GSO IEC 61643-311:2014
Gulf Standard
Current Edition
·
Approved on
25 December 2014
·
Components for low-voltage surge protective devices - Part 311: Performance requirements and test circuits for gas discharge tubes (GDT)
GSO IEC 61643-311:2014 Files
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GSO IEC 61643-311:2014 Scope
This part of IEC 61643 is applicable to gas discharge tubes (GDT) used for overvoltage
protection in telecommunications, signalling and low-voltage power distribution networks with
nominal system voltages up to 1 000 V (r.m.s.) a.c. and 1 500 V d.c..They are defined as a
gap, or several gaps with two or three metal electrodes hermetically sealed so that gas
mixture and pressure are under control. They are designed to protect apparatus or personnel,
or both, from high transient voltages. This standard contains a series of test criteria, test
methods and test circuits for determining the electrical characteristics of GDTs having two or
three electrodes. This standard does not specify requirements applicable to complete surge
protective devices, nor does it specify total requirements for GDTs employed within electronic
devices, where precise coordination between GDT performance and surge protective device
withstand capability is highly critical.
This part of IEC 61643
– does not deal with mountings and their effect on GDT characteristics. Characteristics
given apply solely to GDTs mounted in the ways described for the tests;
– does not deal with mechanical dimensions;
– does not deal with quality assurance requirements;
– may not be sufficient for GDTs used on high-frequency (>30 MHz);
– does not deal with electrostatic voltages;
– does not deal with hybrid overvoltage protection components or composite GDT devices.
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