Vacuum interrupter with a single internal assembly for generating an axial magnetic field
AssigneeEaton Corporation
InventorsMichael Bruce Schulman, Paul G. Slade
Life of this patent
Estimating the term…
Abstract
An axial magnetic field vacuum interrupter includes a field producing structure associated with only one of two opposing electrode assemblies. The field producing structure is characterized in that when the instantaneous peak arc current is I.sub.m, measured in kiloamperes, and the electrode assemblies are in the open circuit position, the instantaneous component of the axial magnetic filed (AMF) B in the axial direction B.sub.a, measured in milliteslas, imposed on the majority of each electrode contact surface is given by the analytical expression. ##EQU1##
Claims6
A vacuum interrupter having a maximum interruption capability of peak current I.sub.m, comprising first and second coaxially aligned electrode assemblies that are relatively movable along a common longitudinal axis between an open circuit position and a closed circuit position, each including a contact surface confronting the contact surface of the other electrode assembly, only the first electrode assembly including axial magnetic field means for producing a substantially longitudinal magnetic field B in a contact gap between the contact surfaces, wherein with the electrode assemblies in the open circuit position and the instantaneous arc current being I.sub.m measured in kiloamperes, the instantaneous component of B in the axial direction B.sub.a, measured in milliteslas, imposed on the majority of each contact surface is:
- 5I.sub.m mT/kA>B.sub.a .gtoreq.3.2 (I.sub.m -9 kA) mT/kA.
Dependencies are inferred from the claim text.