AU2988495A - Electrical power control system - Google Patents

Electrical power control system

Info

Publication number
AU2988495A
AU2988495A AU29884/95A AU2988495A AU2988495A AU 2988495 A AU2988495 A AU 2988495A AU 29884/95 A AU29884/95 A AU 29884/95A AU 2988495 A AU2988495 A AU 2988495A AU 2988495 A AU2988495 A AU 2988495A
Authority
AU
Australia
Prior art keywords
winding
circuit
relay contact
power control
electrical power
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.)
Granted
Application number
AU29884/95A
Other versions
AU700796B2 (en
Inventor
John Arthur Lawrence
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.)
Individual
Original Assignee
Individual
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
Priority claimed from GB9414665A external-priority patent/GB9414665D0/en
Application filed by Individual filed Critical Individual
Publication of AU2988495A publication Critical patent/AU2988495A/en
Application granted granted Critical
Publication of AU700796B2 publication Critical patent/AU700796B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/40—Controlling the intensity of light discontinuously
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/14—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Eletrric Generators (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Relay Circuits (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Keying Circuit Devices (AREA)
  • Radio Relay Systems (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Control Of Electrical Variables (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

The present invention relates to an electrical power control circuit for loads such as fluorescent lighting systems. A winding (3) has a positive end (13) connected to a positive rail (1) and is tapped at a predetermined position (18) for supplying an output terminal (T) with a selected voltage. A first relay contact (200A) can electrically connect a neutral end (14) of the winding to a neutral rail (2) to provide one selected voltage or a second relay contact (100A) can electrically short-circuit a predetermined number of turns of the winding in response to a request for a second selected voltage. When a fault condition is monitored, a third relay contact (300A) can electrically short-circuit the neutral end (14) of the winding to said predetermined position (18) to put the system into a failsafe condition which prevents turns of the winding being open circuit.
AU29884/95A 1994-07-20 1995-07-20 Electrical power control system Ceased AU700796B2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB9414665 1994-07-20
GB9414665A GB9414665D0 (en) 1994-07-20 1994-07-20 Improvements in and relating to control systems for electrical circuits
GB9504282 1995-03-03
GBGB9504282.6A GB9504282D0 (en) 1994-07-20 1995-03-03 Improvements in and relating to control systems for electrical circuits
PCT/GB1995/001729 WO1996003018A1 (en) 1994-07-20 1995-07-20 Electrical power control system

Publications (2)

Publication Number Publication Date
AU2988495A true AU2988495A (en) 1996-02-16
AU700796B2 AU700796B2 (en) 1999-01-14

Family

ID=26305306

Family Applications (1)

Application Number Title Priority Date Filing Date
AU29884/95A Ceased AU700796B2 (en) 1994-07-20 1995-07-20 Electrical power control system

Country Status (13)

Country Link
EP (1) EP0771518B1 (en)
JP (1) JP3746295B2 (en)
CN (1) CN1087585C (en)
AT (1) ATE176118T1 (en)
AU (1) AU700796B2 (en)
BR (1) BR9508791A (en)
CA (1) CA2226498C (en)
DE (1) DE69507484T2 (en)
ES (1) ES2129838T3 (en)
GB (1) GB2307119B (en)
HK (1) HK1011517A1 (en)
NZ (1) NZ289906A (en)
WO (1) WO1996003018A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9081039B2 (en) 2012-05-17 2015-07-14 GM Global Technology Operations LLC Vehicle electrical system fault detection
FR3070225B1 (en) * 2017-08-16 2019-09-20 Aksor AUTOMATIC TERMINAL
EP3975362A1 (en) * 2020-09-24 2022-03-30 Volvo Truck Corporation Safety circuit for a power system of a vehicle and method for controlling the safety circuit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4189664A (en) * 1977-10-05 1980-02-19 Hirschfeld Richard L Power control unit for automatic control of power consumption in a lighting load
US4201938A (en) * 1978-10-02 1980-05-06 Siemens-Allis, Inc. Voltage regulator which eliminates arcing during tap changes
US4237403A (en) * 1979-04-16 1980-12-02 Berkleonics, Inc. Power supply for fluorescent lamp
US4513224A (en) * 1982-09-22 1985-04-23 Pacific Power Control, Inc. Fluorescent-lighting-system voltage controller

Also Published As

Publication number Publication date
MX9700481A (en) 1998-10-31
BR9508791A (en) 1997-12-30
CN1155967A (en) 1997-07-30
EP0771518B1 (en) 1999-01-20
EP0771518A1 (en) 1997-05-07
WO1996003018A1 (en) 1996-02-01
ES2129838T3 (en) 1999-06-16
GB2307119B (en) 1998-05-27
ATE176118T1 (en) 1999-02-15
CA2226498C (en) 2003-02-18
NZ289906A (en) 1998-10-28
JP3746295B2 (en) 2006-02-15
GB9703695D0 (en) 1997-04-09
GB2307119A (en) 1997-05-14
JPH10504122A (en) 1998-04-14
DE69507484T2 (en) 1999-09-02
CA2226498A1 (en) 1996-02-01
DE69507484D1 (en) 1999-03-04
AU700796B2 (en) 1999-01-14
HK1011517A1 (en) 1999-07-09
CN1087585C (en) 2002-07-10

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