Components for low-voltage surge protective devices - Selection and application principles for gas discharge tubes Ingestion-build-228203 Various performance and marking requirements

Various performance and marking requirements have been made clearer

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They are designated by B

storage and maintenance

making them therefore extremely difficult to quantify and even in some cases to detect

Components for low-voltage surge protective devices - Selection and application principles for gas discharge tubes Ingestion-build-228203 Various performance and marking requirements1 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