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1. (WO2018044480) MONITORING AND RESPONDING TO AN ABNORMAL CONDITION ASSOCIATED WITH ENERGIZING OF POLES OF A CIRCUIT BREAKER
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What is claimed is:

1. A multi-pole circuit interrupter (5) configured to be coupled between an AC source (15) and an electric load (20), the multi-pole circuit interrupter (5) comprising:

a tie bar (205) mechanically coupling a first handle (315a) of a first pole circuit interrupter (310a) of the multi-pole circuit interrupter (5) to a second handle (315b) of a second pole circuit interrupter (310b) of the multi-pole circuit interrupter (5) so that both poles turn on and off together;

a trip bar (410) mechanically coupling a first trip arm (415a) of the first pole circuit interrupter (310a) to a second trip arm (415b) of the second pole circuit interrupter (310b) so that the both poles trip off together should one of the first pole circuit interrupter (310a) or the second pole circuit interrupter (310b) trip due to an over current condition;

a first switch (25) to energize a first pole (30) on a phase A conductor (35) of the multi-pole circuit interrupter (5);

a second switch (40) to energize a second pole (45) on a phase B conductor (50) of the multi-pole circuit interrupter (5); and

an electronic solid-state circuit (10) coupled to the phase A conductor (35) and the phase B conductor (50) to detect a line voltage variation and control a current to a device (900) in response to trip an energized pole among the first pole (30) and the second pole (45) if only one of the first pole (30) and the second pole (45) is energized when a user controls the tie bar (205) to turn on or turn off the multi-pole circuit interrupter (5) or when the trip bar (410) fails to trip one of the first pole (30) and the second pole (45).

2. The multi-pole circuit interrupter (5) of claim 1, wherein the electronic solid-state circuit (10) further comprising:

a line voltage detection circuit (1100) disposed on a load side of the first switch (25) and the second switch (40), the line voltage detection circuit (1100) is configured to detect a change in a voltage level of the phase A conductor (35) and a change in a voltage level of the phase B conductor (50).

3. The multi-pole circuit interrupter (5) of claim 2, wherein the line voltage detection circuit (1100) is a resistor bridge (1200) that provides an output voltage based on the voltage level of the phase A conductor (35) and the voltage level of the phase B conductor (50).

4. The multi-pole circuit interrupter (5) of claim 2, wherein the resistor bridge (1200) includes first (1205a), second (1205b), third resistors (1205c) of equal value.

5. The multi-pole circuit interrupter (5) of claim 2, wherein the electronic solid-state circuit (10) further comprising:

a trip solenoid (1115) disposed adjacent to the first switch (25) and the second switch (40), the trip solenoid (1115) having a first terminal (1120) and a second terminal (1125).

6. The multi-pole circuit interrupter (5) of claim 5, wherein the electronic solid-state circuit (10) further comprising:

a current-controlling trip circuit (1110) coupled to the first terminal (1120) of the trip solenoid (1115), the current-controlling trip circuit (1110) to provide a trip current to energize the trip solenoid (1115) to trip the energized pole among the first pole (30) and the second pole (45).

7. The multi-pole circuit interrupter (5) of claim 6, wherein the electronic solid-state circuit (10) further comprising:

an isolation circuit (1105) coupled between the line voltage detection circuit (1100) and the current-controlling trip circuit (1110) to isolate the line voltage detection circuit (1100) from the current-controlling trip circuit (1110).

8. The multi-pole circuit interrupter (5) of claim 6, wherein the electronic solid-state circuit (10) further comprising:

a surge protection circuit (1135) coupled to the phase A conductor (35), the phase B conductor (50) and the second terminal (1125) of the trip solenoid (1115).

9. The multi-pole circuit interrupter (5) of claim 6, wherein the current-controlling trip circuit (1110) includes a silicon controlled rectifier (SCR) (1655) having a gate, wherein the SCR (1655) is triggered by a current going into the gate.

10. The multi-pole circuit interrupter (5) of claim 1, wherein the electronic solid-state circuit (10) further comprising:

at least one of a ground fault detection circuit 1300 and an arc fault detection circuit.

11. A multi-pole circuit interrupter (5) configured to be coupled between a source (15) and a load (20), the multi-pole circuit interrupter (5) comprising:

a first switch (1605a) to energize a first pole (1610a) on a phase A conductor (1615a) of the multi-pole circuit interrupter (5);

a second switch (1605b) to energize a second pole (1610b) on a phase B conductor (1615b) of the multi-pole circuit interrupter (5);

a first line voltage detection circuit (1620a) disposed on a load side of the first switch (1605a) and the second switch (1605b), the first line voltage detection circuit (1620a) is configured to detect a change in a voltage level of the phase A conductor (1615a);

a second line voltage detection circuit (1620b) disposed on a load side of the first switch (1605a) and the second switch (1605b), the second line voltage detection circuit (1620b) is configured to detect a change in a voltage level of the phase B conductor (1615b); and

a trip circuit (1625) configured to control a current to trip an energized pole among the first pole (1610a) and the second pole (1610b) if only one of the first pole (1610a) and the second pole (1610b) is energized when a user controls a tie bar to turn on or turn off the multi-pole circuit interrupter (5) or when a trip bar fails to trip one of the first pole (1610a) and the second pole (1610b).

12. The multi-pole circuit interrupter (5) of claim 11, wherein the trip circuit (1625) further comprising:

a trip solenoid (1640) disposed adjacent to the first switch (1605a) and the second switch (1605b), the trip solenoid (1640) having a first terminal (1645a) and a second terminal (1645b).

13. The multi-pole circuit interrupter (5) of claim 12, wherein the trip circuit (1625) further comprising:

a current-controlling circuit (1650) coupled to the first terminal (1645a) of the trip solenoid (1640), the current-controlling circuit (1650) to provide a trip current to energize the trip solenoid (1640) to trip the energized pole among the first pole (1610a) and the second pole (1610b).

14. The multi-pole circuit interrupter (5) of claim 13, wherein the current-controlling circuit (1650) includes a silicon controlled rectifier (SCR) (1655) having a gate, wherein the SCR (1655) is triggered by a current going into the gate.

15. The multi-pole circuit interrupter (5) of claim 12, further comprising:

a surge protection circuit (1660) coupled to the phase A conductor (1615a), the phase B conductor (1615b) and the second terminal (1645b) of the trip solenoid (1640).