NZ289906A - Power control circuit for fluorescent lamp, starting and operating modes provided by switched taps on transformer winding - Google Patents
Power control circuit for fluorescent lamp, starting and operating modes provided by switched taps on transformer windingInfo
- Publication number
- NZ289906A NZ289906A NZ289906A NZ28990695A NZ289906A NZ 289906 A NZ289906 A NZ 289906A NZ 289906 A NZ289906 A NZ 289906A NZ 28990695 A NZ28990695 A NZ 28990695A NZ 289906 A NZ289906 A NZ 289906A
- Authority
- NZ
- New Zealand
- Prior art keywords
- winding
- power control
- control circuit
- starting
- fluorescent lamp
- Prior art date
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)
- 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.
Applications Claiming Priority (3)
| 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 |
| PCT/GB1995/001729 WO1996003018A1 (en) | 1994-07-20 | 1995-07-20 | Electrical power control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NZ289906A true NZ289906A (en) | 1998-10-28 |
Family
ID=26305306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NZ289906A NZ289906A (en) | 1994-07-20 | 1995-07-20 | Power control circuit for fluorescent lamp, starting and operating modes provided by switched taps on transformer winding |
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)
| 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)
| 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 |
-
1995
- 1995-07-20 EP EP95925944A patent/EP0771518B1/en not_active Expired - Lifetime
- 1995-07-20 JP JP50484196A patent/JP3746295B2/en not_active Expired - Fee Related
- 1995-07-20 AT AT95925944T patent/ATE176118T1/en not_active IP Right Cessation
- 1995-07-20 AU AU29884/95A patent/AU700796B2/en not_active Ceased
- 1995-07-20 NZ NZ289906A patent/NZ289906A/en unknown
- 1995-07-20 CN CN95194706A patent/CN1087585C/en not_active Expired - Fee Related
- 1995-07-20 GB GB9703695A patent/GB2307119B/en not_active Revoked
- 1995-07-20 DE DE69507484T patent/DE69507484T2/en not_active Expired - Fee Related
- 1995-07-20 WO PCT/GB1995/001729 patent/WO1996003018A1/en active IP Right Grant
- 1995-07-20 ES ES95925944T patent/ES2129838T3/en not_active Expired - Lifetime
- 1995-07-20 BR BR9508791A patent/BR9508791A/en not_active IP Right Cessation
- 1995-07-20 CA CA002226498A patent/CA2226498C/en not_active Expired - Fee Related
-
1998
- 1998-11-14 HK HK98112015A patent/HK1011517A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE69507484T2 (en) | 1999-09-02 |
| JPH10504122A (en) | 1998-04-14 |
| CA2226498C (en) | 2003-02-18 |
| ATE176118T1 (en) | 1999-02-15 |
| AU700796B2 (en) | 1999-01-14 |
| JP3746295B2 (en) | 2006-02-15 |
| CN1087585C (en) | 2002-07-10 |
| CN1155967A (en) | 1997-07-30 |
| EP0771518B1 (en) | 1999-01-20 |
| GB9703695D0 (en) | 1997-04-09 |
| GB2307119B (en) | 1998-05-27 |
| MX9700481A (en) | 1998-10-31 |
| AU2988495A (en) | 1996-02-16 |
| CA2226498A1 (en) | 1996-02-01 |
| ES2129838T3 (en) | 1999-06-16 |
| DE69507484D1 (en) | 1999-03-04 |
| EP0771518A1 (en) | 1997-05-07 |
| BR9508791A (en) | 1997-12-30 |
| HK1011517A1 (en) | 1999-07-09 |
| WO1996003018A1 (en) | 1996-02-01 |
| GB2307119A (en) | 1997-05-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RENW | Renewal (renewal fees accepted) | ||
| RENW | Renewal (renewal fees accepted) |