GB9703695D0 - Electrical power control system - Google Patents

Electrical power control system

Info

Publication number
GB9703695D0
GB9703695D0 GBGB9703695.8A GB9703695A GB9703695D0 GB 9703695 D0 GB9703695 D0 GB 9703695D0 GB 9703695 A GB9703695 A GB 9703695A GB 9703695 D0 GB9703695 D0 GB 9703695D0
Authority
GB
United Kingdom
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
GBGB9703695.8A
Other versions
GB2307119B (en
GB2307119A (en
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.)
LAWRENCE JOHN A
Original Assignee
LAWRENCE JOHN A
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 LAWRENCE JOHN A filed Critical LAWRENCE JOHN A
Priority to GB9703695A priority Critical patent/GB2307119B/en
Publication of GB9703695D0 publication Critical patent/GB9703695D0/en
Publication of GB2307119A publication Critical patent/GB2307119A/en
Application granted granted Critical
Publication of GB2307119B publication Critical patent/GB2307119B/en
Anticipated expiration legal-status Critical
Revoked 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)
  • Supply And Distribution Of Alternating Current (AREA)
  • Relay Circuits (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Keying Circuit Devices (AREA)
  • Radio Relay Systems (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.
GB9703695A 1994-07-20 1995-07-20 Electrical power control system Revoked GB2307119B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9703695A GB2307119B (en) 1994-07-20 1995-07-20 Electrical power control system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9414665A GB9414665D0 (en) 1994-07-20 1994-07-20 Improvements in and relating to control systems for electrical circuits
GBGB9504282.6A GB9504282D0 (en) 1994-07-20 1995-03-03 Improvements in and relating to control systems for electrical circuits
GB9703695A GB2307119B (en) 1994-07-20 1995-07-20 Electrical power control system
PCT/GB1995/001729 WO1996003018A1 (en) 1994-07-20 1995-07-20 Electrical power control system

Publications (3)

Publication Number Publication Date
GB9703695D0 true GB9703695D0 (en) 1997-04-09
GB2307119A GB2307119A (en) 1997-05-14
GB2307119B GB2307119B (en) 1998-05-27

Family

ID=26305306

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9703695A Revoked GB2307119B (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
DE69507484T2 (en) 1999-09-02
AU700796B2 (en) 1999-01-14
DE69507484D1 (en) 1999-03-04
CA2226498C (en) 2003-02-18
CN1087585C (en) 2002-07-10
CN1155967A (en) 1997-07-30
AU2988495A (en) 1996-02-16
GB2307119B (en) 1998-05-27
EP0771518B1 (en) 1999-01-20
CA2226498A1 (en) 1996-02-01
ATE176118T1 (en) 1999-02-15
NZ289906A (en) 1998-10-28
BR9508791A (en) 1997-12-30
EP0771518A1 (en) 1997-05-07
JP3746295B2 (en) 2006-02-15
JPH10504122A (en) 1998-04-14
WO1996003018A1 (en) 1996-02-01
ES2129838T3 (en) 1999-06-16
HK1011517A1 (en) 1999-07-09
GB2307119A (en) 1997-05-14

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20030720

773K Patent revoked under sect. 73(2)/1977

Free format text: PATENT REVOKED ON 20040610