GB1124939A - Improvements in and relating to over-load relays - Google Patents

Improvements in and relating to over-load relays

Info

Publication number
GB1124939A
GB1124939A GB5494765A GB5494765A GB1124939A GB 1124939 A GB1124939 A GB 1124939A GB 5494765 A GB5494765 A GB 5494765A GB 5494765 A GB5494765 A GB 5494765A GB 1124939 A GB1124939 A GB 1124939A
Authority
GB
United Kingdom
Prior art keywords
lever
conditions
turn
metallic elements
switch
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
GB5494765A
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
Allmanna Svenska Elektriska 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, Allmanna Svenska Elektriska AB filed Critical ASEA AB
Publication of GB1124939A publication Critical patent/GB1124939A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H83/22—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages
    • H01H83/223—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages with bimetal elements

Landscapes

  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)
  • Special Spraying Apparatus (AREA)

Abstract

1,124,939. Protective arrangements. ALLMANNA SVENSKA ELEKTRISKA A.B. 28 Dec., 1965 [28 Dec., 1964], No. 54947/65. Heading H2K. [Also in Division H1] A polyphase overload protective device comprises a plurality of bi-metallic elements 16 . . . 18 (one shown) which act on a lever system formed by a first pivoted lever 34 and a second lever 32 pivoted on the first lever. Under balanced overload conditions, the bi-metallic elements 16. . . 18 are uniformly heated by heaters 20 ... 22 (one shown) and cause the first lever 34 to turn about its adjustable pivot until its upper end abuts an adjustable stop 44. Thereafter the bi-metallic elements cause the lever 32 to turn about its pivot 33 to operate a micro-switch 54. Under unbalanced overload conditions, the movement of the lever 34 is limited by the least heated bimetallic element abutting a stop member 46 on the lever 34. This enables the bi-metallic element with the greatest heating to turn the lever 32 to operate the switch 54 without having to move the lever 34, so that switch operation is effected at a lower current level under unbalanced conditions than under balanced conditions.
GB5494765A 1964-12-28 1965-12-28 Improvements in and relating to over-load relays Expired GB1124939A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1569864A SE301669B (en) 1964-12-28 1964-12-28

Publications (1)

Publication Number Publication Date
GB1124939A true GB1124939A (en) 1968-08-21

Family

ID=20301073

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5494765A Expired GB1124939A (en) 1964-12-28 1965-12-28 Improvements in and relating to over-load relays

Country Status (8)

Country Link
AT (1) AT266249B (en)
CH (1) CH428908A (en)
DE (1) DE1438909C3 (en)
DK (1) DK126810B (en)
GB (1) GB1124939A (en)
NL (2) NL6516899A (en)
NO (1) NO122196B (en)
SE (1) SE301669B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2342550A1 (en) * 1976-02-25 1977-09-23 Cutler Hammer World Trade Inc DOUBLE ACTION RELAY FOR PROTECTION OF A LOAD SUPPLIED WITH POLYPHASE CURRENT
DE3149811A1 (en) * 1981-12-16 1983-07-21 Klöckner-Moeller Elektrizitäts GmbH, 5300 Bonn Multi-phase thermally delayed motor protection switch
WO1986002197A1 (en) * 1984-09-26 1986-04-10 Licentia Patent-Verwaltungs-Gmbh Bimetallic trigger
GB2543812A (en) * 2015-10-30 2017-05-03 Long Men Tech Co Ltd High and ultra-high voltage circuit breaking system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2342550A1 (en) * 1976-02-25 1977-09-23 Cutler Hammer World Trade Inc DOUBLE ACTION RELAY FOR PROTECTION OF A LOAD SUPPLIED WITH POLYPHASE CURRENT
DE3149811A1 (en) * 1981-12-16 1983-07-21 Klöckner-Moeller Elektrizitäts GmbH, 5300 Bonn Multi-phase thermally delayed motor protection switch
WO1986002197A1 (en) * 1984-09-26 1986-04-10 Licentia Patent-Verwaltungs-Gmbh Bimetallic trigger
GB2543812A (en) * 2015-10-30 2017-05-03 Long Men Tech Co Ltd High and ultra-high voltage circuit breaking system
GB2543812B (en) * 2015-10-30 2020-01-01 Long Men Tech Co Ltd High and ultra-high voltage circuit breaking system

Also Published As

Publication number Publication date
DE1438909C3 (en) 1975-10-16
NL127861C (en)
DE1438909B2 (en) 1973-09-13
DE1438909A1 (en) 1968-11-21
SE301669B (en) 1968-06-17
CH428908A (en) 1967-01-31
DK126810B (en) 1973-08-20
NO122196B (en) 1971-06-01
AT266249B (en) 1968-11-11
NL6516899A (en) 1966-06-29

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