Interlocking of Circuit Breakers with Toggle Control

Interlocking involves padlocking the toggle handles on two devices which may be either circuit breakers or automatic switches.

Authorized positions:

  • one device closed (ON), the other open (OFF)

  • both devices open (OFF).

The system is locked using up to three padlocks (shackle diameter 3/16–5/16 in. [5 to 8 mm]).

The devices must be unit mount construction, circuit breakers can be mounted via backpan mount or DIN rail. Interlocking is not available for I-Line constructions.

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