EP 0004213 B2 19881109 - ARC-EXTINGUISHING DEVICE WITH PNEUMATIC AND MAGNETIC SELF BLOW-OUT
Title (en)
ARC-EXTINGUISHING DEVICE WITH PNEUMATIC AND MAGNETIC SELF BLOW-OUT
Publication
Application
Priority
FR 7806078 A 19780301
Abstract (en)
[origin: EP0004213A1] 1. A selt-blast arc-extinguishing device by thermal expansion and rotation of the arc, for an electrical circuit interrupter pole having a gas-tight casing (10) filled with a gas of high dielectric rigidity, particularly sulfur hexafluoride, comprising : - a first stationary intermediate wall (16) dividing the enclosure surrounded by the casing (10) into a first (22) and a second (20) compartments, - an axially movable tubular contact (28) connected to an actuating rod (30) and cooperating with a stationary contact structure (112), the contact zone being located within said first compartment (22), said movable contact (28) sliding gastight through an orifice provided in said first wall (16) and said movable contact (28) communicating with said second compartment (20) to provide a compressed gas exhaust path from the first compartment (22) into the second compartment (20), - a magnetic blast coil (56) forming a part of said stationary contact structure (112) and located coaxially with said contacts (28, 112) in said first compartment (22), - an annular the blast coil (56) energizing electrode (116) which covers the free face of the coil (56) facing the movable contact (28), the coil (56) being electrically connected between the stationary contact (112) and the annular electrode (116) in order to generate a magnetic field to blast in rotation the arc staying on the electrode (116), the gas compressed by the rotating arc exhausting from the first compartment and blasting pneumatically the arc, characterized by the fact that it further comprises : - a third compartment (24) of the enclosure (10) separated from the first compartment (22) by a second intermediate stationary wall (18) of insulating material, the first compartment (22) being located between the second (20) and third (24) compartments - a tubular pipe (118) projecting axially through the coil (56) supported by said second wall (18) and connecting with the annular electrode (116), the last covering with a collar (114) of the stationary contact (112) the free end face of the coil (56) leaving a small free gap (120) between the annular electrode and the collar, and the movable contact (28) facing the annular electrode (116) being of a diameter smaller than that of the stationary contact (112), said pipe (118) ending in the first compartment (22) and communicating with the third compartment (24) to establish a compressed gas exhaust path from the first compartment (22) into the third compartment (24), the roots of the rotating arc being blasted towards an area for away from the stationary contact (112) by the gases exhausting from the exhaust paths.
IPC 1-7
IPC 8 full level
H01H 33/915 (2006.01); H01H 33/98 (2006.01); H01H 33/985 (2006.01)
CPC (source: EP)
H01H 33/982 (2013.01)
Designated contracting state (EPC)
BE CH DE FR GB IT
DOCDB simple family (publication)
EP 0004213 A1 19790919; EP 0004213 B1 19820210; EP 0004213 B2 19881109; DE 2962075 D1 19820318; FR 2418963 A1 19790928; FR 2418963 B1 19800822
DOCDB simple family (application)
EP 79400093 A 19790214; DE 2962075 T 19790214; FR 7806078 A 19780301