Schneider Electric Industries Sa

Alain Bechard

Denis Perrin

Reynald Marin-Pache

A drive mechanism of a circuit breaker comprises a master mechanism and a slave mechanism. The master mechanism is composed of an energy storage sub-assembly comprising an energy storage spring driven by a loading shaft, and an opening and closing sub-assembly driving a switching shaft. The master mechanism is controlled by a closing latch and an opening latch. The slave mechanism comprises a closing assistance spring connected to the loading shaft by means of a loading cam and a multifunctional lever. Rotation of the loading shaft loads the assistance spring and commands relaxation thereof. The assistance spring drives the switching shaft by means of an arm operating in conjunction with a crank in the form of a hook. At the end of closing travel, the arm uncouples from the crank and withdraws so as not to hamper opening of the mechanism. The assistance mechanism enables the energy delivered globally by the drive mechanism to be increased.

Closing assistance mechanism for an electrical switchgear apparatus and drive mechanism of an electrical switchgear apparatus equipped with such an assistance mechanism

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Grenoble, France

Alain Bechard