A cable interlock actuated by a plunger extended from the back of a draw-out circuit breaker when the breaker is closed, prevents closure of a second circuit breaker by holding it in the trip condition. A shutter which closes to prevent access to power system terminations at the rear of the draw-out circuit breaker enclosure when the breaker is removed, blocks operation of the interlock to prevent tripping of the other circuit breaker.
Anthony J. Fishovitz - Freedom PA Thomas K. Fogle - Pittsburgh PA
Assignee:
Eaton Corporation - Cleveland OH
International Classification:
G08B 2100
US Classification:
340638
Abstract:
A bell alarm system is provided for a circuit breaker in which the actuation of a flux shift trip device causes an electrical switch to be energized thus providing a bell alarm indication that the circuit breaker has been tripped. The flux trip device impinges against a pivotally rotated lower lever mechanism which has a knee which causes rotation of an upper lever against the influence of a spring attached between the two levers. As the knee moves along a surface of the upper lever mechanism, the relative rotation of the two lever members about their support pins is such as to cause the tension on the spring to increase. Because of this vibration in the circuit breaker itself or minute low level movements of the plunger mechanism will not cause the bell alarm to be actuated. The bell alarm will not be actuated until the aforementioned lower knee has rotated sufficiently far along the previously described surface to clear an upper knee in the upper lever mechanism thus allowing the force of the spring to cause the upper lever to actuate the bell alarm.
- Cleveland OH, US JAMES ALAN TRAX - OAKDALE PA, US JASON ERIC BASTA - OAKDALE PA, US DOEL COLLAZO - MCDONALD PA, US ANTHONY JOHN FISHOVITZ - FREEDOM PA, US
Assignee:
EATON CORPORATION - CLEVELAND OH
International Classification:
H01H 33/08
US Classification:
218149, 218157
Abstract:
An arc baffle includes a first baffle member having a number of first venting holes disposed therein, each being structured to receive ionized gases produced by an arcing event; a second baffle member having a number of second venting holes disposed therein; a section of porous material disposed between the first baffle member and the second baffle member; and a cover disposed adjacent the second baffle member on the opposite side of the section of porous material. The first venting holes are laterally spaced from the second venting holes by a predetermined distance such that ionized gases produced by the arcing event passing through one of the first venting holes must travel at minimum the predetermined distance generally along the section of porous material before passing through one of the second venting holes.