Shunt Capacitors for a.c. Power Systems Having a Rated Voltage Above 1 000 v - Part 3 : Protection of Shunt Capacitors and Shunt Capacitor Banks

This document specifies the protection requirements for shunt capacitors and shunt capacitor banks used in alternating current power systems with a rated voltage exceeding 1000V. It covers the design, performance, and testing of protective devices intended to safeguard the capacitors against overvoltage, overcurrent, and other abnormal conditions. The standard outlines the general principles for the selection and application of protection systems, including fuses, circuit breakers, and relays. It also addresses the coordination between different protection devices to ensure effective operation under various fault scenarios. The scope includes both individual capacitors and groups of capacitors connected in parallel. The requirements are applicable to the installation, commissioning, and maintenance of protection systems in power systems where capacitors are used for power factor correction and voltage regulation. The standard provides technical guidelines to ensure the reliability and safety of electrical installations incorporating shunt capacitors.