HK27395A - Rapid pressure rise circuit - Google Patents

Rapid pressure rise circuit

Info

Publication number
HK27395A
HK27395A HK27395A HK27395A HK27395A HK 27395 A HK27395 A HK 27395A HK 27395 A HK27395 A HK 27395A HK 27395 A HK27395 A HK 27395A HK 27395 A HK27395 A HK 27395A
Authority
HK
Hong Kong
Prior art keywords
pressure rise
rapid pressure
response
control circuit
rise circuit
Prior art date
Application number
HK27395A
Other languages
English (en)
Inventor
Richard E Hagerman
Joseph F Foster
Original Assignee
Qualitrol Corp
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 Qualitrol Corp filed Critical Qualitrol Corp
Publication of HK27395A publication Critical patent/HK27395A/xx

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Protection Of Transformers (AREA)
  • Transformer Cooling (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Measuring Fluid Pressure (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Surgical Instruments (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
HK27395A 1988-01-21 1995-03-02 Rapid pressure rise circuit HK27395A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/146,376 US4823224A (en) 1988-01-21 1988-01-21 Rapid pressure rise circuit
PCT/US1989/000106 WO1989006873A1 (fr) 1988-01-21 1989-01-12 Circuit detecteur d'une augmentation rapide de la pression

Publications (1)

Publication Number Publication Date
HK27395A true HK27395A (en) 1995-03-10

Family

ID=22517096

Family Applications (1)

Application Number Title Priority Date Filing Date
HK27395A HK27395A (en) 1988-01-21 1995-03-02 Rapid pressure rise circuit

Country Status (13)

Country Link
US (1) US4823224A (fr)
EP (1) EP0398974B1 (fr)
JP (1) JPH03503353A (fr)
AT (1) ATE102762T1 (fr)
CA (1) CA1314968C (fr)
DE (1) DE68913726T2 (fr)
DK (1) DK223990A (fr)
ES (1) ES2010093A6 (fr)
GR (1) GR1000644B (fr)
HK (1) HK27395A (fr)
IE (1) IE63247B1 (fr)
PT (1) PT89487B (fr)
WO (1) WO1989006873A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0667112B2 (ja) 1990-01-09 1994-08-24 日新電機株式会社 ガス絶縁式電気設備の通電異常監視装置
FR2663796B1 (fr) * 1990-06-26 1996-08-23 Aupem Boitier de securite pour enseigne haute tension.
FR2684248B1 (fr) * 1991-11-22 1997-04-30 Pioch Sa Appareil electronique de mesure et de protection du fonctionnement du transformateur a huile.
DE59600566D1 (de) * 1996-01-05 1998-10-22 Juergen Bastian Überwachung der Spaltgasbildung in Transformatoren
US6031462A (en) * 1998-11-03 2000-02-29 Fike Corporation Rate of rise detector for use with explosion detection suppression equipment
US6494617B1 (en) 1999-04-30 2002-12-17 General Electric Company Status detection apparatus and method for fluid-filled electrical equipment
US6401518B1 (en) 1999-07-29 2002-06-11 General Electric Company Fluid filled electrical device with diagnostic sensor located in fluid circulation flow path
US6429662B1 (en) * 2000-06-14 2002-08-06 Ifd Corporation Internal fault indicator for power electrical devices
US7111637B2 (en) * 2003-12-19 2006-09-26 Qualitrol Corporation Enclosure system for pressure relief device
US7210497B2 (en) * 2003-12-19 2007-05-01 Qualitrol Corporation Pressure relief device with increased flow rate
US7965486B2 (en) * 2006-10-24 2011-06-21 The Johns Hopkins University Arc flash detection system
CN102939521B (zh) 2010-06-07 2014-10-15 Ifd内部故障探测器公司 用于电气设备的内部故障指示器
CA2976285A1 (fr) 2015-02-23 2016-09-01 Ifd Internal Fault Detector Corp. Appareil de surveillance de defaillance integre pour equipement electrique
DE102015220162A1 (de) * 2015-10-16 2017-04-20 Robert Bosch Gmbh Steuergerät für ein Fahrzeug mit einem Lichtbogensensor
MX2018016218A (es) 2016-06-28 2019-08-29 Qualitrol Co Llc Sistema de detección y administración de aumento rápido de presión.
CN109713640B (zh) * 2019-02-28 2019-11-26 西安交通大学 基于压力特征的油浸式变压器数字式非电量保护方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3914667A (en) * 1972-03-27 1975-10-21 Ite Imperial Corp Rate of rise tripping device
US4001644A (en) * 1975-03-27 1977-01-04 Westinghouse Electric Corporation Sudden pressure relay having seismic protection
JPS5419594A (en) * 1977-07-12 1979-02-14 Morita Mfg Method of lubricating dental hand piece and small oiler used therefor
US4218716A (en) * 1977-10-14 1980-08-19 General Electric Company Programmable fault detecting relay for a transformer
US4297738A (en) * 1979-10-29 1981-10-27 Electric Power Research Institute, Inc. Apparatus for and method of detecting high impedance faults on distribution circuits with delta connected loads
JPS56123733A (en) * 1980-03-05 1981-09-29 Hitachi Ltd Internal accident detector in oillimmersed electric device
US4297241A (en) * 1980-03-21 1981-10-27 Union Carbide Corporation Method of preparing an olefin hydration catalyst
US4441056A (en) * 1980-06-05 1984-04-03 Unicorn Electrical Products High pressure sodium lamp ballast circuit
US4376243A (en) * 1981-01-26 1983-03-08 General Motors Corporation Arc detector for electric rod furnace
GB2149594A (en) * 1983-11-09 1985-06-12 Smidth & Co As F L Fast-acting spark-over detector
US4654806A (en) * 1984-03-30 1987-03-31 Westinghouse Electric Corp. Method and apparatus for monitoring transformers
JPS6111054A (ja) * 1984-06-25 1986-01-18 三菱レイヨン株式会社 血液浄化システム

Also Published As

Publication number Publication date
DE68913726T2 (de) 1994-06-23
WO1989006873A1 (fr) 1989-07-27
PT89487B (pt) 1994-02-28
IE890171L (en) 1989-07-21
ATE102762T1 (de) 1994-03-15
IE63247B1 (en) 1995-04-05
US4823224A (en) 1989-04-18
DK223990D0 (da) 1990-09-18
DE68913726D1 (de) 1994-04-14
JPH03503353A (ja) 1991-07-25
ES2010093A6 (es) 1989-10-16
GR1000644B (el) 1992-09-11
EP0398974B1 (fr) 1994-03-09
EP0398974A1 (fr) 1990-11-28
EP0398974A4 (en) 1991-11-13
CA1314968C (fr) 1993-03-23
DK223990A (da) 1990-09-18
PT89487A (pt) 1989-10-04

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Legal Events

Date Code Title Description
PF Patent in force
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20050112