Abb Technology Ag

Manuel Gotti

Stefano Magoni

Roberto Usai

Gabriele Gasparini

A switching device comprising control means for controlling the switching operations of the device, the control means receiving the sensing signals generated by a sensor means; the control means are arranged so that, during execution of a switching operation, the control means send a first control signal to a power supply means to start with the supply of excitation current from a first instant onwards; determine, on the base of the information provided by the sensing signals, a second instant, at which the power supply means have to stop with the supply of excitation current, the second instant occurring before the movable plunger has reached the stop position during the movement from the start position towards the stop position; send a second control signal to the power supply means to stop with supply of excitation current from the second instant and until a movable plunger reaches the stop position.

Electromagnetically actuated switching device and a method for controlling the switching operations of said switching device

A mechanical override device which is suitable for an undervoltage coil of a switching unit, is comprised of a first portion suitable for urging a plunger of the undervoltage coil in a first position which is taken by the plunger when the undervoltage coil is energized, and a second portion suitable for receiving an external movement command for imposing an operating movement to the first portion. The override device further comprises movement control means for controlling one or more cinematic parameters of the first portion so as to make the operating movement independent from the external movement command.

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Bergamo, Italy

Manuel Gotti