Interlock for circuit interrupting device
AssigneeG & W Electric Company
InventorsKennedy Amoako Darko, Donald Richard Martin
Life of this patent
Estimating the term…
Abstract
A circuit-interrupting device includes a load-breaker operable between an open state and a closed state and a first interlock member operatively associated with the load-breaker. The first interlock member moves between a first position and a second position when the load-breaker moves between the closed state and the open state. The circuit-interrupting device further includes a disconnect switch that moves between an open state and a closed state. When the load-breaker is in the closed state, the first interlock member is in the first position and contacts the disconnect switch to prevent the disconnect switch from moving from the closed state to the open state.
Claims20
A circuit-interrupting device comprising:
- a load-breaker operable between a load-breaker open state and a load-breaker closed state;
- a first interlock member operatively associated with the load-breaker, wherein the first interlock member moves between a first position and a second position when the load-breaker moves between the load-breaker closed state and the load-breaker open state;
- and
- a disconnect switch that moves between a disconnect switch open state and a disconnect switch closed state,
- wherein when the load-breaker is in the load-breaker closed state, the first interlock member is in the first position relative to the disconnect switch to prevent the disconnect switch from moving from the disconnect switch closed state to the disconnect switch open state.
An interlock system for a circuit-interrupting device, the circuit interrupting device including a load-breaker operable between a load-breaker open state and a load-breaker closed state and a disconnect switch in series with the load-breaker and having a blade movable between a blade open state and a blade closed state, the interlock system comprising:
- a first interlock member operably associated with the load-breaker, the first interlock member having a first interlock state when the load-breaker is in the load-breaker closed state and a second interlock state when the load-breaker is in the load-breaker open state, wherein the first interlock member moves from the first interlock state to the second interlock state when the load-breaker moves to the load-breaker open state,
- wherein, when the first interlock member is in the first interlock state, the first interlock member is positioned to prevent the disconnect switch blade from moving from the blade closed state to the blade open state.
A circuit-interrupting device comprising:
- a load-breaker including a first contact and a second contact, wherein the second contact is movable relative to the first contact between a load-breaker closed state and a load-breaker open state;
- a first operating mechanism for moving the second contact between the load-breaker closed state and the load-breaker open state;
- a first actuating assembly for controlling movement of the first operating mechanism;
- a disconnect switch having a blade pivotable between a disconnect switch closed state and a disconnect switch open state;
- a second operating mechanism for moving the disconnect switch blade between the disconnect switch closed state and the disconnect switch open state;
- a second actuating assembly for controlling movement of the second operating mechanism;
- and
- a first interlock member coupled to the load-breaker for concurrent travel therewith to prevent, independently of the second actuating assembly, the disconnect switch blade from pivoting from the disconnect switch closed state to the disconnect switch open state when the second contact is in the load-breaker closed state.
Dependencies are inferred from the claim text.