GB906594A - Improvements relating to overload protection devices - Google Patents

Improvements relating to overload protection devices

Info

Publication number
GB906594A
GB906594A GB1156359A GB1156359A GB906594A GB 906594 A GB906594 A GB 906594A GB 1156359 A GB1156359 A GB 1156359A GB 1156359 A GB1156359 A GB 1156359A GB 906594 A GB906594 A GB 906594A
Authority
GB
United Kingdom
Prior art keywords
armature
contacts
spring
contact member
phase
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
GB1156359A
Inventor
Sydney Arthur Stevens
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.)
Siemens Mobility Ltd
Original Assignee
Westinghouse Brake and Signal 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 Westinghouse Brake and Signal Co Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Priority to GB1156359A priority Critical patent/GB906594A/en
Priority to DEW27602A priority patent/DE1141013B/en
Publication of GB906594A publication Critical patent/GB906594A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H79/00—Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part

Abstract

906,594. Electrically-released switches; contact members for switches; protective arrangements. WESTINGHOUSE BRAKE & SIGNAL CO. Ltd. April 4, 1960 [April 6, 1959], No. 11563/59. Class 38 (5). A short-circuiting switch, e.g. for protecting germanium or silicon diode rectifiers, has a moving bridging contact member 1 normally held in the open position against the bias of a spring 3 by the armature 19 of an electromagnet or permanent magnet 20. On the energizing of a trip coil 22, the armature is released and the spring 3 impels the contact member 1 into engagement with resiliently mounted fixed contacts 4, 5 having damping means to prevent rebound. These contacts are pivoted on spurs R, Y extending from bus-bars (not shown), have their movement in one direction limited by adjusting screws 8, 9, and are damped by an assembly comprising a spider 16 slidable on a stud 14 and biased by bow-shaped laminar spring washers 12 with an interposed disc 13. Alternatively, hydraulic damping devices may be used and the spring 3 may comprise a stack of spring washers. The switch is brought into the open position manually or by momentary over-excitation of a holding coil 21. In a three-phase arrangement the contacts may comprise a disc 1 co-operating with three fixed contacts, though a bridging contact member connected to one phase may co-operate with fixed contacts connected to the other two phases. The contacts may be silver faced and gold plated. In the arrangement in which the armature is normally held by a permanent magnet, the armature and magnet may each comprise concentric rings of magnetic and non-magnetic material. If a holding coil 21 is used, it may be energized from a battery through a series resistor having a high positive temperature coefficient. The trip coil 22 may be energized from series-connected single-phase fullwave rectifiers each connected to a current transformer in one of the phases of the protected system, Fig. 2 (not shown).
GB1156359A 1959-04-06 1959-04-06 Improvements relating to overload protection devices Expired GB906594A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1156359A GB906594A (en) 1959-04-06 1959-04-06 Improvements relating to overload protection devices
DEW27602A DE1141013B (en) 1959-04-06 1960-04-04 Electromagnetic short-circuiter for high currents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1156359A GB906594A (en) 1959-04-06 1959-04-06 Improvements relating to overload protection devices

Publications (1)

Publication Number Publication Date
GB906594A true GB906594A (en) 1962-09-26

Family

ID=9988540

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1156359A Expired GB906594A (en) 1959-04-06 1959-04-06 Improvements relating to overload protection devices

Country Status (2)

Country Link
DE (1) DE1141013B (en)
GB (1) GB906594A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143678A (en) * 1983-05-24 1985-02-13 Adret Electronique A microwave transmission line element comprising one or more incorporated swithching members for inserting one or more quadripoles
US4876521A (en) * 1987-08-25 1989-10-24 Siemens Energy & Automation, Inc. Tripping coil with flux shifting coil and booster coil

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH299616A (en) * 1946-07-05 1954-06-15 Fkg Ag Switch cartridge.
DE853770C (en) * 1949-07-24 1952-10-27 Voigt & Haeffner Ag Damping pump for electrical switches
DE919123C (en) * 1951-09-12 1954-10-14 Licentia Gmbh Quick short-circuit for contact converter
GB748275A (en) * 1953-02-06 1956-04-25 English Electric Co Ltd Improvements relating to electrical rectifier circuits
CH315719A (en) * 1953-10-02 1956-08-31 Bbc Brown Boveri & Cie Device for protecting periodically moving electrical contact devices against interference from overcurrent or reverse current, in particular for contact converters
DE1059085B (en) * 1954-12-20 1959-06-11 Asea Ab Electromagnetically controlled compressed air locking device for short-circuit attempts

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143678A (en) * 1983-05-24 1985-02-13 Adret Electronique A microwave transmission line element comprising one or more incorporated swithching members for inserting one or more quadripoles
US4876521A (en) * 1987-08-25 1989-10-24 Siemens Energy & Automation, Inc. Tripping coil with flux shifting coil and booster coil

Also Published As

Publication number Publication date
DE1141013B (en) 1962-12-13

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