GB951126A - Improvements in warning devices for use with three-phase electrical systems - Google Patents

Improvements in warning devices for use with three-phase electrical systems

Info

Publication number
GB951126A
GB951126A GB2349661A GB2349661A GB951126A GB 951126 A GB951126 A GB 951126A GB 2349661 A GB2349661 A GB 2349661A GB 2349661 A GB2349661 A GB 2349661A GB 951126 A GB951126 A GB 951126A
Authority
GB
United Kingdom
Prior art keywords
lamp
thermometer
electrical systems
phase electrical
warning devices
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
GB2349661A
Inventor
Frederick Edward Wil Schneider
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.)
Engel & Gibbs Ltd
Original Assignee
Engel & Gibbs 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 Engel & Gibbs Ltd filed Critical Engel & Gibbs Ltd
Priority to GB2349661A priority Critical patent/GB951126A/en
Publication of GB951126A publication Critical patent/GB951126A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
    • H02H3/253—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage for multiphase applications, e.g. phase interruption

Landscapes

  • Protection Of Transformers (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

951,126. Protective systems; rectifying. ENGEL & GIBBS Ltd. Oct. 2, 1962 [July 3, 1961], No. 23946/61. Headings H2F and H2K. Failure of any phase of a threephase supply system 10-12 reduces the sum of the rectified outputs of the three secondary windings 17-19 of a transformer 13, thus reducing the temperature of a contact thermometer 40 to open its contacts 41, 42 and break the circuit of a relay 43, thus to energize a warning device 49. In a modification, the thermometer contacts are alternatively connected across a lamp which is in series with a supply and a resistor. The thermometer normally shunts the lamp but on phase failure the lamp is illuminated.
GB2349661A 1961-07-03 1961-07-03 Improvements in warning devices for use with three-phase electrical systems Expired GB951126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2349661A GB951126A (en) 1961-07-03 1961-07-03 Improvements in warning devices for use with three-phase electrical systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2349661A GB951126A (en) 1961-07-03 1961-07-03 Improvements in warning devices for use with three-phase electrical systems

Publications (1)

Publication Number Publication Date
GB951126A true GB951126A (en) 1964-03-04

Family

ID=10196563

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2349661A Expired GB951126A (en) 1961-07-03 1961-07-03 Improvements in warning devices for use with three-phase electrical systems

Country Status (1)

Country Link
GB (1) GB951126A (en)

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