Circuit breakers including _____________ and metal-clad breakers can interrupt fault current and lock out on a permanent fault.

Circuit breakers including _____________ and metal-clad breakers can interrupt fault current and lock out on a permanent fault.

• A. Cutouts
• B. Gang switches
• C. Switchgear
• D. Distribution reclosers

Answer: (D)

Distribution reclosers are protective devices on distribution feeders that can interrupt fault current and then automatically reclose to restore service if the fault is temporary. If the fault persists, they will lock out and stay open, isolating the fault. That combination—interrupting a fault, attempting reclosure, and then locking out on a permanent fault—is what makes distribution reclosers match the behavior described. Other devices like fuses (cutouts) only interrupt and must be replaced to restore service, manual switches lack automatic reclosing, and general switchgear doesn’t inherently include the auto-reclosing/lockout sequence.

Distribution reclosers are protective devices on distribution feeders that can interrupt fault current and then automatically reclose to restore service if the fault is temporary. If the fault persists, they will lock out and stay open, isolating the fault. That combination—interrupting a fault, attempting reclosure, and then locking out on a permanent fault—is what makes distribution reclosers match the behavior described. Other devices like fuses (cutouts) only interrupt and must be replaced to restore service, manual switches lack automatic reclosing, and general switchgear doesn’t inherently include the auto-reclosing/lockout sequence.