Single busbar protection device

Abstract

The invention relates to electrical engineering and can be used as a device for protecting a single busbar system from short circuits. The technical result of the invention is the disconnection of busbar circuit breakers, preventing power loss to consumers in the event of a failure of the busbar protection output relay. A protection device for a single busbar system with switches connected to it contains: a measuring element and an output element connected to it with normally open contacts connected to the trip coils of the busbar switches, a two-input AND element with an inverse input, two “Time” elements connected to the output of this element, the first and second intermediate relays connected, respectively, to the first and second time relays. Economic effect: damage from loss of power supply to all consumers of connections connected to the busbars is prevented.