GB1189650A - Adjustable Current Sensitive Relay. - Google Patents

Adjustable Current Sensitive Relay.

Info

Publication number
GB1189650A
GB1189650A GB29184/66A GB2918466A GB1189650A GB 1189650 A GB1189650 A GB 1189650A GB 29184/66 A GB29184/66 A GB 29184/66A GB 2918466 A GB2918466 A GB 2918466A GB 1189650 A GB1189650 A GB 1189650A
Authority
GB
United Kingdom
Prior art keywords
signal voltage
arrangement
trigger
relay
adjustable
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
GB29184/66A
Inventor
Aubrey Hudson White
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.)
James Archdale and Co Ltd
Original Assignee
James Archdale and Co 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 James Archdale and Co Ltd filed Critical James Archdale and Co Ltd
Priority to GB29184/66A priority Critical patent/GB1189650A/en
Publication of GB1189650A publication Critical patent/GB1189650A/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
    • H02H7/08—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 dynamo-electric motors
    • H02H7/085—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 dynamo-electric motors against excessive load

Landscapes

  • Relay Circuits (AREA)

Abstract

1,189,650. Protective systems. JAMES ARCHDALE & CO. Ltd. 6 June, 1967 [29 June, 1966], No. 29184/66. Heading H2K. An adjustable current sensitive relay arrangement for a D.C. machine comprises an adjustable resistor 1 for connection in series with the machine 2 to produce a D.C. signal voltage, a trigger circuit 7, 21 to an input terminal of which the D.C. signal voltage is applied, an adjustable biasing circuit 14 . . . 16 for applying to the input terminal a variable D.C. bias voltage in opposition to the D.C. signal voltage and an electromagnetic relay 27 operable by the trigger circuit. The arrangement is inoperative when the machine is being started, but is rendered operative when the contacts 13 of a timer T are opened. When the signal voltage overcomes the bias voltage, a transistor 7 conducts and provides a signal to operate a Schmitt trigger 21 with a slight delay imposed by capacitors 19, 22 and resistor 20. The output of the trigger 21 renders a transistor 30 conductive to energize the relay 27. The arrangement then functions in the manner described in Specification 1,186,371.
GB29184/66A 1966-06-29 1966-06-29 Adjustable Current Sensitive Relay. Expired GB1189650A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB29184/66A GB1189650A (en) 1966-06-29 1966-06-29 Adjustable Current Sensitive Relay.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29184/66A GB1189650A (en) 1966-06-29 1966-06-29 Adjustable Current Sensitive Relay.

Publications (1)

Publication Number Publication Date
GB1189650A true GB1189650A (en) 1970-04-29

Family

ID=10287495

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29184/66A Expired GB1189650A (en) 1966-06-29 1966-06-29 Adjustable Current Sensitive Relay.

Country Status (1)

Country Link
GB (1) GB1189650A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2185480A1 (en) * 1972-05-22 1974-01-04 Totsu Katsuyuki
GB2245114A (en) * 1990-05-31 1991-12-18 Toshiba Kk Overcurrent detector with biased sense resistor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2185480A1 (en) * 1972-05-22 1974-01-04 Totsu Katsuyuki
GB2245114A (en) * 1990-05-31 1991-12-18 Toshiba Kk Overcurrent detector with biased sense resistor
GB2245114B (en) * 1990-05-31 1994-11-23 Toshiba Kk Overcurrent detector

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Legal Events

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