Zhang Nanfa, Fei proud, Jia Dongxu, Lei Chengyong, Huang Yong,
Sun Weiwei, Zhang Xianggui, Xu Zhu Qin.
Low-voltage surge protector components
Part 312. Gas discharge tube (GDT)
Selection and use of guidelines
1 Scope
This section GB/T 18802 applies to the system nominal voltage does not exceed the exchange of 1000V or DC 1500V telecommunications, signal and low
Piezoelectric power distribution network used by the gas discharge tube. Gas discharge tubes (GDTs) are defined as sealed with two or three metal electrodes
Single gap or multiple gaps, internal mixed gas and pressure controllable, used to protect the equipment and/or personal harm from transient over-voltage. Headquarters
Subdivided to provide two or three gas discharge tube characteristics and application circuit. This section is neither a complete technical requirements for surge protectors,
Nor are all the technical requirements for using a gas discharge tube in electronic devices, where the performance of the gas discharge tube is compatible with the surge protector's ability to withstand
The exact match is critical.
GB/T 18802 of this section.
--- Does not involve installation and its impact on the performance of the gas discharge tube, given the performance is only applicable to test the requirements of the installation of gas
Tube
--- Does not involve mechanical dimensions;
--- Does not involve quality assurance requirements;
--- For the use of high-frequency (frequency > 30MHz) GDT may not be sufficient;
--- Does not involve static voltage;
--- Does not involve hybrid overvoltage protection components or combination of devices.
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.
IEC 60068-2-1 Environmental testing - Part 2-1. Tests and tests A. Low temperature (Environmental testing-Part 2-1).
Tests-TestA.Cold)
IEC 60068-2-20 Environmental tests - Part 2-20. Test methods Tests T Test of lead soldering resistance and solderability
Environmental testing-Part 2-20. Tests-Test.T.Test methods
resistancetosolderingheatofdeviceswithleads)
IEC 60068-2-21 Environmental tests - Part 2-21. Tests U. Firmness of the terminals and the overall mounting device (Envi-
ronmentaltesting-Part 2-21.Tests-TestU.Robustnessofterminationsandintegralmountingde-
vices
IEC 61643-311 Low voltage surge protection components - Part 311. Performance requirements and test loops for gas discharge tubes (GDT)
[Componentsforlow-voltagesurgeprotectivedevices-Part 311.Specificationforgasdischargetubes
(GDT)]
3 Terms, definitions and symbols
3.1 Terms and definitions
The following terms and definitions apply to this document.
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