Electronic trip unit and mounting method
AssigneeSiemens Energy & Automation, Inc.
InventorsSolomon R. Titus, Mario Bilac
Life of this patent
Estimating the term…
Abstract
An electronic trip unit is adapted for connection to a circuit breaker for circuit interruptions. The electronic trip unit includes a frame module shaped to define a recess. An electronics module is releasably connected to the frame module. The electronics module has a housing, a circuit board assembly, and a facing surface providing access for adjustment of the electronics module. The housing of the electronics module is sized and shaped to fit at least partially within the recess defined by the frame module. An engagement surface is positioned for releasable engagement between the frame module and the electronics module in order to permit removal and replacement of the electronics module with respect to the frame module.
Claims21
An electronic trip unit adapted for connection to a circuit breaker for circuit interruption, said electronic trip unit comprising:
- a frame module shaped to define a recess;
- an electronics module releasably engaged to said frame module, said electronics module having a housing to define an interior space, a circuit board assembly mounted within said interior space, and a facing surface providing access for adjustment of said electronics module, said housing of said electronics module fitting at least partially within said recess defined by said frame module;
- and
- an engagement surface positioned for releasable engagement between said frame module and said electronics module, wherein said engagement surface releasably engages said electronics module to said frame module and permits removal and replacement of said electronics module with respect to said frame module.
An electronic trip unit adapted for connection to a circuit breaker for circuit interruption, said electronic trip unit comprising:
- a frame module shaped to define a recess;
- an electronics module releasably connected to said frame module, said electronics module having a housing shaped to define an interior space, a circuit board assembly mounted within said interior space, and a facing surface providing access for adjustment of said electronics module, said housing fitting at least partially within said recess defined by said frame module, wherein said housing of said electronics module comprises mating housing components and a face plate which together at least partially define said interior space,
- an engagement surface positioned for releasable engagement between said frame module and said electronics module, wherein said engagement surface releasably engages said electronics module to said frame module and permits removal and replacement of said electronics module with respect to said frame module.
A circuit breaker comprising:
- a breaker frame;
- a frame module releasably engaged to said breaker frame, said frame module enclosing at least one transformer positioned between a line side bus and a load side bus, said frame module being shaped to define a recess extending inwardly from an outer surface of said frame module;
- an electronics module releasably connected to said frame module and to said transformer, said electronics module having a housing shaped to define an interior space, a circuit board assembly mounted within said interior space, and a facing surface providing access for adjustment of said electronics module, said housing fitting shaped at least partially within said recess defined by said frame module, wherein said housing of said electronics module comprises mating housing components and a face plate which together at least partially define said interior space, and wherein said housing comprises an interior surface defining a guide for positioning said circuit board assembly;
- and
- a bracket connected to said electronics module or said frame module, said bracket being positioned for releasable engagement between said frame module and said electronics module, wherein said bracket releasably engages said electronics module to said frame module and permits removal and replacement of said electronic module with respect to said frame module.
Dependencies are inferred from the claim text.