Surge arrester, and manufacturing process for a surge arrester

Patent metadata

Field	Value
Publication number	US-2021287830-A1
Application number	US-201816490089-A
Country	US
Kind code	A1
Filing date	Feb 27, 2018
Priority date	Mar 7, 2017
Publication date	Sep 16, 2021
Grant date	—

Abstract

A surge arrester includes a fluid-tight housing and a pressure relief assembly constructed to provide a fluid-conducting connection to the outside of the housing if a gas pressure inside the housing exceeds a threshold value. The pressure relief assembly is secured to the housing by at least one twist lock or lockable rotary closure. A corresponding manufacturing process for a surge arrester is also provided.

First claim

1 - 13 . (canceled)

14 . A surge arrester, comprising:
a fluid-tight housing having an outside; a pressure relief assembly configured to provide a fluid-conducting connection to said outside of the housing if a gas pressure inside said housing exceeds a threshold value; and at least one lockable rotary closure securing said pressure relief assembly to said housing.

15 . The surge arrester according to claim 14 , wherein said lockable rotary closure includes a plurality of locking projections being secured by rotating in complementary recesses of said housing.

16 . The surge arrester according to claim 14 , wherein said pressure relief assembly includes a substantially cup-shaped locking device having a base and a side wall.

17 . The surge arrester according to claim 16 , wherein:
said cup-shaped locking device has a cup interior; said side wall has an inner side facing toward said cup interior; and said locking device includes a plurality of support ribs disposed along said inner side.

18 . The surge arrester according to claim 16 , wherein said housing has an interior, and said side wall includes a first outflow opening connected in a fluid-conducting manner to a second outflow opening in said housing in an assembled state, causing a deflection of a fluid flow out of said cup-shaped locking device through said first and second outflow openings to take place if a fluid flows out of said interior of said housing.

19 . The surge arrester according to claim 16 , wherein:
said cup-shaped locking device has a cup interior; said side wall has an outer side facing away from said cup interior; and said lockable rotary closure includes at least three locking projections disposed along said outer side.

20 . The surge arrester according to claim 16 , wherein said cup-shaped locking device has a cup interior, and said base bulges toward said cup interior.

21 . The surge arrester according to claim 14 , which further comprises:
ends of the surge arrester; said pressure relief assembly being disposed at one of said ends of the surge arrester; and said pressure relief assembly including a membrane constructed to tear if the threshold value for the gas pressure is exceeded.

22 . The surge arrester according to claim 21 , which further comprises:
first and second contact pressure devices; said membrane having a side facing towards the surge arrester being laid on said first contact pressure device; and said membrane having a side facing away from the surge arrester being secured by said second contact pressure device.

23 . The surge arrester according to claim 20 , wherein said pressure relief device includes an assembly projection on a side of said base facing away from said cup interior for transmitting a rotational movement.

24 . A process for manufacturing a surge arrester, the process comprising the following steps:
placing a membrane on a fluid-tight housing; placing a pressure relief assembly having at least one lockable rotary closure on the housing; locking the rotary closure on the housing while securing the membrane; and using the pressure relief assembly to provide a fluid-conducting connection to an outside of the housing if a gas pressure inside the housing exceeds a threshold value.

25 . The manufacturing process according to claim 24 , which further comprises placing the membrane between first and second contact pressure devices by placing the first contact pressure device on a side of the membrane facing toward the surge arrester and placing the second contact pressure device on a side of the membrane facing away from the surge arrester.

26 . The manufacturing process according to claim 24 , which further comprises:
forming the pressure relief device as a substantially cup-shaped locking device having a base and a side wall; locking the locking device on the housing by exerting an assembly machine force on an assembly projection on a side of the base facing away from a cup interior of the locking device; and securing the locking device on the housing by rotating.

Assignees

• Siemens Ag

Inventors

• Pippert Erhard

Classifications

• H01C7/126 Primary

  Means for protecting against excessive pressure or for disconnecting in case of failure · CPC title

• H01T4/04

  Housings (H01T4/06 takes precedence) · CPC title

• H01T1/15

  for protection against excessive pressure · CPC title