EP0328365A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
High voltage insulator
Assignee: Raychem Ltd
•
Filing: 1989-02-08
•
Granted: —
•
Expires: 2009-02-08
Abstract
Abstract A high voltage porcelain insulator has a plurality of sheds extending laterally thereof at spaced apart locations therealong. The creepage path length of the shedded insulator is extended by mounting polymeric insulating creepage extenders on the porcelain sheds. The creepage extenders do not extend completely around the periphery of the sheds but leave a gap. Preferably the gaps of adjacent creepage extenders along the insulator are not aligned.
Inventors
- 👤 Dave Thornley
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 20:02
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/42; H01B17/50; H01B19/00; H01B3/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49227
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
63 words
An elongate high voltage electrical insulator comprising an elongate core having at least one shed extending laterally completely therearound, and one or more components of insulating material bonded to the shed and extending laterally therefrom around part only of the perimeter of the shed, thereby to increase the longitudinal creepage path length of the shedded core around part only of the core perimeter.
Claim 2
Dependent Claim
63 words
An elongate high voltage electrical insulator comprising an elongate core having at least one shed extending laterally completely therearound, and one or more components of insulating material bonded to the shed and extending laterally therefrom around part only of the perimeter of the shed, thereby to increase the longitudinal creepage path length of the shedded core around part only of the core perimeter.
Claim 3
Dependent Claim
28 words
An insulator according to claim 1, wherein the or all the insulating components leave a peripheral gap around the shed that totals not more than 90° of arc.
Claim 4
Dependent Claim
17 words
An insulator according to claim 2, wherein the peripheral gap is between 5° and 30° of arc.
Claim 5
Dependent Claim
23 words
An insulator according to any one of the preceding claims, consisting of only one of said components which is wrapped around the shed.
Claim 6
Dependent Claim
18 words
An insulator according to any preceding claim, wherein the or each insulating component is made from polymeric material.
Claim 7
Dependent Claim
18 words
An insulator according to claim 5 wherein the or each polymeric component is recovered on to the shed.
Claim 8
Dependent Claim
28 words
An insulator according to any one of the preceding claims, comprising a plurality of sheds each of which has one or more of said insulating components bonded thereto.
Claim 9
Dependent Claim
40 words
An insulator according to claim 7, wherein the or each peripheral gap associated with any one of the sheds is not aligned, around the periphery of the core, with the or each peripheral gap associated with an immediately adjacent shed.
Claim 10
Dependent Claim
23 words
An insulator according to any one of the preceding claims, wherein the core and said at least one shed is formed from porcelain.
Claim 11
Independent Claim
78 words
A method of increasing the longitudinal creepage current resistance of an elongate high voltage electrical insulator, the insulator comprising an elongate core having at least one shed extending laterally completely therearound, wherein one or more components of insulating material are bonded to the shed so as to extend laterally therefrom around part only of the perimeter of the shed, thereby to increase the longitudinal creepage path length of the shedded core around part only of the core perimeter.
Claim 12
Independent Claim
78 words
A method of increasing the longitudinal creepage current resistance of an elongate high voltage electrical insulator, the insulator comprising an elongate core having at least one shed extending laterally completely therearound, wherein one or more components of insulating material are bonded to the shed so as to extend laterally therefrom around part only of the perimeter of the shed, thereby to increase the longitudinal creepage path length of the shedded core around part only of the core perimeter.
Claim 13
Dependent Claim
24 words
A method according to claim 10, wherein the or each insulating component is made of recoverable material and is recovered on to the shed.
Claim 14
Independent Claim
16 words
A method of forming an insulator in accordance with any one of claims 1 to 9.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.