Patent ID: 11875959
Assignee: EATON INTELLIGENT POWER LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A switching device for fast disconnection of short-circuit currents, comprising:
a switching bridge with a movable contacting element and a fixed contacting element, the switching bridge being operable in a closed state, in which the movable contacting element is in contact with the fixed contacting element, and an open state, in which the movable contacting element is spaced apart from the fixed contacting element,
an electromagnetic switching drive with a coil for generating a magnetic field and a magnet anchor, wherein a movement of the magnet anchor is coupled to a movement of the switching bridge,
a guide sleeve to guide the movement of the magnet anchor in the magnetic field of the coil, the magnet anchor being arranged within the guide sleeve such that a cavity is formed below the magnet anchor,
a pyrotechnic propellant charge located in the cavity, and
a supporting device for supporting the guide sleeve,
wherein the guide sleeve and the magnet anchor and the pyrotechnic propellant charge interact such that, as a result of ignition of the pyrotechnic propellant charge within the cavity, the magnet anchor is moved from a first position within the guide sleeve at which the switching bridge is operated in the closed state to a second position within the guide sleeve at which the switching bridge is operated in the open state, wherein the supporting device and the guide sleeve are arranged such that a gap is formed between the guide sleeve and the supporting device,
wherein the gap is configured to guide a gas flow of gases produced during ignition of the pyrotechnic propellant charge and emerging from the cavity into the gap.