Switchgear Safety: Racking In/Out Procedures
TL;DR Switchgear racking is the controlled insertion (racking in) or withdrawal (racking out) of a draw-out circuit breaker between its connected, test, and disconnected positions. Because the moving primary contacts engage live busbars, racking carries a high arc flash risk. The safest approach is to rack the breaker de-energized, or remotely from outside the arc … Read more