IEC 61643-312:2013 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
DS/EN 61643-312:2013 history
2013DS/EN 61643-312:2013 Components for low-voltage surge protective devices - Part 312: Selection and application principles for gas discharge tubes