This guide applies to the protection of shunt power capacitor and filter banks. Included are guidelines for reliable applications of protection methods intended for use in many shunt capacitor applications and designs. The guide does not include a discussion of pole-mounted capacitor banks on distribution circuits or application of capacitors connected to rotating apparatus. This guide has been prepared to assist in the application of relays and other devices for the protection of shunt capacitor banks used in substations. It covers methods of protection for many commonly used shunt capacitor bank configurations. Capacitor bank design trade-offs are also discussed because bank design influences the protection. Additionally, this guide covers the protection of filter banks and large extra-high voltage (EHV) shunt capacitor banks. Revision Standard - Superseded. The protection of shunt power capacitor and filter banks are covered. Guidelines forreliable applications of protection methods intended for use in many shunt capacitor applicationsand designs are included. The protection of pole-mounted capacitor banks on distribution circuitsand the application of capacitors connected directly to routing apparatus are not included.