SELF-ALIGNING SECONDARY DISCONNECT DEVICE FOR ELECTRICAL SWITCHGEAR

• US 20120228098A1
• Filed: 03/10/2011
• Published: 09/13/2012
• Est. Priority Date: 03/10/2011
• Status: Active Grant

• Current Assignee: ABB SPA (ABB Limited)
• Original Assignee: General Electric Company
• Inventors: Sudhakar, Sapuram, PAI, Arvind, Bavikar, Kapil Vinodrao, Sisson, Glen Charles
• Granted Patent: US 8,497,439 B2
• Time in Patent Office: Days
• US Class Current: 200/50.27
• CPC Class Codes: H01H 71/08 Terminals; Connections
• CPC Class Codes: H02B 11/127 Withdrawal mechanism

Abstract

A secondary disconnect apparatus for a circuit breaker, for making a slidable electrical connection with a mating enclosure-side secondary disconnect apparatus, is disclosed, having a pair of stop plate surfaces coupled to the circuit breaker defining a first linear distance D1, and a lateral adjustment portion in slidable communication with a pair of a guide members configured to guide movement of the lateral adjustment portion along an axis in one of a first and a second direction. The apparatus includes and a pair of adjustment member surfaces coupled to the lateral adjustment portion defining a second linear distance D2, wherein the adjustment member surfaces are configured to cooperate with the stop plate surfaces to limit the travel of lateral adjustment portion, and wherein a total predetermined lateral distance of travel of lateral adjustment portion 250 is defined based on at least the difference between first distance D1 and second distance D2.

Claims

1. A secondary disconnect apparatus for a circuit breaker, for making an electrical connection with a mating enclosure secondary disconnect apparatus, the apparatus comprising:

a first stop plate 262 comprising a first stop plate surface 262a;

a second stop plate 292 comprising a second stop plate surface 292a;

said first and second stop plates 262, 292 being configured to be coupled to the circuit breaker such that said first and second stop plate surfaces 262a, 262b are spaced apart to define a first distance D1;

a secondary terminal member 129, arranged and disposed to facilitate a slidable connection with the mating enclosure secondary disconnect assembly;

a base portion 227 configured to support said secondary terminal member 129;

a lateral adjustment portion 250 coupled to said base portion 227, comprising a first adjustment member surface 252a and a second adjustment member surface 252b, the adjustment member surfaces 252a, 252b being spaced apart to define a second distance D2;

a first guide member 271 and a second guide member 272 being in slidable communication with, and configured to guide a movement of said lateral adjustment portion 250 along an axis in one of a first and a second direction;

wherein said first adjustment member surface 252a is configured to cooperate with said first stop plate surface 262a to limit the travel of lateral adjustment portion 250 in the first direction, and said second adjustment member surface 252b is configured to cooperate with said second stop plate surface 292a to limit the travel of lateral adjustment portion 250 in the second direction;

and wherein a total predetermined lateral distance of travel of lateral adjustment portion 250 is based on at least the difference between first distance D1 and second distance D2.

2. The secondary disconnect apparatus of claim 1 further comprising a plurality of resilient members configured and disposed to provide a return force in a direction opposite the first direction of travel of lateral adjustment portion 250.

3. The secondary disconnect apparatus of claim 1 further comprising a plurality of resilient members configured and disposed to provide a return force in a direction opposite the second direction of travel of lateral adjustment portion 250.

4. The secondary disconnect apparatus of claim 1 wherein said first guide member 271 and said second guide member 272 are pins.

5. The secondary disconnect apparatus of claim 1 wherein said first distance D1 is greater than second distance D2.

6. The secondary disconnect apparatus of claim 1 further comprising an anchor member 272 mechanically coupled with circuit breaker 120 and configured to support said first and second stop plates 262, 292.

7. The secondary disconnect apparatus of claim 1 wherein said lateral adjustment portion 250 comprises a U-shaped cross section