Molded case circuit breakers with a switch PCB over an internal pocket and behind a front cover

Patent metadata

Field	Value
Publication number	US-9524842-B2
Application number	US-201514659247-A
Country	US
Kind code	B2
Filing date	Mar 16, 2015
Priority date	Dec 19, 2014
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

Molded case circuit breakers (MCCBs) have an MCCB body with at least one switch printed circuit board (PCB) holding between 1-4 recessed switches. The switch PCB has a bottom primary surface and an opposing top primary surface and a cover residing over the switch PCB and attached to the MCCB case body so that an outer end portion of the 1-4 switches held by the switch PCB extends through the cover.

First claim

That which is claimed is:

1. A molded case circuit breaker (MCCB), comprising:
an MCCB body with at least one internal pocket with four sidewalls;
a switch printed circuit board (PCB) holding at least one recessed switch, the switch PCB residing over a top of the at least one internal pocket, wherein the switch PCB has a bottom primary surface and an opposing top primary surface;
a cover residing over the switch PCB attached to the MCCB case body so that an outer end portion of the at least one switch held by the switch PCB extends to be flush with or extends through the cover, wherein the cover has a perimeter with first and second rectangular panel segments connected by a laterally extending segment having a height that is less than a height of the first and second rectangular segments, wherein the laterally extending segment resides under an open window space of the cover bounded by inner perimeter segments of the first and second rectangular panel segments and the breaker handle extends outward through the window, and wherein the switch PCB resides under the first or second rectangular panel segment; and
a planar accessory mounting surface in a lower region of the at least one internal pocket, wherein the cover has at least one left side and/or right side corner segment that extends inward a distance to define a left and/or right outer wall of a cavity, adjacent an inner front surface of the cover, wherein the switch PCB resides entirely in the cavity, wherein a headspace extends under the bottom primary surface of the switch PCB in the cavity of the cover, and wherein a distance to the accessory mounting surface measured from the bottom primary surface of the switch PCB has a length D 2 that is about 1.050 inches.

2. The MCCB of claim 1 , wherein the cover has an outer surface that is closely spaced apart from the switch PCB bottom primary surface by a distance D 1 that is about 0.157 inches.

3. The MCCB of claim 1 , wherein the at least one switch has a plurality of outwardly extending legs that are electrically attached to the bottom primary surface of the switch PCB.

4. The MCCB of claim 1 , further comprising an accessory held in at least one of the at least one pocket with a lower surface of the accessory held against an accessory mounting surface in the at least one pocket and an electrical insulator residing between the accessory and the switch PCB.

5. The MCCB of claim 4 , wherein the accessory is one of an under voltage release, a shunt, an auxiliary switch or a bell alarm accessory.

6. A molded case circuit breaker (MCCB), comprising:
an MCCB body with at least one internal pocket with four sidewalls;
at least one switch printed circuit board (PCB) holding at least one recessed switch, the switch PCB residing over a top of the at least one internal pocket, wherein the switch PCB has a bottom primary surface and an opposing top primary surface; and
a cover residing over the switch PCB attached to the MCCB case body so that an outer end portion of the at least one switch held by the switch PCB extends to be flush with or extends through the cover,
wherein the at least one switch PCB is a first switch PCB and a second switch PCB, wherein the at least one pocket comprises first and second pockets residing on opposing sides of a breaker handle, wherein the cover extends across both the first and second pockets and has an intermediate window for the breaker handle, wherein the cover has switch visual indicia about a plurality of switch apertures, and wherein the at least one switch is a plurality of switches held recessed on respective first and second switch PCBs, the first switch PCB held over the first pocket and the second switch PCB held over the second pocket, both residing under and adjacent to the cover, the switches having an outwardly extending length sufficient to extend at least partially into or through the switch apertures in the cover to position outer ends of the switches flush with or outside the cover.

7. The MCCB of claim 1 , wherein the MCCB is in a range of between 100V-600 V MCCB and comprises a respective 100 V-600 V insulating member residing under the bottom of the switch PCB above one of the at least one pocket.

8. A molded case circuit breaker (MCCB), comprising:
an MCCB body;
at least one switch printed circuit board (PCB) holding between 1-4 recessed switches, wherein the switch PCB has a bottom primary surface and an opposing top primary surface; and
a cover residing over the switch PCB and attached to the MCCB case body so that outer end portions of the 1-4 recessed switches extend outward through the cover,
wherein the cover has an outer surface with switch apertures sized and configured to allow the outer end portions of the recessed switches to extend at least partially into or totally therethrough that is closely spaced apart from the switch PCB bottom primary surface by a distance D 1 that is about 0.157 inches, and wherein the MCCB body defines first and second spaced apart internal accessory pockets, each having a respective four molded sidewalls, one accessory pocket on each side of a breaker handle, and wherein the at least one switch PCB includes first and second switch PCBs, the first switch PCB above the first accessory pocket and the second switch PCB above the second accessory pocket.

9. The MCCB of claim 8 , wherein the cover has left and right corner segments that each step down in an inward direction from a front of the cover to define a respective left side wall of a left side internal cavity and a right side wall of a right side internal cavity, both under a front inner surface of the cover, the right side cavity residing above the first accessory pocket of the MCCB body and the left side cavity residing above the second accessory pocket of the MCCB body, and wherein the bottom primary surfaces of respective switch PCBs reside a distance above a lower inwardly facing end of a corresponding left and right side wall, and wherein the cover comprises respective headspaces in the right and left side cavities of about 0.04 inches measured from the bottom primary surface of a respective switch PCB to a plane drawn across a corresponding lower inwardly facing end of the right and left side walls of the right and left corner segments.

10. The MCCB of claim 9 , wherein each of the 1-4 switches have a plurality of outwardly extending legs that are electrically attached to the bottom primary surface of a respective switch PCB.

11. The MCCB of Claim 8 , further comprising a planar accessory mounting surface in a lower region of the first and second accessory pockets, wherein a distance between the accessory mounting surface and the bottom primary surface of the switch PCB has a length D 2 that is about 1.050 inches.

12. The MCCB of Claim 8 , further comprising an accessory held at least one of the first and second accessory pockets against an accessory mounting surface and an electrical insulator residing between the accessory and the switch PCB.

13. The MCCB of claim 12 , wherein the accessory is an under voltage release, a shunt, an auxiliary switch or a bell alarm accessory.

14. The MCCB of claim 8 , wherein the cover extends across both the first and second accessory pockets and has an intermediate window for the breaker handle, wherein the cover has switch visual indicia about a plurality of switch apertures.

15. The MCCB of claim 8 , wherein the MCCB is an MCCB in a range of 100 V 1500 V MCCB and comprises first and second appropriately rated insulating members residing under the bottom of a respective first and second switch PCB above corresponding first and second

Assignees

• Eaton Corp

Inventors

• Sisley James Patrick
• Lagree James Leo
• Malingowski Richard Paul
• Miller Theodore James
• Olenak David Richard

Classifications

• H01H71/0228 Primary

  having provisions for interchangeable or replaceable parts · CPC title

• H01H2071/086

  Low power connections for auxiliary switches, e.g. shunt trip · CPC title

• H01H71/025

  Constructional details of housings or casings not concerning the mounting or assembly of the different internal parts · CPC title

• H01H71/1045 Primary

  Multiple circuits-breaker, e.g. for the purpose of dividing current or potential drop · CPC title

• H01H71/04

  Means for indicating condition of the switching device {(by means of an auxiliary contact H01H71/46)} · CPC title