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GB/T 18802.312-2017Components for low-voltage surge protective devices -- Part 312: Selection and application principles for gas discharge tubes (GDT) (English PDF)

低压电涌保护器元件第312部分：气体放电管(GDT)的选择和使用导则

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Issued by

General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

Level / Type

National · Recommended

Issue date

December 29, 2017

Implementation date

July 1, 2018

Scope

GB/T 18802.312-2017 is the English-translated version of 低压电涌保护器元件第312部分：气体放电管(GDT)的选择和使用导则.

GB/T 18802.312-2017 — 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.

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Document preview — GB/T 18802.312-2017

National Standard of the People's Republic of China

ICS: 29.240.10
Classification: K 30

Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbol
4 Operating conditions
4.1 General
4.2 Low temperature
4.3 Atmospheric pressure and altitude
4.4 Ambient temperature
4.5 Relative humidity
5 Mechanical requirements and materials
5.1 General
5.2 Terminal firmness
5.3 Weldability
5.4 Radioactivity
5.5 Logo
6 General
Structure
7.1 Design
7.2 Description
7.3 Fault short circuit (fail safe)
8 Function
8.1 Protection Principle
8.2 Action mode
8.3 Response Characteristics
8.3.1 Static Response Characteristics
8.3.2 Dynamic Response Characteristics
8.4 Fault short circuit (fail safe)
9 Application
9.1 Protection circuit
9.1.1 General
9.1.2 Two terminals (signal line) protection
9.1.3 Three-terminal protection
9.1.4 Five-terminal protection
9.2 Telephone/Fax/Modem Protection
9.3 Cable/Coax Protection
9.4 AC Line Protection
References
Figure 1 GDT volt-ampere characteristics
Figure 2 2-pole GDT symbol
Figure 3 Three-pole GDT symbol
Figure 4 two-pole GDT
Figure 5 Three-pole GDT
Figure 6 with hot-melt isolated tin block three-pole GDT fault short circuit mechanism
Figure 7 plastic film for hot melt isolation of the three-pole GDT fault short circuit mechanism
Figure 8 Typical Response Characteristics of 230VGDT
Figure 9 discharge voltage and response time Example
Figure 10 current and fault short circuit mechanism response time curve through the GDT
Figure 11 both terminals (signal line) protection
Figure 12 Three-terminal Protection with 2-pole GDT
Figure 13 Three-terminal Protection with Three-pole GDT
Figure 14 Three-Terminal Protection Using Diode GDTs with Fault Short Circuit
Figure 15 Three-Terminal Protection Using Three-Terminal GDT with Fault Short-Circuit
Figure 16 Five-terminal Protection with 2-pole GDT
Figure 17 Five-terminal Protection with Three-pole GDT
Figure 18 Five-terminal Protection Using Diode GDTs with Fault Short Circuit
Figure 19 Five-terminal Protection Using Three-pole GDT with Fault Short-Circuit Mechanism
Figure 20 Protecting a Telephone/Fax/Modem with a 2-pole GDT
Figure 21 Three-pole GDT protection for telephone/fax/modem
Figure 22 CATV/Coax Protection
Figure 23 AC Line Protection

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.

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.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

IEC 60068 · IEC 61643

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