Primary circuit breaker
AssigneeRTE Corporation
InventorsEdwin A. Link, Harvey W. Mikulecky
Life of this patent
Estimating the term…
Abstract
A primary circuit breaker for fluid filled transformers, the circuit breaker being immersible in the fluid in the transformer and including a circuit interrupter assembly, an externally actuatable latch mechanism for reclosing the interrupter assembly and a magnetically controlled trip assembly for releasing the interrupter assembly from the latch mechanism in response to predetermined electrical and thermal conditions in the transformer.
Claims16
In a fluid distribution transformer, a circuit breaker connected in series with the primary winding of the transformer and adapted to be immersed in the transformer dielectric fluid, said breaker including a frame, a housing mounted on said frame and including a fixed contact, a movable contact mounted on said frame for movement into said housing to engage said fixed contact, first means for biasing said movable contact away from said fixed contact, second means for biasing said movable contact toward said fixed contact, latch means connecting said second biasing means to said first biasing means whereby said contact is held in engagement with said fixed contact by said second biasing means and temperature controlled trip means mounted on said frame in a position to disengage said latch means from said first biasing means when predetermined electrical and temperature conditions exist in the transformer whereby said first biasing means will be released from said second biasing means allowing said first biasing means to move the movable contact away from the fixed contact to open the circuit breaker.
A primary circuit breaker comprising a base,
- a first fixed contact and a second movable contact mounted on said base,
- means for moving said second contact into and out of engagement with said first contact,
- means connected to said moving means for biasing said second contact away from said first contact,
- manually actuatable means for selectively biasing said second contact into and out of engagement with said first contact,
- latch means for connecting said manually actuatable means to said moving means,
- heat responsive means mounted on said base for tripping said latch means to release said moving means from said manually actuatable means,
- said heat responsive means being responsive to primary and secondary load conditions whereby said second contact will be disengaged from said first contact when the predetermined conditions are present.
A fluid immersible primary circuit breaker responsive to fault and overload conditions in a fluid filled electrical apparatus, said breaker comprising
- a frame adapted to be mounted in the fluid in the apparatus,
- a first contact mounted on said frame,
- a second contact mounted for movement into and out of engagement with said first contact,
- first means biasing said second contact away from said first contact, second biasing means manually movable between a first position for biasing said second contact into engagement with said first contact and a second position for biasing said second contact away from said first contact,
- means operably connecting said second biasing means to said first biasing means whereby said second contact responds to the position of said second biasing means,
- temperature responsive trip means for releasing said connecting means from said first biasing means in response to fault or overload conditions whereby said first biasing means will move said second contact away from said first contact.
Dependencies are inferred from the claim text.