FR2412928A1 - Control circuit for gradual extinction of lighting - has phase controlled triac. with RC circuit and diode bridge connected in parallel to switch - Google Patents

Control circuit for gradual extinction of lighting - has phase controlled triac. with RC circuit and diode bridge connected in parallel to switch

Info

Publication number
FR2412928A1
FR2412928A1 FR7738974A FR7738974A FR2412928A1 FR 2412928 A1 FR2412928 A1 FR 2412928A1 FR 7738974 A FR7738974 A FR 7738974A FR 7738974 A FR7738974 A FR 7738974A FR 2412928 A1 FR2412928 A1 FR 2412928A1
Authority
FR
France
Prior art keywords
lighting
circuit
parallel
switch
diode bridge
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
FR7738974A
Other languages
French (fr)
Other versions
FR2412928B1 (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.)
Legrand SA
Original Assignee
Legrand SA
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 Legrand SA filed Critical Legrand SA
Priority to FR7738974A priority Critical patent/FR2412928A1/en
Publication of FR2412928A1 publication Critical patent/FR2412928A1/en
Application granted granted Critical
Publication of FR2412928B1 publication Critical patent/FR2412928B1/fr
Granted 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
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/02—Switching on, e.g. with predetermined rate of increase of lighting current

Landscapes

  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

The device is for controlled gradual extinction of lighting following switching out of the lighting circuit, normally for safety reasons. The control circuit (15) is connected in parallel across the lighting switch (12) in one power line. The parallel circuit is based on a phase controlled triac (19) or a pair of thyristors connected back to back in series with an anti-parasitic choke (30). Triggering of the triac is from a diode bridge (27) and a phase shifting RC (21, 22) potentiometer via a diac (25) or a gas filled tube controlling the trigger threshold. The delayed switch-off occurs due to the discharge time of a CR pair (26, 28) across the bridge.
FR7738974A 1977-12-23 1977-12-23 Control circuit for gradual extinction of lighting - has phase controlled triac. with RC circuit and diode bridge connected in parallel to switch Granted FR2412928A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7738974A FR2412928A1 (en) 1977-12-23 1977-12-23 Control circuit for gradual extinction of lighting - has phase controlled triac. with RC circuit and diode bridge connected in parallel to switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7738974A FR2412928A1 (en) 1977-12-23 1977-12-23 Control circuit for gradual extinction of lighting - has phase controlled triac. with RC circuit and diode bridge connected in parallel to switch

Publications (2)

Publication Number Publication Date
FR2412928A1 true FR2412928A1 (en) 1979-07-20
FR2412928B1 FR2412928B1 (en) 1980-07-18

Family

ID=9199271

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7738974A Granted FR2412928A1 (en) 1977-12-23 1977-12-23 Control circuit for gradual extinction of lighting - has phase controlled triac. with RC circuit and diode bridge connected in parallel to switch

Country Status (1)

Country Link
FR (1) FR2412928A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094166A1 (en) * 1982-05-10 1983-11-16 Delmatic Limited Lighting control system
WO2024088054A1 (en) * 2022-10-27 2024-05-02 厦门宏发电力电器有限公司 Relay, control device and control circuit module

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094166A1 (en) * 1982-05-10 1983-11-16 Delmatic Limited Lighting control system
US4508997A (en) * 1982-05-10 1985-04-02 Delmatic Limited Lighting control system
WO2024088054A1 (en) * 2022-10-27 2024-05-02 厦门宏发电力电器有限公司 Relay, control device and control circuit module

Also Published As

Publication number Publication date
FR2412928B1 (en) 1980-07-18

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Legal Events

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ST Notification of lapse