SE8001198L - ELECTRICAL APPLIANCE - Google Patents

ELECTRICAL APPLIANCE

Info

Publication number
SE8001198L
SE8001198L SE8001198A SE8001198A SE8001198L SE 8001198 L SE8001198 L SE 8001198L SE 8001198 A SE8001198 A SE 8001198A SE 8001198 A SE8001198 A SE 8001198A SE 8001198 L SE8001198 L SE 8001198L
Authority
SE
Sweden
Prior art keywords
operating point
spring device
activation
contact
force
Prior art date
Application number
SE8001198A
Other languages
Swedish (sv)
Other versions
SE434320B (en
Inventor
R Nordgren
Original Assignee
Asea Ab
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 Asea Ab filed Critical Asea Ab
Priority to SE8001198A priority Critical patent/SE434320B/en
Publication of SE8001198L publication Critical patent/SE8001198L/en
Publication of SE434320B publication Critical patent/SE434320B/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members

Abstract

Electrical apparatus, for example thermal overload relay, thermostat or the like, consisting of at least one contact 1, 3 which is subject to the effect of a snap spring device 20, 21, 24. A trigger mechanism with at least one thermal activation means 10, for example a bimetal element, brings about automatic activation of the apparatus in the event of, for example, excess current by pressure on an operating point 12 of the snap spring device. This spring device is so arranged that when the operating point is depressed it provides reducing counter force. The trigger mechanism contains at least one sprung means 30 and has lower spring constant at the operating point 12 than the snap spring device. When the apparatus is activated, the operating point lies stable in the initial position until the trigger force is achieved, whereupon it is moved instantaneously the whole activation distance before the contact 1, 3 breaks. By this means, a constant contact force is obtained in spite of a very slow operating movement of the activation means 10. <IMAGE>
SE8001198A 1980-02-15 1980-02-15 Electrical apparatus, for example thermal overload relay SE434320B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE8001198A SE434320B (en) 1980-02-15 1980-02-15 Electrical apparatus, for example thermal overload relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8001198A SE434320B (en) 1980-02-15 1980-02-15 Electrical apparatus, for example thermal overload relay

Publications (2)

Publication Number Publication Date
SE8001198L true SE8001198L (en) 1981-08-16
SE434320B SE434320B (en) 1984-07-16

Family

ID=20340259

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8001198A SE434320B (en) 1980-02-15 1980-02-15 Electrical apparatus, for example thermal overload relay

Country Status (1)

Country Link
SE (1) SE434320B (en)

Also Published As

Publication number Publication date
SE434320B (en) 1984-07-16

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