EP0214848A2 - Interrupteur sectionneur électrique - Google Patents

Interrupteur sectionneur électrique Download PDF

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Publication number
EP0214848A2
EP0214848A2 EP86306865A EP86306865A EP0214848A2 EP 0214848 A2 EP0214848 A2 EP 0214848A2 EP 86306865 A EP86306865 A EP 86306865A EP 86306865 A EP86306865 A EP 86306865A EP 0214848 A2 EP0214848 A2 EP 0214848A2
Authority
EP
European Patent Office
Prior art keywords
contact member
moving contact
break
isolator switch
electrical isolator
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.)
Withdrawn
Application number
EP86306865A
Other languages
German (de)
English (en)
Other versions
EP0214848A3 (fr
Inventor
Stanley William Clives
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.)
Ashley Accessories Ltd
Original Assignee
Ashley Accessories 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 Ashley Accessories Ltd filed Critical Ashley Accessories Ltd
Publication of EP0214848A2 publication Critical patent/EP0214848A2/fr
Publication of EP0214848A3 publication Critical patent/EP0214848A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/001—Means for preventing or breaking contact-welding

Definitions

  • This invention relates to electric switches applicable to mains electrical customers' units for isolation purposes.
  • isolator switches between incoming mains and sub-circuit fuses or circuit breakers.
  • Such isolator switches may be of knife-action type, typically double knife-action for live and neutral lines, or of biased cantilver type.
  • isolator switches are being made available in a modular form, typically a slim casing with the switch lever or dolly protruding from one edge. It is an object of this invention to provide a viable alternative switching mechanism suitable for isolator switches.
  • an electrical isolator switch has a moving contact member in the form of a link bridging between spaced stationary contacts in its make position, and the moving contact member is both biased towards make and associated with break-forcing means so that operation of the latter results in preference for the moving contact member to break its electrical contact with one of the stationary contacts rather than the other.
  • Stationary break action results where the moving contact member effectively pivots against it bias and about its engagement of said other stationary contact, but can be broken at the latter if the moving contact member is reluctant to break from the said one stationary contact, such as can occur at contact welding.
  • the biasing is applied to the moving contact member by a spring acting at a position between the stationary contacts but closer to said other than to said one thereof, or at least to one side of a moving contact engager of the break-forcing means which serves to act on the moving contact member between its bias spring position and said one stationary contact.
  • Preferred break-forcing means is of toggle action in continual engagement between a switch dolly or handle and the moving contact member, preferably with positive retaining relation between the link and the moving contact member.
  • a link or lever of the break-forcing means may be hinged or pivotted to the switch dolly or handle. Such a link should at least bear on the moving contact member if not be further hinged or pivotted thereto.
  • a suitable link can be entrant via an end into a relieved location of the moving contact member, and a suitable relieved location is a through-hole into or through which enters an end portion of the link or lever that is shouldered or pinned to engage on the moving contact member, preferably further pinned or spread beyond the latter for positive retraction of the moving contact member back into its make state.
  • Such an isolator switch mechanism may be of single, or more, phase action. It is readily installed in a slim housing of the type mentioned above, one for each phase if preferred, say then with its switch dollys or other operating means engaged.
  • a preferred insulator switch mechanism has its fixed spaced contacts to be bridged by the moving contact member located between spaced plates, and its moving contact member guided between such plates, preferably, at least for one end, say its unfavoured break end (but possibly for both ends), via co-operting formations, for example involving grooves or other indentation of those side plates.
  • a slim housing 10 is shown with a pivot position 12 for a switch dolly or handle indicated only by lines 14 for the ON position and 14' for the OFF position, and shown angled at the pivot position to present a toe 14T itself pivoted or hinged, see 16, to a link or lever 18 that acts on a moving contact member 20 shown bridging a space between two fixed contact members 22, 24 and electrically interconnecting same in the ON state, and with the normal OFF and alternative OFF positions indicated by dashed lines 20X and 20Y, respectively.
  • FIG. 1 Electrical connection is indicated in Figure 1 as being by mating contacts 22A, 22B and 24A, 24B formed in or on or suitably secured to end-adjacent positions on the contact members, say in the well-known rivetted manner in holes through those members.
  • a variant shown in Figure 3 has a domed contact 22B' at the normally pivotting end of the moving contact member, and Figure 4 shows no contact at the other end of the moving contact member, say where reliance is made simply on suitable facing of at least that end.
  • any suitable contact system may be used, in like manner as can any switch dolly or handle that can be linked to the moving contact member to achieve desired breaking action relative thereto.
  • the moving contact member 20 is in a well 26 of the housing 10 and is shown biased by a compression spring 28 suitably located in the well 26 and on the contact member 20, say be seating recess 28A and a pip 28B as shown, or vice versa, or some other suitable system.
  • the position of the spring 28 is between end positions of the moving contact member 20 and closer to one end, shown to the left hand side of Figure 1 and carrying the contact 22B.
  • Both of the asymmetric location of the spring 28 relative to the moving contact member 20 and the oppositely asymmetric location of engagement of the toggle link 18 also relative to the length of the moving contact member 20 contribute to favouring break (20X) at the contact 24B, but a disinclination so to do does not preclude alternative breaking (20Y) at the contact 22B, say where there is a contact weld at the contact 24B.
  • Such alternative contract breaking (22Y) will encourage breaking of such weld.
  • the moving contact member 20 is conveniently guided between spaced parallel locating plates 30A, 30B and 32A, 32B with at least one pair thereof preferably providing further guidance/location for the moving contact member 20, say via grooves, slots or other recesses (33A, 33B) therein or protrusions 34 from sides of the moving contact member 20, though an opposite arrangement of ribs on the locating plates and indents of the moving contact is feasible.
  • the position of engagement for the toggle link 18 to the moving contact member 20 is conveniently provided via a recess in the latter to take the end of the link 18, conveniently a hole 40 into or through which that end can pass, with a shoulder or cross pin (see dot 42 in Figure 1 and dashed in Figure 3) to push the moving contact member shown.
  • a cross pin or further cross pin below the moving contact member can serve to assure positive action of the isolator switch relative to its moving contact member 20, see dashed in Figure 3 at 44.
  • Any other suitable positive retaining engagement between the link 18 and the moving contact member 20 can be used, for example pivotting the former to an upstand of the latter.
  • Embodiments hereof readily give breaks of several millimetres, say 6mm.

Landscapes

  • Mechanisms For Operating Contacts (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
EP86306865A 1985-09-06 1986-09-05 Interrupteur sectionneur électrique Withdrawn EP0214848A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB858522198A GB8522198D0 (en) 1985-09-06 1985-09-06 Electric isolator switch
GB8522198 1985-09-06

Publications (2)

Publication Number Publication Date
EP0214848A2 true EP0214848A2 (fr) 1987-03-18
EP0214848A3 EP0214848A3 (fr) 1988-10-05

Family

ID=10584844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86306865A Withdrawn EP0214848A3 (fr) 1985-09-06 1986-09-05 Interrupteur sectionneur électrique

Country Status (2)

Country Link
EP (1) EP0214848A3 (fr)
GB (2) GB8522198D0 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0367436A2 (fr) * 1988-10-15 1990-05-09 ASHLEY & ROCK LIMITED Disjoncteur électrique
AU781435B2 (en) * 2000-09-11 2005-05-26 Clipsal Australia Pty Ltd Improvements in and relating to a domestic electrical switch

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB800366A (en) * 1954-07-30 1958-08-27 Simplex Electric Co Ltd Improvements relating to contact arrangements for electrical switchgear
DE2346928A1 (de) * 1973-09-18 1975-07-31 Dreefs E Kg Kontaktsystem fuer drucktastenschalter
DE2508807A1 (de) * 1974-03-08 1975-09-11 Electrovac Schalteinrichtung
US3953697A (en) * 1973-11-28 1976-04-27 Teichert Allen L Dual fulcrum switch

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB514202A (en) * 1938-01-29 1939-11-02 George H Scholes & Co Ltd Improvements in or relating to electric switches for alternating current circuits
GB662373A (en) * 1949-06-22 1951-12-05 George H Scholes & Company Ltd Improvements relating to electric switches and contact arrangements therefor
GB688908A (en) * 1950-01-10 1953-03-18 Ashley Accessories Ltd Improvements in or relating to electric switches having a dolly or like pivoted operating member
GB672756A (en) * 1950-01-11 1952-05-28 Ashley Accessories Ltd Improvements in or relating to dolly operated electric switches
GB1265356A (fr) * 1969-10-21 1972-03-01
GB2145523A (en) * 1983-08-26 1985-03-27 Gte Valeron Corp Coatings for contacts of a touch probe
GB2148599A (en) * 1983-10-22 1985-05-30 Crabtree Electrical Ind Ltd Electric switches

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB800366A (en) * 1954-07-30 1958-08-27 Simplex Electric Co Ltd Improvements relating to contact arrangements for electrical switchgear
DE2346928A1 (de) * 1973-09-18 1975-07-31 Dreefs E Kg Kontaktsystem fuer drucktastenschalter
US3953697A (en) * 1973-11-28 1976-04-27 Teichert Allen L Dual fulcrum switch
DE2508807A1 (de) * 1974-03-08 1975-09-11 Electrovac Schalteinrichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0367436A2 (fr) * 1988-10-15 1990-05-09 ASHLEY & ROCK LIMITED Disjoncteur électrique
EP0367436A3 (fr) * 1988-10-15 1991-04-17 ASHLEY & ROCK LIMITED Disjoncteur électrique
AU781435B2 (en) * 2000-09-11 2005-05-26 Clipsal Australia Pty Ltd Improvements in and relating to a domestic electrical switch

Also Published As

Publication number Publication date
GB8621482D0 (en) 1986-10-15
GB2180404B (en) 1990-04-04
GB2180404A (en) 1987-03-25
EP0214848A3 (fr) 1988-10-05
GB8522198D0 (en) 1985-10-09

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Inventor name: CLIVES, STANLEY WILLIAM