Reasonable Selection of Internal Fault Protection for Single Capacitor

The reasonable selection of internal fault protection for capacitor is the important means to improve operation reliability of capacitor installation. The fault expansion of capacitor bank occurred frequently because of unreasonable selection and disposition of internal fault protection for single capacitor, which was not good for the safe operation of capacitor bank. The paper introduced the selection principle of external fuse under the breaking modes of little current and big current, the principle of internal fuse protection and the selection principle of number of shunt element for internal fuse capacitor, and took the disposition of capacitor with internal fuse or external fuse as an example.