Posts tagged as circuit breaker

Breaker coordination: what you really need to know

  Selective coordination is an electrical system design practice that improves reliability. Breaker coordination methodology increases uptime by limiting power outages to the branch of an electrical system where a problem occurs without knocking out other areas of the system. When a fault happens, the closest overcurrent protective device opens either a breaker or a […]

Safety and portability in circuit breaker testing

  A high voltage circuit breaker is the most important component of a HV substation as it has the crucial task of removing the fault, no matter what the fault current is. Even a nominal current could be difficult to open as 2000 A on a 380 kV line would equate to approximately 500 MW […]

Applying vacuum switchgear at transmission voltages

  Vacuum switchgear has been in extensive use in distribution systems for 30 years for the making and breaking of (fault) current and the switching of loads of all possible nature. The reliability and performance records of the vacuum switching technology are outstanding in the medium voltage range (up to 52 kV), having led to […]