Electrode arrangement for an electrical component

• US 9,337,646 B2
• Filed: 06/21/2012
• Issued: 05/10/2016
• Est. Priority Date: 06/29/2011
• Status: Active Grant

• Current Assignee: Siemens Energy Global GmbH & Co. KG (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Sulitze, Markus
• Primary Examiner(s): Tran, Thienvu
• Assistant Examiner(s): Brooks, Angela
• Application Number:
  US14/130,060
• Publication Number:
  US 20140139966A1
• Time in Patent Office: 1,419 Days
• Field of Search: 361/118
• US Class Current: 1/1
• CPC Class Codes: H01T 4/00 Overvoltage arresters using spark gaps H01T2/00 takes precedence; overvoltage protection circuits using spark gaps H02H9/06
• CPC Class Codes: H01T 4/04 Housings H01T4/06 takes precedence
• CPC Class Codes: H01T 4/14 Arcing horns associated with insulators H01B17/46
• CPC Class Codes: H02H 3/22 of short duration, e.g. lightning

Abstract

An electrode configuration for an electrical component, in particular a surge protector, includes two electrodes extending in a plate-shaped manner parallel to a radial plane relative to a connection axis of the electrodes, defining an axial direction. At least one electrode has a connection region lying in the radial plane and at least two, three or four ribbon-shaped strips each extending away from the connection region and at least partially in circumferential direction relative to the axial direction. A fault arc, occurring during a lightning strike, can be conducted outwards away from the electrical component and forced into rotation around the electrical component in an effective manner due to the ribbon-shaped strips at the outer edge of the connection region and at least two ribbon-shaped strips overlapping each other at a spacing with respect to their delimiting surfaces lying perpendicular to the axial direction.

Claims

1. An electrode configuration for an electrical component, the electrode configuration comprising:

two electrodes having a connection axis defining an axial direction, a radial plane extending radially relative to said connection axis and a circumferential direction extending circumferentially relative to said axial direction;

said electrodes each extending in a plate-shaped manner parallel to said radial plane;

at least one of said electrodes having a connection region lying in said radial plane and at least two ribbon-shaped strips each running away from said connection region at least partly in said circumferential direction;

said connection region having an outer edge;

said ribbon-shaped strips running outwardly in a spiral fashion in said circumferential direction from said outer edge of said connection region; and

at least two of said ribbon-shaped strips having delimiting surfaces each lying perpendicular to said axial direction and overlapping each other at a distance.

2. The electrode configuration according to claim 1, wherein said at least two ribbon-shaped strips are three or four ribbon-shaped strips.

3. The electrode configuration according to claim 1, wherein:

said ribbon-shaped strips have a longitudinal direction;

said ribbon-shaped strips have, one after another in said longitudinal direction, an initial region bordering said connection region, a first transition region adjoining said initial region, a center region adjoining said first transition region, a second transition region adjoining said center region and an end region adjoining said second transition region; and

said initial region, said center region and said end region have a larger radius of curvature than said first and second transition regions.

4. The electrode configuration according to claim 3, wherein said end region of one of said ribbon-shaped strips overlaps said center region of an adjacent one of said ribbon-shaped strips in said axial direction.

5. The electrode configuration according to claim 1, wherein:

said ribbon-shaped strips each have a length, a center region and an end region along said length; and

said ribbon-shaped strips are bent in said center region into an S-shape with an offset in said axial direction, placing said end regions in a plane offset parallel to said radial plane of said connection region.

6. The electrode configuration according to claim 1, wherein said ribbon-shaped strips each have a free end region, and said free end region of at least one of said ribbon-shaped strips tapers to a point with a tapering on a radially inner side in said axial direction.

7. A surge arrester, comprising:

said electrode configuration having two electrodes according to claim 1.

8. The electrode configuration according to claim 1, wherein said delimiting surfaces of said ribbon-shaped strips are outermost surfaces of said ribbon-shaped strips.