GB971286A - Improvements in or relating to operation and fault indication for unidirectional conducting devices - Google Patents

Improvements in or relating to operation and fault indication for unidirectional conducting devices

Info

Publication number
GB971286A
GB971286A GB268763A GB268763A GB971286A GB 971286 A GB971286 A GB 971286A GB 268763 A GB268763 A GB 268763A GB 268763 A GB268763 A GB 268763A GB 971286 A GB971286 A GB 971286A
Authority
GB
United Kingdom
Prior art keywords
illuminated
rectifier
lamp
diode
resistor
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
GB268763A
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.)
Cutler Hammer Europe Ltd
Original Assignee
Brockhurst Igranic Ltd
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 Brockhurst Igranic Ltd filed Critical Brockhurst Igranic Ltd
Publication of GB971286A publication Critical patent/GB971286A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
    • H02H7/127—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers having auxiliary control electrode to which blocking control voltages or currents are applied in case of emergency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

971,286. Protective arrangements. BROOKHIRST IGRANIC Ltd. Jan. 22, 1963 [April 20, 1962], No. 2687/63. Heading H2K. Unidirectional conducting devices are provided with means indicating whether they are operating normally, are short circuited or are open circuit. As applied to a rectifying arrangement employing silicon controlled rectifiers SCR1, SCR2, a resistor R1 is connected in series with each rectifier SCR1 and the load 5, the potential across each resistor being applied to two indicators comprising a forwardly connected diode 6 and green lamp GL1 and a reversed diode 7 and red lamp RL1 respectively. During normal operation the potential across R1 is unidirectional, diode 6 conducts, diode 7 does not and only the green lamp is illuminated. If the rectifier is short circuited an alternating potential appears across the resistor R1, both diodes conduct and both lamps are illuminated. If the rectifier is open circuit neither lamp is illuminated. In a simple embodiment (Fig. 2, not shown), a neon lamp is connected across the rectifier. On normal operation one electrode only of the neon is illuminated. Upon short circuit the neon is not illuminated but if the rectifier becomes open circuit both electrodes are illuminated.
GB268763A 1962-04-20 1963-01-22 Improvements in or relating to operation and fault indication for unidirectional conducting devices Expired GB971286A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18905562A 1962-04-20 1962-04-20

Publications (1)

Publication Number Publication Date
GB971286A true GB971286A (en) 1964-09-30

Family

ID=22695722

Family Applications (1)

Application Number Title Priority Date Filing Date
GB268763A Expired GB971286A (en) 1962-04-20 1963-01-22 Improvements in or relating to operation and fault indication for unidirectional conducting devices

Country Status (1)

Country Link
GB (1) GB971286A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139437A (en) * 1983-04-18 1984-11-07 United Technologies Corp Resistive circuit detector
US5305338A (en) * 1990-09-25 1994-04-19 Mitsubishi Denki Kabushiki Kaisha Switch device for laser
GB2290427A (en) * 1994-06-14 1995-12-20 Coeval Products Ltd Fault detecting circuit for vehicle warning system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139437A (en) * 1983-04-18 1984-11-07 United Technologies Corp Resistive circuit detector
AU571210B2 (en) * 1983-04-18 1988-04-14 United Technologies Corporation Resistive circuit detector
US5305338A (en) * 1990-09-25 1994-04-19 Mitsubishi Denki Kabushiki Kaisha Switch device for laser
GB2250131B (en) * 1990-09-25 1995-01-25 Mitsubishi Electric Corp Switch device for laser
GB2290427A (en) * 1994-06-14 1995-12-20 Coeval Products Ltd Fault detecting circuit for vehicle warning system

Similar Documents

Publication Publication Date Title
US5338991A (en) High power solid state relay with input presence and polarity indication
GB1381035A (en) Electrical system with current and voltage limiting-protective means
GB1135785A (en) Circuit arrangement for the loop supervision and for discerning loop resistances
GB971286A (en) Improvements in or relating to operation and fault indication for unidirectional conducting devices
GB977913A (en) Improvements in or relating to electrical apparatus and systems
GB1524540A (en) Indicator lamp circuit having feedback protection
GB1069513A (en) Improvements in apparatus for electrically identifying one of a number of stations
GB1123799A (en) Overvoltage protection devices
GB1015691A (en) A circuit for monitoring the voltage of a d.c. source
GB1204651A (en) Electrical current flow indicating system
GB1254788A (en) Improvements in or relating to devices for indicating the condition of a switch
GB905188A (en) Mains-fed circuit arrangement including a half-wave semi-conductor rectifier device
GB1255864A (en) Monitoring series-connected switch devices
GB1296230A (en)
SU847428A1 (en) Device for current protection of load
GB1056625A (en) Improvements relating to a.c.-operated flame controls
GB1495456A (en) Low consumption electronic apparatus
ES338060A1 (en) Device warning and protecting against overvoltages especially for electrical shavers operating under two voltages
GB1310102A (en) Spark ignition apparatus
SU694650A1 (en) Power supply source having an overload protection
SU391687A1 (en) FRONT SAFE POWER SUPPLY
GB1110447A (en) Circuit arrangement for limiting excessive voltages
SU363153A1 (en) DEVICE FOR DIFFERENTIAL BLOCKING
GB886008A (en) Electro-magnetic relay circuits
GB1236568A (en) Intrinsically safe electrical power supply for use in inflammable atmospheres