The Application of Fixed Circuit Breaker and ATS in 380V Equipment in Substation

Abstract

In recent years, a new type of 380V low voltage fixed circuit breakers are used in newly built substations. Fixed circuit breakers without chassis only have two states. They are on and off. They can not provide a clear break point in circuit. So Their isolation function is not obviously. Low voltage equipment in Hub substations should have automatic mutual transfer function. Recently Automatic Transfer Switch (ATS) is often chosen in the newly built digital substation, intelligent substation or large hub substations. Automatic Transfer Switch has interlocking function to avoid the collision of two different power. With the popularize of new equipment such as the 380V fixed circuit breaker and Automatic Transfer Switch, the operation and management of low-voltage equipment in substations puts forward higher requirements as well. The conclusion contains the better ways in operation and maintenance of these new low-voltage equipment.