NL7603479A - Current limiting trip switch - includes material expansible on heating to lift stud against spring force to separate circuit contacts - Google Patents

Current limiting trip switch - includes material expansible on heating to lift stud against spring force to separate circuit contacts

Info

Publication number
NL7603479A
NL7603479A NL7603479A NL7603479A NL7603479A NL 7603479 A NL7603479 A NL 7603479A NL 7603479 A NL7603479 A NL 7603479A NL 7603479 A NL7603479 A NL 7603479A NL 7603479 A NL7603479 A NL 7603479A
Authority
NL
Netherlands
Prior art keywords
heating
switch
current limiting
contacts
spring force
Prior art date
Application number
NL7603479A
Other languages
Dutch (nl)
Original Assignee
Hazemeijer Bv
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 Hazemeijer Bv filed Critical Hazemeijer Bv
Priority to NL7603479A priority Critical patent/NL7603479A/en
Publication of NL7603479A publication Critical patent/NL7603479A/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/04—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrothermal opening
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
    • H01H71/48—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts with provision for short-circuiting the electrical input to the release mechanism after release of the switch, e.g. for protection of heating wire

Landscapes

  • Thermally Actuated Switches (AREA)

Abstract

The current limiting safety switch has current passing from one terminal (13) via a fixed contact to a movable contact (10) through a material which expands on heating (4). On excessive flow, the expansion of the material (4) lifts the stud (9) against the force of spring (16) so separating the contacts (14, 15) which complete the circuit to the output terminal (B) the contacts latching open by the action of the latch (17). The plunger (9) also controls a shunt circuit via a short-circuiting switch (11) making contact with the body (1) of the switch which is in connection with the input terminal (A). This prevents damage to the switch by the overload current passing after the separation of the contacts until final cutoff on the zero transition of the AC power.
NL7603479A 1976-04-02 1976-04-02 Current limiting trip switch - includes material expansible on heating to lift stud against spring force to separate circuit contacts NL7603479A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7603479A NL7603479A (en) 1976-04-02 1976-04-02 Current limiting trip switch - includes material expansible on heating to lift stud against spring force to separate circuit contacts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7603479A NL7603479A (en) 1976-04-02 1976-04-02 Current limiting trip switch - includes material expansible on heating to lift stud against spring force to separate circuit contacts

Publications (1)

Publication Number Publication Date
NL7603479A true NL7603479A (en) 1977-10-04

Family

ID=19825934

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7603479A NL7603479A (en) 1976-04-02 1976-04-02 Current limiting trip switch - includes material expansible on heating to lift stud against spring force to separate circuit contacts

Country Status (1)

Country Link
NL (1) NL7603479A (en)

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