GB977913A - Improvements in or relating to electrical apparatus and systems - Google Patents

Improvements in or relating to electrical apparatus and systems

Info

Publication number
GB977913A
GB977913A GB1071762A GB1071762A GB977913A GB 977913 A GB977913 A GB 977913A GB 1071762 A GB1071762 A GB 1071762A GB 1071762 A GB1071762 A GB 1071762A GB 977913 A GB977913 A GB 977913A
Authority
GB
United Kingdom
Prior art keywords
zener diodes
march
lines
relating
systems
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
GB1071762A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1071762A priority Critical patent/GB977913A/en
Publication of GB977913A publication Critical patent/GB977913A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/08—Regulating voltage or current wherein the variable is dc
    • G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
    • G05F3/18—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using Zener diodes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/008—Intrinsically safe circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Amplifiers (AREA)

Abstract

977,913. Protective arrangements. R. J. REDDING. March 19, 1963 [March 20, 1962], No. 10717/62. Heading H2H. [Also in Division G3] A circuit arrangement wherein means are provided so as to limit the power transmitted therethrough to an intrinsically safe value comprises two Zener diodes Z1, Z2 connected in serially opposed relationship between the two lines 11, 12 of the circuit, each of the lines having a current limiting resistor R1, R2 connected in series therewith. Fuses F1, F2 may also be connected in each line and the connection between the two Zener diodes may be earthed. Additionally, two opposed Zener diodes may be connected between the connection between the Zener diodes Z1, Z2 and earth.
GB1071762A 1962-03-20 1962-03-20 Improvements in or relating to electrical apparatus and systems Expired GB977913A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1071762A GB977913A (en) 1962-03-20 1962-03-20 Improvements in or relating to electrical apparatus and systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1071762A GB977913A (en) 1962-03-20 1962-03-20 Improvements in or relating to electrical apparatus and systems

Publications (1)

Publication Number Publication Date
GB977913A true GB977913A (en) 1964-12-16

Family

ID=9972989

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1071762A Expired GB977913A (en) 1962-03-20 1962-03-20 Improvements in or relating to electrical apparatus and systems

Country Status (1)

Country Link
GB (1) GB977913A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527985A (en) * 1966-12-02 1970-09-08 Foxboro Co Electrical barrier device
US3955132A (en) * 1973-07-31 1976-05-04 Coal Industry (Patents) Limited Intrinsically safe power supply apparatus
US4053875A (en) * 1976-12-27 1977-10-11 Kupersmit Julius B Static charge detector having fail-safe voltage surge protection means
US4305283A (en) * 1979-08-29 1981-12-15 Whessoe Limited Position determining apparatus
GB2183943A (en) * 1985-11-28 1987-06-10 Danfoss As Protective circuit for the field coil of an electromagnetic flow meter
GB2215538A (en) * 1988-02-03 1989-09-20 British Telecomm Protector device
GB2232021A (en) * 1989-03-02 1990-11-28 Hemscheidt Maschf Hermann An intrinsically safe power supply
DE29822765U1 (en) * 1998-12-21 2000-01-27 Siemens AG, 80333 München Circuit arrangement for voltage rectification and limitation
WO2010001057A2 (en) * 2008-07-04 2010-01-07 Saint-Gobain Glass France Method for electrically securing an electrical power supply of an electrically controlled lighting system or system with variable optical properties and use of the electrically secured system

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527985A (en) * 1966-12-02 1970-09-08 Foxboro Co Electrical barrier device
US3955132A (en) * 1973-07-31 1976-05-04 Coal Industry (Patents) Limited Intrinsically safe power supply apparatus
US4053875A (en) * 1976-12-27 1977-10-11 Kupersmit Julius B Static charge detector having fail-safe voltage surge protection means
US4305283A (en) * 1979-08-29 1981-12-15 Whessoe Limited Position determining apparatus
GB2183943B (en) * 1985-11-28 1989-10-11 Danfoss As Protective circuit for the field coil of an electromagnetic flow meter
GB2183943A (en) * 1985-11-28 1987-06-10 Danfoss As Protective circuit for the field coil of an electromagnetic flow meter
GB2215538B (en) * 1988-02-03 1992-07-08 British Telecomm Protector device
GB2215538A (en) * 1988-02-03 1989-09-20 British Telecomm Protector device
GB2232021A (en) * 1989-03-02 1990-11-28 Hemscheidt Maschf Hermann An intrinsically safe power supply
GB2232021B (en) * 1989-03-02 1993-07-28 Hemscheidt Maschf Hermann An intrinsically safe power supply unit
DE29822765U1 (en) * 1998-12-21 2000-01-27 Siemens AG, 80333 München Circuit arrangement for voltage rectification and limitation
WO2010001057A2 (en) * 2008-07-04 2010-01-07 Saint-Gobain Glass France Method for electrically securing an electrical power supply of an electrically controlled lighting system or system with variable optical properties and use of the electrically secured system
FR2933504A1 (en) * 2008-07-04 2010-01-08 Saint Gobain METHOD FOR ELECTRICALLY SECURING AN ELECTRICAL POWER SUPPLY OF AN ELECTROCOMMANDABLE SYSTEM WITH VARIABLE OR LIGHTING OPTICAL PROPERTIES, USES OF THE ELECTRICALLY SECURED SYSTEM
WO2010001057A3 (en) * 2008-07-04 2010-04-22 Saint-Gobain Glass France Method for electrically securing an electrical power supply of an electrically controlled lighting system or system with variable optical properties and use of the electrically secured system
CN102144184A (en) * 2008-07-04 2011-08-03 法国圣-戈班玻璃公司 Method for electrically securing an electrical power supply of an electrically controlled lighting system or system with variable optical properties and use of the electrically secured system
US8336189B2 (en) 2008-07-04 2012-12-25 Saint-Gobain Glass France Method for electrically securing an electrical power supply of a system with variable optical properties

Similar Documents

Publication Publication Date Title
GB1381035A (en) Electrical system with current and voltage limiting-protective means
GB1089282A (en) Protection arrangement for telephone lines
GB953419A (en) Improvements in or relating to excess voltage safety devices
GB1133750A (en) Electrical barrier device
GB977913A (en) Improvements in or relating to electrical apparatus and systems
ES8204565A1 (en) Overcurrent protection circuit for power transistor
GB1121720A (en) Control and measuring system for high voltage electric power transmission systems
GB1256780A (en)
CA738566A (en) Electric surge generator
GB1066958A (en) Improvements in high voltage direct current power transmission systems
GB1314270A (en) Inductance coil devices
GB1363392A (en) Electrical barrier circuit
GB1254788A (en) Improvements in or relating to devices for indicating the condition of a switch
GB1292143A (en) Fault protection devices
ES353773A2 (en) Adjusting system for universal motors
GB1495456A (en) Low consumption electronic apparatus
GB1110447A (en) Circuit arrangement for limiting excessive voltages
GB1306330A (en)
GB1107827A (en) Arrangements for limiting excess currents in a.c. networks
JPS55154809A (en) Input protecting circuit of operational amplifier
JPS56100467A (en) Protecting device against electrostatic destruction
CA727759A (en) Direct current line fault protective system
FR2425150A1 (en) Protection circuit for high power transistor equipment - uses Zener diodes and resistors to limit current in each transistor independently
CA609965A (en) Diesel electric and other electrical power transmission systems
GB1151027A (en) Battery Charging Circuit.