| US 7,544,908 B2 | ||
| Circuit breaker cradle with an interlock system and a method of using the same | ||
| John C. Webb, Florence, S.C. (US); and Murray K. Jones, Johnsonville, S.C. (US) | ||
| Assigned to ABB Technology AG, Zurich (Switzerland) | ||
| Filed on Jun. 23, 2008, as Appl. No. 12/144,594. | ||
| Claims priority of provisional application 60/946320, filed on Jun. 26, 2007. | ||
| Prior Publication US 2009/0000925 A1, Jan. 01, 2009 | ||
| Int. Cl. H01H 9/20 (2006.01); H01H 9/24 (2006.01) | ||
| U.S. Cl. 200—50.24 [200/50.27; 361/608] | 18 Claims |
| 1. A cradle for adapting a circuit breaker for mounting in a cell of a switchgear cabinet having a bus bar system, the cradle
comprising:
a frame for holding the circuit breaker, the frame including a bottom structure and a pair of opposing side structures that
help define a holding space for receiving the circuit breaker;
a racking apparatus mounted to the frame, the racking apparatus being operable to move the cradle between a first position,
wherein the cradle is not electrically connected to the bus bar system, and a second position, wherein the cradle is electrically
connected to the bus bar system; and
a locking apparatus mounted to the frame, the locking apparatus having first and second operating states, wherein when the
locking apparatus is in the first operating state, the locking apparatus prevents the circuit breaker from being disposed
in the holding space of the frame and allows the racking apparatus to move the cradle between the first and second positions,
and when the locking apparatus is in the second operating state, the locking apparatus allows the circuit breaker to be disposed
in the holding space of the frame and prevents the racking apparatus from moving the cradle between the first and second positions.
|