BS EN 62271-112 is a part of the IEC 62271 series that applies to a.c. high-speed earthing switches designed for indoor and outdoor installation and for operation at service frequencies of 50 Hz and 60 Hz on systems having voltages of 550 kV and above.
High-speed earthing switches described in BS EN 62271-112 are intended to extinguish the secondary arc remaining after clearing faults on transmission lines by the circuit-breakers.
BS EN 62271-112 on high voltage switchgear and controlgear is useful for:
A gas-insulated switchgear's (GIS) high-speed earthing switch (HSES) has a secondary role in protecting the power system in the case of an accident. The leftover short-circuits current in the network should be earthed by the HSES after being halted by a circuit breaker (CB). This assures the safety of maintenance staff during normal checks and maintenance.
BS EN 62271-112 provides its users with guidelines for the design and construction and addresses the rules for transport, storage, installation, operation, and maintenance. BS EN 62271-112 states the information to be given with enquiries, tenders, and orders to the end-users. Using BS EN 62271-112 guidelines enhances the electric power transmission and ensures safety and protection and high-quality electrical equipment for high voltage usage.
EN 62271-112:2013
IEC 62271-112:2013