Abb Technology Ag

Abb Schweiz Ag

Mats Holman

Daniel Staffas

Johannes Tredoux

Staffan Jacobsson

Ulf Åkesson

Anders Hell

A spring operated actuator for an electrical switching apparatus. It includes an opening spring, a closing spring and a damper for the closing. The damper is a rotary air damper with components that rotate relative to each other and has air as working medium for the dampening.

Spring operated switch actuator with damper for an electrical switching apparatus

A spring operated actuator for an electrical switching apparatus. The actuator has a main shaft transmitting the actuation movement to the switching apparatus and has opening spring means and closing spring means. The opening spring means includes an opening torsion spring and the closing means includes a closing torsion spring. The axes of the torsion springs extend in the same direction and at a distance from each other that is less than 20% of the external opening spring diameter.

Spring operated actuator for an electrical switching apparatus

A spring operated actuator for an electrical switching apparatus. It has an opening spring and a closing spring, one of them including a torsion spring. The torsion spring is charged in the unwinding direction and discharged in the winding direction.

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Ludvika, Sweden

Mats Holman