| 摘要 |
The invention relates to an electronic tripping unit for a motor-circuit breaker of an electric motor comprising at least one detection unit (110, 211, 212, 213) for detecting at least one current measuring value of at least one current which is guided to the electric motor, at least one discriminator circuit (120, 220) comprising an outlet for outputting a control signal for controlling the motor. The discriminator circuit (120, 220) is located in a first state when the current measuring value of the at least one current measuring value does not exceed a predefined minimum triggering level. The discriminator circuit (120, 220) is located in a second state when at least one current measuring value of the at least one current measuring value exceeds the predefined minimum triggering value and the discriminator circuit (120, 220) in the first state places the output signal onto a second level and the discriminator circuit (120, 220) comprises a current-limiting component. The predefined minimum triggering value is determined by the breakdown voltage of the current-limiting component. |
