ATE399384T1 - IMPROVED BUCHHOLZ RELAY - Google Patents

IMPROVED BUCHHOLZ RELAY

Info

Publication number
ATE399384T1
ATE399384T1 AT99104014T AT99104014T ATE399384T1 AT E399384 T1 ATE399384 T1 AT E399384T1 AT 99104014 T AT99104014 T AT 99104014T AT 99104014 T AT99104014 T AT 99104014T AT E399384 T1 ATE399384 T1 AT E399384T1
Authority
AT
Austria
Prior art keywords
buchholz relay
improved
type
flap
frame
Prior art date
Application number
AT99104014T
Other languages
German (de)
Inventor
Lago Silvio Dal
Original Assignee
Comem Spa
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 Comem Spa filed Critical Comem Spa
Application granted granted Critical
Publication of ATE399384T1 publication Critical patent/ATE399384T1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/40—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by devices allowing continual flow of fluid, e.g. vane
    • H01H35/405—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by devices allowing continual flow of fluid, e.g. vane the switch being of the reed switch type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/55—Oil reservoirs or tanks; Lowering means therefor
    • H01H33/555—Protective arrangements responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/40—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by devices allowing continual flow of fluid, e.g. vane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/02—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding actuated by movement of a float carrying a magnet

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)
  • Organic Insulating Materials (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

A Buchholz relay comprising, to be immersed in an oil bath, a supporting frame (25) for magnetic switches (29) for closing circuits which are operated by movable devices (32,33), of which at least one (32) is of the floater type and at least one (33) is of the type with a flap rotatably associated with the frame (25). The flap device, which has a surface which is sensitive to the presence of oil currents, is independent of the floaters (32). <IMAGE>
AT99104014T 1998-03-19 1999-03-12 IMPROVED BUCHHOLZ RELAY ATE399384T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT98PD000059A ITPD980059A1 (en) 1998-03-19 1998-03-19 BUCHHOLZ TYPE PERFECTED RELAY

Publications (1)

Publication Number Publication Date
ATE399384T1 true ATE399384T1 (en) 2008-07-15

Family

ID=11392109

Family Applications (1)

Application Number Title Priority Date Filing Date
AT99104014T ATE399384T1 (en) 1998-03-19 1999-03-12 IMPROVED BUCHHOLZ RELAY

Country Status (5)

Country Link
EP (1) EP0944150B1 (en)
AT (1) ATE399384T1 (en)
DE (1) DE69938946D1 (en)
ES (1) ES2310020T3 (en)
IT (1) ITPD980059A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002100385B4 (en) * 2002-05-15 2002-06-20 John Owen Williams Modified buchholz relay for continuous monitoring of gas generated by transformer internal faults
ITVI20070223A1 (en) * 2007-08-07 2009-02-08 Comem Spa BUCHHOLZ RELAY FOR THE PROTECTION OF ELECTRIC POWER EQUIPMENT INSULATED IN OIL.
WO2013013703A1 (en) * 2011-07-25 2013-01-31 Abb Technology Ag Safety apparatus and monitoring method for a power transformer, and related power transformer
EP2669910B1 (en) * 2012-05-31 2015-07-01 ABB Technology AG Safety device for electrical transformers and related electrical transformer
CN104134576A (en) * 2014-07-16 2014-11-05 国家电网公司 Three-pin reed switch type double-circuit trip node gas relay
EP3098827B1 (en) * 2015-05-26 2018-10-17 ABB Schweiz AG Flow vent adjustable system for buchholz relay
CN113327819A (en) * 2021-06-25 2021-08-31 沈阳明远电气科技有限公司 Gas relay volume pre-alarming device and method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2952753A (en) * 1958-06-27 1960-09-13 Mcdonnell & Miller Inc Flow switch
ES324856A1 (en) * 1965-03-30 1967-02-16 Licentia Patent-Verwaltungs G M B H Surveillance and disconnection system for electrical appliances with liquid insulation. (Machine-translation by Google Translate, not legally binding)
US4282413A (en) * 1979-07-02 1981-08-04 Grunau Company, Inc. Liquid flow indicator
DD207645A3 (en) * 1982-02-04 1984-03-07 Dietrich Kroll STORAGE FLAP FOR PROTECTIVE EQUIPMENT

Also Published As

Publication number Publication date
EP0944150A3 (en) 2000-06-07
EP0944150B1 (en) 2008-06-25
ES2310020T3 (en) 2008-12-16
EP0944150A2 (en) 1999-09-22
DE69938946D1 (en) 2008-08-07
ITPD980059A1 (en) 1999-09-19

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Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties