DIN EN 61643-11:2013-04

This standard describes safety and performance tests for surge protective devices (SPDs). There are three classes of tests: - The Class I test simulates partial conducted lightning current impulses. - SPDs subjected to Class I test methods are generally recommended for locations at points of high exposure, for example, line entrances to buildings protected by lightning protection systems. - SPDs tested to Class II or III test methods are subjected to impulses of shorter duration. SPDs are tested on a "black box" basis as far as possible. IEC 61643-12 describes the selection and application principles of SPDs in practical situations. This part of EN 61643 is applicable to devices for surge protection against indirect and direct effects of lightning or other transient overvoltages. These devices are packaged to be connected to 50 Hz a.c. power circuits, and equipment rated up to 1 000 V r.m.s. Performance characteristics, safety requirements, standard methods for testing and ratings are specified. These devices contain at least one nonlinear component and are intended to limit surge voltages and divert surge currents. The responsible committee is Subcommittee UK 441.1 "Starkstromkabel" ("Power cables") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.