MX9700481A - Electrical power control system. - Google Patents

Electrical power control system.

Info

Publication number
MX9700481A
MX9700481A MX9700481A MX9700481A MX9700481A MX 9700481 A MX9700481 A MX 9700481A MX 9700481 A MX9700481 A MX 9700481A MX 9700481 A MX9700481 A MX 9700481A MX 9700481 A MX9700481 A MX 9700481A
Authority
MX
Mexico
Prior art keywords
winding
circuit
relay contact
power control
electrical power
Prior art date
Application number
MX9700481A
Other languages
Spanish (es)
Other versions
MXPA97000481A (en
Inventor
John Arthur Lawrence
Original Assignee
John Arthur Lawrence
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 John Arthur Lawrence filed Critical John Arthur Lawrence
Publication of MX9700481A publication Critical patent/MX9700481A/en
Publication of MXPA97000481A publication Critical patent/MXPA97000481A/en

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)
  • Relay Circuits (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Keying Circuit Devices (AREA)
  • Radio Relay Systems (AREA)
  • Stand-By Power Supply Arrangements (AREA)
  • Control Of Electrical Variables (AREA)
  • Circuit Arrangements For Discharge Lamps (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.
MXPA/A/1997/000481A 1994-07-20 1995-07-20 Electric energy control system MXPA97000481A (en)

Applications Claiming Priority (6)

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
GB94146651 1994-07-20
GB9414665.1 1994-07-20
GB95042826 1995-03-03
GB9504282.6 1995-03-03
GBGB9504282.6A GB9504282D0 (en) 1994-07-20 1995-03-03 Improvements in and relating to control systems for electrical circuits

Publications (2)

Publication Number Publication Date
MX9700481A true MX9700481A (en) 1998-10-31
MXPA97000481A MXPA97000481A (en) 1999-01-11

Family

ID=

Also Published As

Publication number Publication date
GB2307119B (en) 1998-05-27
AU700796B2 (en) 1999-01-14
CN1155967A (en) 1997-07-30
BR9508791A (en) 1997-12-30
CN1087585C (en) 2002-07-10
DE69507484D1 (en) 1999-03-04
JP3746295B2 (en) 2006-02-15
WO1996003018A1 (en) 1996-02-01
HK1011517A1 (en) 1999-07-09
CA2226498C (en) 2003-02-18
EP0771518A1 (en) 1997-05-07
JPH10504122A (en) 1998-04-14
DE69507484T2 (en) 1999-09-02
EP0771518B1 (en) 1999-01-20
NZ289906A (en) 1998-10-28
CA2226498A1 (en) 1996-02-01
ATE176118T1 (en) 1999-02-15
ES2129838T3 (en) 1999-06-16
GB9703695D0 (en) 1997-04-09
GB2307119A (en) 1997-05-14
AU2988495A (en) 1996-02-16

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