The motor starter of any one of the preceding claims, further comprising a second over-current protection circuitry (206 2) connected in a parallel circuit with the micro-electromechanical system switching circuitry and the first over-current protection circuitry, the second over protection circuitry configured to momentarily form an electrically conductive path in response to a second switching event of the micro-electromechanical system switching circuitry, said electrically conductive path in a parallel circuit with the micro-electromechanical system switching circuitry for suppressing arc formation between contacts of the micro-electromechanical system switching circuitry during the second switching event.ĥ.
The motor starter of claim 4, further comprising a second pulse circuit (229) coupled to the balanced diode bridge, the pulse circuit comprising a pulse capacitor adapted to form a pulse signal for causing flow of a pulse current through the balanced diode bridge, the pulse signal being generated in connection with a turn-off of the micro-electromechanical system switching circuitry to a non-conductive state, said turn-off constituting the second switching event.Ħ. The motor starter of any one of the preceding claims, further comprising solid state switching circuitry (204) coupled in a parallel circuit with the micro-electromechanical switching circuitry and the first over-current protection circuitry.ħ. The motor starter of claim 6, further comprising a controller (208) coupled to the electromechanical switching circuitry and the solid state switching circuitry, the controller configured to perform selective switching of a load current from a motor connected to the motor starter, the selective switching performed between the electromechanical switching circuitry and the solid state switching circuitry in response to a load current condition appropriate to an operational capability of a respective one of the switching circuitries.Ĩ. The motor starter of claim 7, wherein the controller is configured to perform arc-less switching of the micro-electromechanical system switching circuitry responsive to a detected zero crossing of an alternating source voltage or alternating load current.ĩ. The motor starter of claim 7, wherein the controller is configured to perform a soft motor start by switching the solid state switching circuitry in correspondence with a variable phase angle in an alternating source voltage or alternating load current, thereby adjusting an amount of electrical energy resulting from a stream of current pulses for starting the motor.ġ0.
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