GB371938A - Improvements in electric potential dividers - Google Patents

Improvements in electric potential dividers

Info

Publication number
GB371938A
GB371938A GB308631A GB308631A GB371938A GB 371938 A GB371938 A GB 371938A GB 308631 A GB308631 A GB 308631A GB 308631 A GB308631 A GB 308631A GB 371938 A GB371938 A GB 371938A
Authority
GB
United Kingdom
Prior art keywords
resistance
cable
voltage
condensers
delay
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
GB308631A
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB308631A priority Critical patent/GB371938A/en
Publication of GB371938A publication Critical patent/GB371938A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/04—Voltage dividers
    • G01R15/06—Voltage dividers having reactive components, e.g. capacitive transformer

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

371,938. Current and pressure meters. BURCH, F. P., Park House, Atkinson Road, Sale, Cheshire, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Crown House, Aldwych, London. Jan. 30, 1931, No. 3086. [Class 37.] A potential divider with a delay cable, particularly for oscillographic measurement of voltage, is formed wholly or in part by condensers, shunt impedances being arranged at both ends of the delay cable for the purpose of preventing reflection of voltage waves. The purpose of the delay cable is to permit initiation of the time-sweeping motion before the application of the voltage to be measured to a cathode ray oscillograph. The delay cable 5 has a central cone 6 and an outer sheath 7, the former being connected to the tapping point between the high and low voltage condensers 9, 10 of the potential divider through a resistance 11 and the latter being connected to the earthed end of the high voltage supply. The output ends of the delay cable are connected to low voltage terminals 3, 4 across which a resistance 13 and capacity 14 are connected in series. The values of the resistances 11, 13 are equal to the surge impedance of the cable 5 and equations for obtaining optimum values of the condensers 9, 10, 14 in relation to each other and the capacity of the cable 5 are given in the Specification. In a modification, Fig. 2, resistances 15, 16 are connected in series with the condensers 9, 10 respectively and the resistance 11 is omitted, its function being performed by the resistance 16, the value of which is calculated in accordance with the resistance 15 and the surge impedance of the delay cable. All resistances and capacities are proportioned to reduce distortion and to make the initial value of the output voltage at the terminals 3, 4 is equal to its final value. An equation for the resistance 16 in terms of the resistance 15 and the surge impedance of the cable 5 is given in the Specification. The Provisional Specification describes an arrangement equivalent to that shown in Fig. 1 for the measurement of variations in the field strength at the earth's surface due to weather phenomena.
GB308631A 1931-01-30 1931-01-30 Improvements in electric potential dividers Expired GB371938A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB308631A GB371938A (en) 1931-01-30 1931-01-30 Improvements in electric potential dividers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB308631A GB371938A (en) 1931-01-30 1931-01-30 Improvements in electric potential dividers

Publications (1)

Publication Number Publication Date
GB371938A true GB371938A (en) 1932-05-02

Family

ID=9751691

Family Applications (1)

Application Number Title Priority Date Filing Date
GB308631A Expired GB371938A (en) 1931-01-30 1931-01-30 Improvements in electric potential dividers

Country Status (1)

Country Link
GB (1) GB371938A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4241373A (en) * 1979-03-30 1980-12-23 Mcgraw-Edison Company Switchgear voltage sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4241373A (en) * 1979-03-30 1980-12-23 Mcgraw-Edison Company Switchgear voltage sensor

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