Abstract:
An electric switching device (1) filled with a dielectric insulating medium comprises first and second arcing contact (3, 4), first exhaust volume (7) downstream of first arcing contact (3) and second exhaust volume (8) downstream of second arcing contact (4). The exhaust volumes (7, 8) comprise several first openings (14) in their walls (17), through which the insulating medium exits into third volume (9). The third volume (9) is arranged around the first or second exhaust volume (7, 8) and is radially delimited by the wall (17) of the exhaust volumes (7, 8) and by an exterior wall (11) having second openings (10) through which the insulating medium exits the third volume (9). One baffle device (2) is provided inside third volume (9) such that vortex flow of the insulating medium is generated when it passes the baffle device (2) on its way towards the second openings (10).
Abstract:
An electric switching device filled with a dielectric insulating medium includes first and second arcing contact, first exhaust volume downstream of first arcing contact and second exhaust volume downstream of second arcing contact. The exhaust volumes includes several first openings in their walls, through which the insulating medium exits into third volume. The third volume is arranged around the first or second exhaust volume and is radially delimited by the wall of the exhaust volumes and by an exterior wall having second openings through which the insulating medium exits the third volume. One baffle device is provided inside third volume such that vortex flow of the insulating medium is generated when it passes the baffle device on its way towards the second openings. Turbulent flow conditions are chosen such that gravitational force allows to trap or contributes to trap particles in the baffle device. The baffle device comprises baffle plates or fins, that are arranged to form cavities for capturing the particles by gravitational force.
Abstract:
The gas-insulated HV switching device comprises a contact arrangement with two arcing contacts, one of which being designed as a contact tulip (21), an auxiliary nozzle (40) enclosing at least partially the contact tulip (21) and a tubular electrostatic shield (42), which protrudes along an axis (A) beyond a free end of the contact tulip (21). In order improve the switching performance of the switching device the tubular electrostatic shield (42) is electrically connected to the contact tulip (21) and is integrated in an electrical circuit comprising a current limiter (resistors 43, 44) and extending from the shield (42) through the current limiter to an end of the contact tulip (21) which is arranged opposite its free end.