Electromagnetic actuation device for remote control block of electrical protection apparatus i.e. switch gear, of multiphase electric installation, has base with recess crossing core between opposed walls, so that air-gap is not zero

The device (100) has a magnetic plunger core (120) with a base (121) located parallel to a base wall (111) in a rectangular carcass and an opposite external portion (122). The core slides along a displacement axis (AA), so that the external portion achieves a position entirely out of the carcass and a partially entered position in the carcass. A section of the core located orthogonal to the axis is rectangular in shape. The base is provided with a transverse recess (125) crossing the core between two opposed walls, so that an air-gap (e) between the core and the carcass is not zero. The core and the carcass are made of sintered material. Un actionneur électromagnétique (100) à section rectangulaire, tant pour le noyau (120) que la carcasse (110) et la bobine (102) a été optimisé pour un actionnement d'une manette d'un bloc de commande à distance d'un système de protection électrique. En particulier, des moyens (125, 126, 115) sont prévus pour ralentir le noyau (120) en fin de course, et pour amortir sa buté en fond de carcasse (111).