In multi-pole electronic circuit breakers preventing breaker armature from latching with cradle if certain criteria are met

Patent metadata

Field	Value
Publication number	US-10665411-B2
Application number	US-201715718413-A
Country	US
Kind code	B2
Filing date	Sep 28, 2017
Priority date	Sep 28, 2017
Publication date	May 26, 2020
Grant date	May 26, 2020

Abstract

A multi-pole circuit breaker such as a residential electronic circuit breaker is provided. It includes a means to prevent a breaker mechanism from latching, i.e., a breaker armature from latching with a cradle if certain criterion is met. In particular, the multi-pole circuit breaker comprises a breaker mechanism including a breaker armature, a cradle and an armature latch bar to prevent the breaker armature from latching with the cradle. The armature latch bar includes a recessed feature that interfaces with the breaker armature, an armature latching surface that needs to be removed before the breaker mechanism can be latched and an armature latching lever that prevents a rotation of the breaker armature.

First claim

What is claimed is:

1. A multi-pole circuit breaker comprising:
a breaker mechanism including a breaker armature;
a cradle; and
an armature latch bar to prevent the breaker armature from latching with the cradle, wherein the armature latch bar includes:
a recessed feature that interfaces with the breaker armature,
an armature latching surface that needs to be removed before the breaker mechanism can be latched, and
an armature latching lever that prevents a rotation of the breaker armature.

2. The multi-pole circuit breaker of claim 1 , further comprising:
a breaker trip bar that includes a recessed area to interface with the armature latch bar.

3. The multi-pole circuit breaker of claim 2 , wherein the breaker trip bar includes a surface to rotate the armature latch bar clockwise during a trip event.

4. The multi-pole circuit breaker of claim 2 , wherein the breaker trip bar includes a feature to activate a printed circuit board (PCB) switch.

5. The multi-pole circuit breaker of claim 1 , further comprising:
a printed circuit board (PCB) assembly including an electronic circuitry to activate at least one of a solenoid assembly and an electromagnet.

6. The multi-pole circuit breaker of claim 5 , wherein the printed circuit board (PCB) assembly includes an outer perimeter that is nested within a surrounding plastic geometry.

7. The multi-pole circuit breaker of claim 1 , further comprising:
a breaker trip bar that includes a recessed area to interface with the armature latch bar; and
a solenoid assembly that is activated when the breaker trip bar is rotated to a maximum rotation.

8. The multi-pole circuit breaker of claim 7 , wherein the solenoid assembly includes:
a plunger with a smaller radius to engage with a surface of the armature latch bar.

9. The multi-pole circuit breaker of claim 1 , further comprising:
a right pole (RP) assembly including a right pole (RP) base and a right pole (RP) cover, wherein the RP cover includes recessed areas to accommodate one or more printed circuit board (PCB) components.

10. The multi-pole circuit breaker of claim 1 , further comprising:
a left pole (LP) assembly including a left pole (LP) base and a left pole (LP) cover, wherein the LP base includes recessed areas to accommodate a printed circuit board (PCB) assembly and a wire routing.

11. The multi-pole circuit breaker of claim 10 , wherein the left pole (LP) base includes a first recessed area for the wire routing that is connected from a line terminal and to a printed circuit board (PCB) assembly.

12. The multi-pole circuit breaker of claim 11 , wherein the left pole (LP) base includes a second recessed area to capture the PCB assembly.

13. The multi-pole circuit breaker of claim 10 , wherein the left pole (LP) base includes a plurality of stops to prevent the armature latch bar rotation clockwise and/or counterclockwise.

14. The multi-pole circuit breaker of claim 1 , further comprising:
a right pole (RP) base and a left pole (LP) cover that include a set of journals for a set of armature latch bar posts to rotate about a specific point.

15. The multi-pole circuit breaker of claim 1 , further comprising:
a printed circuit board (PCB) switch that is activated when a breaker trip bar feature is rotated to a maximum rotation.

16. The multi-pole circuit breaker of claim 1 , wherein the printed circuit board (PCB) switch is momentarily activated during rotation of the cradle when a breaker handle is rotated towards a reset position.

17. A ground fault circuit interrupter (GFCI) and/or a combination arc-fault circuit interrupting (CAFCI) two or three pole residential circuit breaker comprising:
a breaker mechanism including a breaker armature;
a cradle;
an armature latch bar to prevent the breaker armature from latching with the cradle, wherein the armature latch bar includes:
a recessed feature that interfaces with the breaker armature,
an armature latching surface that needs to be removed before the breaker mechanism can be latched, and
an armature latching lever that prevents a rotation of the breaker armature;

a breaker trip bar that includes a recessed area to interface with the armature latch bar; and
a printed circuit board (PCB) assembly including an electronic circuitry to activate at least one of a solenoid assembly and an electromagnet.

18. The ground fault circuit interrupter (GFCI) and/or combination arc-fault circuit interrupting (CAFCI) two or three pole residential circuit breaker of claim 17 , wherein the breaker trip bar includes a surface to rotate the armature latch bar clockwise during a trip event.

19. The ground fault circuit interrupter (GFCI) and/or combination arc-fault circuit interrupting (CAFCI) two or three pole residential circuit breaker of claim 17 , wherein the breaker trip bar includes a feature to activate a printed circuit board (PCB) switch.

20. The ground fault circuit interrupter (GFCI) and/or combination arc-fault circuit interrupting (CAFCI) two or three pole residential circuit breaker of claim 18 , wherein the solenoid assembly includes a plunger with a smaller radius to engage with a surface of the armature latch bar.

Assignees

• Siemens Industry Inc

Inventors

• Watford Russell Thomas

Classifications

• H01H71/2463 Primary

  with plunger type armatures · CPC title

• H01H2083/201

  the other abnormal electrical condition being an arc fault · CPC title

• H01H71/62

  with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement · CPC title

• H01H83/22

  the other condition being imbalance of two or more currents or voltages · CPC title

• H01H9/54

  Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere · CPC title