Bus Coupler

Description
1. An isolator (or a combination of two isolators and a circuit breaker) provising a no-load (or load-breaking) switching point between two parallel sets of busbars. The centre circuit breaker in a 1 1/2 circuit breaker (CB) switch bay is commonly called the 'coupler' CB, as it remotely links the two parallel busbars.

Synonyms
Bus Tie