GB808924A - Improvements in or relating to electrical time delay apparatus - Google Patents

Improvements in or relating to electrical time delay apparatus

Info

Publication number
GB808924A
GB808924A GB13825/56A GB1382556A GB808924A GB 808924 A GB808924 A GB 808924A GB 13825/56 A GB13825/56 A GB 13825/56A GB 1382556 A GB1382556 A GB 1382556A GB 808924 A GB808924 A GB 808924A
Authority
GB
United Kingdom
Prior art keywords
transductor
winding
control
relay
signal
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
GB13825/56A
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.)
Westinghouse Electric International Co
Original Assignee
Westinghouse Electric International Co
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 Westinghouse Electric International Co filed Critical Westinghouse Electric International Co
Publication of GB808924A publication Critical patent/GB808924A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/32—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/012—Automatic controllers electric details of the transmission means
    • G05B11/016—Automatic controllers electric details of the transmission means using inductance means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • H01H47/34—Energising current supplied by magnetic amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Control Of Electrical Variables (AREA)
  • Control Of Voltage And Current In General (AREA)

Abstract

808,924. Automatic voltage control systems. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. May 4, 1956 [May 10, 1955], No. 13825/56. Class 38 (4). [Also in Group XXXIX] In an automatic tap-changing system for regulating the voltage of an A.C. supply, in which response to transient fluctuations is eliminated by introducing a time delay, the delay is effected by an auto-self-excited bridge rectifying transductor with a long timeconstant circuit to energize a control winding. The transformer tap changer 2 is actuated by a reversible motor 47 controlled by relays 41, 43. Relay 41 is energized via a time delay transductor MA1 when a lower limit voltagesensing relay 9 drops out and connects a signal voltage of one polarity from rectifier 21 to the control windings of the transductor, and relay 43 is similarly energized via a time delay transductor MA2 from a signal voltage source 25 of opposite polarity by an upper limit relay 13. A no-volt relay 11 normally maintains contacts 19 closed. The transductor MA1 is biased by a winding BW1 to provide minimum output in the absence of a signal on at least two other control windings. The control signal voltage from 21 is applied directly to one control winding AC1 to prepare the transductor for conduction. The signal also charges a capacitor 91 through a resistor 33 until after the desired delay a neon tube 93 conducts and momentarily energizes a second control winding MC1. The combined effect of the two windings MC1, AC1 saturates the transductor which, due to selfsaturation and positive feed-back winding PF1 conducts heavily to energize the relay 41. The feed-back winding PF1 also serves to maintain conduction in the absence of a continuing signal in winding MC1. As the tap changer operates, a cam 61 opens contacts 55 to de-energize winding AC1 and so render the transductor again non-conducting, and closes contacts 57 to discharge capacitor 91. The motor then continues to run under undisclosed control to complete the tap change cycle and also reset contacts 55, 57 ready for the next cycle of operation. The operation of transductor MA2 is identical in respect of control signals of opposite polarity.
GB13825/56A 1955-05-10 1956-05-04 Improvements in or relating to electrical time delay apparatus Expired GB808924A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA585040T
US507214A US2752556A (en) 1955-05-10 1955-05-10 Electrical time delay apparatus

Publications (1)

Publication Number Publication Date
GB808924A true GB808924A (en) 1959-02-11

Family

ID=74174822

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13825/56A Expired GB808924A (en) 1955-05-10 1956-05-04 Improvements in or relating to electrical time delay apparatus

Country Status (6)

Country Link
US (1) US2752556A (en)
JP (1) JPS349231B1 (en)
CA (1) CA585040A (en)
DE (1) DE1136767B (en)
FR (1) FR1153474A (en)
GB (1) GB808924A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3026470A (en) * 1957-03-22 1962-03-20 Westinghouse Electric Corp Control apparatus
BE568557A (en) * 1957-06-14
US3086165A (en) * 1958-06-27 1963-04-16 Ite Circuit Breaker Ltd Shockless automatic to manual changeover system for regulators
US3054943A (en) * 1958-10-01 1962-09-18 Gen Electric Control system for voltage regulator
US3235788A (en) * 1962-09-17 1966-02-15 Mc Graw Edison Co Voltage magnitude control circuit
US3237091A (en) * 1962-09-17 1966-02-22 Mc Graw Edison Co Voltage magnitude control system
BE638754A (en) * 1962-10-18
US3252078A (en) * 1962-11-21 1966-05-17 Wagner Electric Corp Transformer tap-changing voltage regulating system
US3275928A (en) * 1963-06-04 1966-09-27 Gen Electric Voltage regulator with magnetic amplifier elements
US3395349A (en) * 1964-02-10 1968-07-30 American Gage & Mach Wide angle d'arsonval movement having core mounting means interfitted with the core ring

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547615A (en) * 1948-10-26 1951-04-03 Gen Electric Saturable core reactor

Also Published As

Publication number Publication date
CA585040A (en) 1959-10-13
DE1136767B (en) 1962-09-20
JPS349231B1 (en) 1959-10-15
US2752556A (en) 1956-06-26
FR1153474A (en) 1958-03-11

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