GB1121385A - Improvements in or relating to contacts for vacuum interrupters - Google Patents

Improvements in or relating to contacts for vacuum interrupters

Info

Publication number
GB1121385A
GB1121385A GB2378166A GB2378166A GB1121385A GB 1121385 A GB1121385 A GB 1121385A GB 2378166 A GB2378166 A GB 2378166A GB 2378166 A GB2378166 A GB 2378166A GB 1121385 A GB1121385 A GB 1121385A
Authority
GB
United Kingdom
Prior art keywords
contact
silver
nickel
mins
contacts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2378166A
Inventor
Allan John Wood
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
English Electric Co Ltd
Original Assignee
English Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by English Electric Co Ltd filed Critical English Electric Co Ltd
Priority to GB2378166A priority Critical patent/GB1121385A/en
Priority to CH744867A priority patent/CH460910A/en
Priority to SE07410/67A priority patent/SE325943B/xx
Priority to FR107971A priority patent/FR1524645A/en
Priority to DE19671640038 priority patent/DE1640038A1/en
Priority to US641880A priority patent/US3548135A/en
Priority to AU36839/68A priority patent/AU3683968A/en
Priority to AT405268A priority patent/AT294962B/en
Priority to NL6806076A priority patent/NL6806076A/xx
Priority to BE714486D priority patent/BE714486A/xx
Publication of GB1121385A publication Critical patent/GB1121385A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/0203—Contacts characterised by the material thereof specially adapted for vacuum switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/04—Co-operating contacts of different material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/0203—Contacts characterised by the material thereof specially adapted for vacuum switches
    • H01H2001/0205—Conditioning of the contact material through arcing during manufacturing, e.g. vacuum-depositing of layer on contact surface

Landscapes

  • Powder Metallurgy (AREA)
  • Contacts (AREA)

Abstract

The co-operating surfaces of the contacts of a vacuum switch are formed respectively of a silversilicon alloy and a silver-nickel alloy so that upon arcing between the contacts nickel silicides are formed as non-ductile films upon the surfaces of the contacts reducing the tendency to contact welding. The silver-silicon contact may be produced by melting together in vacuo 94-96% silver and 4-6% silicon, heated by R. F. induction using a molybdenum susceptor at 1050 DEG C. for 30 mins. The contact being cast and then machined. The silver-silicon contact may alternately be made by mixing 90% silver powder with 10% silicon powder, compacting under a pressure of 10 tons/in2 and sintering in vacuoat 790 DEG C. for 45 mins. The silver-nickel contact may be produced by compacting 5 micron nickel powder under 15 tons/in2 and sintering at 800 DEG C. for 20 mins. and then infiltrating the compact with silver by heating in a graphite crucible to 1050 DEG C. for 10 mins. The final contact containing between 65 and 85% nickel. In an alternative embodiment a high-purity, zone-refined copper contact co-operates with a high-purity, vacuum-outgassed titanium contact, non ductile films of copper-titanium compounds being formed during arcing.
GB2378166A 1966-05-27 1966-05-27 Improvements in or relating to contacts for vacuum interrupters Expired GB1121385A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
GB2378166A GB1121385A (en) 1966-05-27 1966-05-27 Improvements in or relating to contacts for vacuum interrupters
CH744867A CH460910A (en) 1966-05-27 1967-05-26 Pair of contacts for a vacuum circuit interrupter
SE07410/67A SE325943B (en) 1966-05-27 1967-05-26
FR107971A FR1524645A (en) 1966-05-27 1967-05-26 Contacts for vacuum switches
DE19671640038 DE1640038A1 (en) 1966-05-27 1967-05-26 Vacuum switch contacts
US641880A US3548135A (en) 1966-05-27 1967-05-29 Contacts for vacuum interrupters
AU36839/68A AU3683968A (en) 1966-05-27 1968-04-24 Improvements in or relating to contacts for vacuum interrupters
AT405268A AT294962B (en) 1966-05-27 1968-04-25 Vacuum disconnector
NL6806076A NL6806076A (en) 1966-05-27 1968-04-29
BE714486D BE714486A (en) 1966-05-27 1968-04-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2378166A GB1121385A (en) 1966-05-27 1966-05-27 Improvements in or relating to contacts for vacuum interrupters

Publications (1)

Publication Number Publication Date
GB1121385A true GB1121385A (en) 1968-07-24

Family

ID=10201226

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2378166A Expired GB1121385A (en) 1966-05-27 1966-05-27 Improvements in or relating to contacts for vacuum interrupters

Country Status (1)

Country Link
GB (1) GB1121385A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0865057A2 (en) * 1997-03-10 1998-09-16 Gec Alsthom Limited Vacuum switching device
EP4092708A1 (en) * 2021-05-21 2022-11-23 ABB Schweiz AG Vacuum interrupter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0865057A2 (en) * 1997-03-10 1998-09-16 Gec Alsthom Limited Vacuum switching device
GB2323213A (en) * 1997-03-10 1998-09-16 Gec Alsthom Ltd Vacuum switching device
EP0865057A3 (en) * 1997-03-10 1999-06-30 Alstom Uk Ltd Vacuum switching device
GB2323213B (en) * 1997-03-10 2001-10-17 Gec Alsthom Ltd Vacuum switching device
US6326573B1 (en) 1997-03-10 2001-12-04 Gec Alsthom Limited Vacuum switching device
EP4092708A1 (en) * 2021-05-21 2022-11-23 ABB Schweiz AG Vacuum interrupter
WO2022243148A1 (en) * 2021-05-21 2022-11-24 Abb Schweiz Ag Vacuum interrupter

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