Spout for switchgear, switchgear having spout, and method thereof

Patent metadata

Field	Value
Publication number	US-10230221-B2
Application number	US-201715485484-A
Country	US
Kind code	B2
Filing date	Apr 12, 2017
Priority date	Jun 13, 2013
Publication date	Mar 12, 2019
Grant date	Mar 12, 2019

Abstract

A spout for a connection between a bus bar and a circuit breaker in switchgear includes a housing and a fixed contact. The housing is formed of insulative material and includes a tubular body having an inner cavity and a radial first ventilation opening, a base portion having a first longitudinal opening, and a fixed contact receiving portion having a second longitudinal opening. The fixed contact is formed of a conductive material, has an outer contact surface exposed through the second longitudinal opening, and forms a portion of an outer surface of the spout. A switchgear includes a wall dividing a circuit breaker compartment from a bus bar compartment, and the base portion of the spout is securable to the wall.

First claim

What is claimed is:

1. A spout for a connection between a bus bar and a circuit breaker in a switchgear, the spout having an outer surface and comprising:
a housing formed of insulative material, including:
a tubular body having an inner cavity, a radial first ventilation opening, and a second ventilation opening;
a base portion having a first longitudinal opening therethrough, the first longitudinal opening opposing the second ventilation opening; and
a fixed contact receiving portion, having a second longitudinal opening, wherein the second ventilation opening is formed between the fixed contact receiving portion and the tubular body, and provides ventilation from an exterior of the spout into the inner cavity; and

a fixed contact formed of an electrically conductive material and having an outer contact surface exposed through the second longitudinal opening, the fixed contact forming a portion of the outer surface of the spout, wherein the tubular body includes a lip extending longitudinally past the outer contact surface of the fixed contact and at least partially surrounding the second ventilation opening.

2. The spout of claim 1 , wherein the first ventilation opening includes a heat dissipation channel extending radially outwardly from the tubular body.

3. The spout of claim 1 , wherein the first ventilation opening is unblocked by the bus bar for heat dissipation from the inner cavity.

4. The spout of claim 1 , wherein the fixed contact includes a tubular extension within the inner cavity and a fixed contact wall having the outer contact surface.

5. The spout of claim 1 , wherein the housing is integrally molded to the fixed contact.

6. The spout of claim 1 , wherein the tubular body includes a step type creepage skirt.

7. The spout of claim 1 , wherein the second ventilation opening is an off-axis opening through the fixed contact receiving portion.

8. The spout of claim 1 , wherein the second ventilation opening is disposed at a longitudinally opposite end of the spout from the first longitudinal opening.

9. The spout of claim 1 , wherein the fixed contact receiving portion is located opposite the base portion.

10. The spout of claim 1 , wherein the first longitudinal opening is arranged to access the inner cavity of the housing from the base portion.

11. The spout of claim 1 , wherein the fixed contact receiving portion is located opposite the base portion.

12. The spout of claim 11 , wherein the fixed contact receiving portion is a wall substantially parallel to the base portion.

13. The spout of claim 1 , wherein the second longitudinal opening is sized and disposed to operatively receive the fixed contact therein.

14. The spout of claim 1 , wherein the inner cavity is located between the fixed contact receiving portion and the base portion.

15. The spout of claim 1 , wherein the base portion is disposed at a first longitudinal end of the inner cavity, and the fixed contact receiving portion is disposed at a second longitudinal end of the inner cavity.

16. A spout for a connection between a bus bar and a circuit breaker in a switchgear, the spout having an outer surface and comprising:
a housing formed of insulative material, including:
a tubular body, having an inner cavity, a radial first ventilation opening, and a second ventilation opening;
a base portion having a first longitudinal opening therethrough, the first longitudinal opening opposing the second ventilation opening; and
a fixed contact receiving portion, having a second longitudinal opening, wherein the second ventilation opening is formed between the fixed contact receiving portion and the tubular body, and provides ventilation from an exterior of the spout into the inner cavity; and

a fixed contact formed of an electrically conductive material and having an outer contact surface exposed through the second longitudinal opening, the fixed contact forming a portion of the outer surface of the spout, wherein the second ventilation opening is an off-axis opening through the fixed contact receiving portion.

17. The spout of claim 16 , wherein the first ventilation opening includes a heat dissipation channel extending radially outwardly from the tubular body.

18. The spout of claim 16 , wherein the first ventilation opening is unblocked by the bus bar for heat dissipation from the inner cavity.

19. The spout of claim 16 , wherein the tubular body includes a lip extending longitudinally past the outer contact surface of the fixed contact and at least partially surrounding the second ventilation opening.

20. The spout of claim 16 , wherein the fixed contact includes a tubular extension within the inner cavity and a fixed contact wall having the outer contact surface.

21. The spout of claim 16 , wherein the housing is integrally molded to the fixed contact.

22. The spout of claim 16 , wherein the tubular body includes a step type creepage skirt.

23. The spout of claim 16 , wherein the second ventilation opening is disposed at a longitudinally opposite end of the spout from the first longitudinal opening.

24. The spout of claim 16 , wherein the first longitudinal opening is arranged to access the inner cavity of the housing from the base portion.

25. The spout of claim 16 , wherein the fixed contact receiving portion is located opposite the base portion.

26. The spout of claim 25 , wherein the fixed contact receiving portion is a wall substantially parallel to the base portion.

27. The spout of claim 16 , wherein the second longitudinal opening is sized and disposed to operatively receive the fixed contact therein.

28. The spout of claim 16 , wherein the inner cavity is located between the fixed contact receiving portion and the base portion.

29. The spout of claim 16 , wherein the base portion is disposed at a first longitudinal end of the inner cavity, and the fixed contact receiving portion is disposed at a second longitudinal end of the inner cavity.

Assignees

• Abb Schweiz Ag

Inventors

• Wu Hao
• Li Liying
• Meng He
• Ren Xuhui
• Xing Rui
• Zheng Fangwei

Classifications

• H01R13/10

  Sockets for co-operation with pins or blades · CPC title

• H01R4/70

  Insulation of connections (end caps H01R4/22) · CPC title

• H02B11/04 Primary

  Isolating-contacts, e.g. mountings or shieldings · CPC title

• H02B13/005 Primary

  Electrical connection between switchgear cells · CPC title

• H02B1/56

  Cooling; Ventilation · CPC title