DIN EN 60143-2:2025-11

This document covers protective equipment for series capacitor banks, with a size larger than 10 Mvar per phase. Protective equipment is defined as the main circuit apparatus and ancillary equipment, which are part of a series capacitor installation, but which are external to the capacitor part itself. The recommendations for the capacitor part are given in IEC 60143-1:2004. The protective equipment is mentioned in Clause 3 and 10.6 of IEC 60143-1:2004. The protective devices covered by this standard include: - overvoltage protection devices; - protective spark gaps; - varistors (nonlinear resistor); - bypass switches; - isolating switches and grounding switches; - discharge current-limiting devices and attenuation devices; - voltage transformers; - current sensors; - coupling capacitors; - indicating towers; - fibre optic connections of the framework; - relay protection; control devices; and transmission devices between the framework and ground. The purpose of this standard is to specify uniform rules with regard to performance, testing, and design. In addition, various types of overvoltage protection devices are described, and guidelines for construction and operation are provided.