GB1401552A - Emergency supply circuit - Google Patents

Emergency supply circuit

Info

Publication number
GB1401552A
GB1401552A GB834873A GB834873A GB1401552A GB 1401552 A GB1401552 A GB 1401552A GB 834873 A GB834873 A GB 834873A GB 834873 A GB834873 A GB 834873A GB 1401552 A GB1401552 A GB 1401552A
Authority
GB
United Kingdom
Prior art keywords
voltage
transistor
power source
battery
lamp
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.)
Expired
Application number
GB834873A
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.)
SAFT Societe des Accumulateurs Fixes et de Traction SA
Original Assignee
SAFT Societe des Accumulateurs Fixes et de Traction 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 SAFT Societe des Accumulateurs Fixes et de Traction SA filed Critical SAFT Societe des Accumulateurs Fixes et de Traction SA
Publication of GB1401552A publication Critical patent/GB1401552A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • H02J9/065—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads for lighting purposes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stand-By Power Supply Arrangements (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

1401552 Emergency lighting circuits; standby supply circuits SAFT-SOC DES ACCUMULATEURS FIXES ET DE TRACTION 20 Feb 1973 [23 Feb 1972] 8348/73 Heading H2H An emergency supply circuit comprises a main power source 2, an auxiliary power source 1 for providing an adjustable reference voltage, a comparator circuit 7 for comparing a voltage derived from the main power source with the reference voltage and a switching device T 4 responsive to the output of the comparator circuit to enable the auxiliary power source to supply a load 12 when the voltage derived from the main power source falls below a threshold voltage set by the reference voltage. The voltage across a capacitor C1 is proportional to the main source voltage and is compared with the reference voltage provided by the tapping point 5 of a battery 1. When the mains voltage is normal, a transistor T1 is conductive and the conduction of a transistor T2 maintains a transistor T3 and consequently a transistor T4 non-conductive. Terminals A, C are therefore not connected and the fluorescent lamp load 12 is not illuminated. In the event of a decrease of the mains voltage below the threshold voltage, the change in state of the transistors T1-T4 enables the connection of the terminals A, C so that the battery 1 supplies power to illuminate the lamp 12. In a modification, the terminals A, C are permanently connected and the mains voltage energizes the lamp but on failure of the mains voltage, the battery connection to the terminal B is established via a transistor to enable the battery to energize the lamp.
GB834873A 1972-02-23 1973-02-20 Emergency supply circuit Expired GB1401552A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7206085A FR2172817B1 (en) 1972-02-23 1972-02-23

Publications (1)

Publication Number Publication Date
GB1401552A true GB1401552A (en) 1975-07-16

Family

ID=9093978

Family Applications (1)

Application Number Title Priority Date Filing Date
GB834873A Expired GB1401552A (en) 1972-02-23 1973-02-20 Emergency supply circuit

Country Status (5)

Country Link
BE (1) BE795287A (en)
DE (1) DE2306450A1 (en)
ES (1) ES411910A1 (en)
FR (1) FR2172817B1 (en)
GB (1) GB1401552A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2248984A (en) * 1990-10-19 1992-04-22 Power Standby Systems Limited An emergency light circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3138512A1 (en) * 1981-09-28 1983-04-07 Willing, Achim, Dipl.-Ing. Dr.-Ing., 1000 Berlin Circuit arrangement for emergency power supplies

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1492820A (en) * 1965-12-29 1967-08-25 Accumulateurs Fixes Ultra-fast switching device operating in direct or rectified alternating current, more particularly to substitute one power supply for another

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2248984A (en) * 1990-10-19 1992-04-22 Power Standby Systems Limited An emergency light circuit
GB2248984B (en) * 1990-10-19 1994-05-04 Power Standby Systems Limited An emergency light circuit

Also Published As

Publication number Publication date
ES411910A1 (en) 1976-01-01
FR2172817A1 (en) 1973-10-05
DE2306450A1 (en) 1973-08-30
BE795287A (en) 1973-08-13
FR2172817B1 (en) 1974-12-13

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees