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GB1401488A - Method and installation for uninterrupted supply of alternating current to a load - Google Patents

Method and installation for uninterrupted supply of alternating current to a load

Info

Publication number
GB1401488A
GB1401488A GB5346972A GB5346972A GB1401488A GB 1401488 A GB1401488 A GB 1401488A GB 5346972 A GB5346972 A GB 5346972A GB 5346972 A GB5346972 A GB 5346972A GB 1401488 A GB1401488 A GB 1401488A
Authority
GB
United Kingdom
Prior art keywords
load
voltage
circuit
sources
source
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
GB5346972A
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.)
DELECTRONIQUE IND LEPAUTE COMP
Original Assignee
DELECTRONIQUE IND LEPAUTE COMP
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 DELECTRONIQUE IND LEPAUTE COMP filed Critical DELECTRONIQUE IND LEPAUTE COMP
Publication of GB1401488A publication Critical patent/GB1401488A/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
    • H02J9/061—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 DC powered loads

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Logic Circuits (AREA)
  • Ac-Ac Conversion (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

1401488 No break A.C. supply systems COMPAGNIE GENERALE D'ELECTRONIQUE INDUSTRIELLE LEPAUTE 20 Nov 1972 [18 Nov 1971] 53469/72 Heading H2H A circuit for supplying uninterrupted A.C. to a load 1 comprises A.C. sources 2, 3 connectible to the load via inverse parallel connected thyristors 43, 44 and 45, 46, circuits 61-63 and 71-73 for monitoring the voltage between points A, B<SP>1</SP> and A, O<SP>1</SP> respectively, a circuit 81-83 for monitoring the voltage across the load and a logic circuit 5 for controlling the thyristors to connect one of the sources to the load if the monitor circuits detect that both sources are simultaneously disconnected from the load or to change the source if the load voltage remains lower than a predetermined voltage V for longer than a predetermined time. One of the sources 2, 3 may be a D.C. source connected to an inverter whilst the other source is the supply network. Each monitor circuit includes a pair of Zener diodes and a resistor, and the voltages between the points A, B<SP>1</SP>, A, C<SP>1</SP> and A, D<SP>1</SP> are fed to respective first operational amplifiers in the circuit 5. Further operational amplifiers connected to each of the first operational amplifiers compare the voltages V B <SP>1</SP>-V A , V C <SP>1</SP>-V A , and V D <SP>1</SP>-V A with a reference voltage V to provide logical 1 or 0 signals to a system of NAND gates. A delay circuit, connected to the portion of the logic circuit which monitors the voltage across the load, establishes the predetermined time. If the logic circuit detects that both sources are disconnected from the load, a 20 kHz. signal from an oscillator is gated to a transistor amplifier circuit to enable firing of the thyristors associated with the previously redundant source. Similarly if the load voltage is less than the reference voltage for a period of time greater than the predetermined time established by the delay circuit, the thyristors associated with the previously redundant source will be fired.
GB5346972A 1971-11-18 1972-11-20 Method and installation for uninterrupted supply of alternating current to a load Expired GB1401488A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7141358A FR2161253A5 (en) 1971-11-18 1971-11-18

Publications (1)

Publication Number Publication Date
GB1401488A true GB1401488A (en) 1975-07-16

Family

ID=9085997

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5346972A Expired GB1401488A (en) 1971-11-18 1972-11-20 Method and installation for uninterrupted supply of alternating current to a load

Country Status (7)

Country Link
BE (1) BE791178A (en)
DE (1) DE2256251A1 (en)
ES (1) ES408771A1 (en)
FR (1) FR2161253A5 (en)
GB (1) GB1401488A (en)
IT (1) IT975771B (en)
NL (1) NL7215567A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5182464A (en) * 1991-01-09 1993-01-26 Techmatics, Inc. High speed transfer switch
WO2014158065A1 (en) * 2013-03-27 2014-10-02 Flexenclosure Ab (Publ) Power supply apparatus with controllable multiple input rectification

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065676A (en) * 1976-06-02 1977-12-27 Honeywell Inc. Battery backup for AC powered DC supply
FR2420866A1 (en) * 1978-03-20 1979-10-19 Accumulateurs Fixes PROCESS AND DEVICE FOR ALTERNATING CURRENT AND DIRECT CURRENT POWER SUPPLY
DE3173422D1 (en) * 1981-04-30 1986-02-20 Michele Cerciello Control circuit for a device to commute from one alternating voltage to another
CH677994A5 (en) * 1984-07-12 1991-07-15 Schweizer Ag Karl Rack for slide=in units coupled to three=phase supply
CN108512399B (en) * 2018-05-23 2023-09-29 成都四威功率电子科技有限公司 Enabling control circuit for switching power supply

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5182464A (en) * 1991-01-09 1993-01-26 Techmatics, Inc. High speed transfer switch
WO2014158065A1 (en) * 2013-03-27 2014-10-02 Flexenclosure Ab (Publ) Power supply apparatus with controllable multiple input rectification
US10186868B2 (en) 2013-03-27 2019-01-22 Flexenclosure Ab (Publ) Power supply apparatus with controllable multiple input rectification

Also Published As

Publication number Publication date
IT975771B (en) 1974-08-10
FR2161253A5 (en) 1973-07-06
DE2256251A1 (en) 1973-05-24
BE791178A (en) 1973-05-10
NL7215567A (en) 1973-05-22
ES408771A1 (en) 1975-11-01

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Legal Events

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