CIRCUIT BREAKER FOR MOTOR PROTECTION AND/OR LINE PROTECTION

1 - 8 . (canceled)

9 : A manually operated circuit breaker for motor protection and/or line protection, comprising:

a basic board including a switching mechanism, a contact device, and a main current path, the switching mechanism including a switching apparatus and a breaker latching mechanism;

a manual actuating device disposed in a housing part protruding from an operating front and configured to activate the switching mechanism via a rotary knob and an actuating shaft, the actuating shaft being disposed perpendicular to the operating front;

an electronic control unit module pluggable onto the basic board and configured to be set with at least one control variable for a fault scenario so as to activate the switching mechanism by indicating a settable fault scenario, the electronic control unit being supplied with a voltage from the main current path via the contact device;

an actuator unit including an energy storing device configured to activate the breaker latching mechanism; and

a tripping element configured to respond to a settable fault criterion.

10 : The manually operated circuit breaker as recited in claim 9 , wherein the voltage is supplied to the electronic control unit via a current transformer.

11 : The manually operated circuit breaker as recited in claim 9 , wherein the contact device is configured so as to prevent contact therewith when the electronic control unit is not plugged onto the basic board.

12 : The manually operated circuit breaker as recited in claim 9 , further comprising an affixing device configured to affix a lead seal to the electronic control unit when the electronic control unit is plugged onto the basic board.

13 : The manually operated circuit breaker as recited in claim 9 , wherein the tripping element includes an undervoltage tripping function.

14 : The manually operated circuit breaker as recited in claim 9 , further comprising a blocking device configured to be activated by the manual actuation device and to resist removal of the electronic control unit when the circuit breaker is in an ON position.

15 : The manually operated circuit breaker as recited in claim 14 , wherein the blocking device includes a blocking mechanism configured to be actuated by the actuating shaft so as to resist and so as to permit a plugging movement of the tripping module.

16 : The manually operated circuit breaker as recited in claim 9 , wherein the manual actuating device is configured to be lockable.

17 : The manually operated circuit breaker as recited in claim 10 , wherein the contact device is configured so as to prevent contact therewith when the electronic control unit is not plugged onto the basic board.

18 : The manually operated circuit breaker as recited in claim 10 , further comprising an affixing device configured to affix a lead seal to the electronic control unit when the electronic control unit is plugged onto the basic board.

19 : The manually operated circuit breaker as recited in claim 10 , wherein the tripping element includes an undervoltage tripping function.

20 : The manually operated circuit breaker as recited in claim 10 , further comprising a blocking device configured to be activated by the manual actuation device and to resist removal of the electronic control unit when the circuit breaker is in an ON position.

21 : The manually operated circuit breaker as recited in claim 20 , wherein the blocking device includes a blocking mechanism configured to be actuated by the actuating shaft so as to resist and so as to permit a plugging movement of the tripping module.

22 : The manually operated circuit breaker as recited in claim 10 , wherein the manual actuating device is configured to be lockable.

23 : The manually operated circuit breaker as recited in claim 15 , wherein the manual actuating device is configured to be lockable.

24 : The manually operated circuit breaker as recited in claim 21 , wherein the manual actuating device is configured to be lockable.