GB357347A - Improvements relating to electrical measuring instruments - Google Patents

Improvements relating to electrical measuring instruments

Info

Publication number
GB357347A
GB357347A GB2492430A GB2492430A GB357347A GB 357347 A GB357347 A GB 357347A GB 2492430 A GB2492430 A GB 2492430A GB 2492430 A GB2492430 A GB 2492430A GB 357347 A GB357347 A GB 357347A
Authority
GB
United Kingdom
Prior art keywords
phase
voltage
measuring instruments
improvements relating
electrical measuring
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
GB2492430A
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.)
SIDNEY FREDERICK WILMOT FINNIS
Evershed and Vignoles Ltd
Original Assignee
SIDNEY FREDERICK WILMOT FINNIS
Evershed and Vignoles 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 SIDNEY FREDERICK WILMOT FINNIS, Evershed and Vignoles Ltd filed Critical SIDNEY FREDERICK WILMOT FINNIS
Priority to GB2492430A priority Critical patent/GB357347A/en
Publication of GB357347A publication Critical patent/GB357347A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/08—Measuring resistance by measuring both voltage and current
    • G01R27/10—Measuring resistance by measuring both voltage and current using two-coil or crossed-coil instruments forming quotient
    • G01R27/12—Measuring resistance by measuring both voltage and current using two-coil or crossed-coil instruments forming quotient using hand generators, e.g. meggers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Elimination Of Static Electricity (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

357,347. Supply meters. EVERSHED & VIGNOLES, Ltd., BAKER, C. F., and FINNIS, S. F. W., Acton Lane Works, Chiswick, London. Aug. 20, 1930, No. 24924. [Class 37.] Voltamperes on an unbalanced polyphase system are indicated, recorded or integrated by employing a current rectifier in each phase a, b, c, the voltage element of the instrument being the moving part and including two or more coils which carry currents out of phase with each other and are energised through full-wave rectifiers r, s, t. In a modification, two voltage rectifiers may be employed, one being connected with the neutral point which may be artificially made. The invention is adaptable for use on single-phase systems by inserting phaseshifting devices in the voltage coil leads.
GB2492430A 1930-08-20 1930-08-20 Improvements relating to electrical measuring instruments Expired GB357347A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2492430A GB357347A (en) 1930-08-20 1930-08-20 Improvements relating to electrical measuring instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2492430A GB357347A (en) 1930-08-20 1930-08-20 Improvements relating to electrical measuring instruments

Publications (1)

Publication Number Publication Date
GB357347A true GB357347A (en) 1931-09-24

Family

ID=10219410

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2492430A Expired GB357347A (en) 1930-08-20 1930-08-20 Improvements relating to electrical measuring instruments

Country Status (1)

Country Link
GB (1) GB357347A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281642A (en) * 1962-02-20 1966-10-25 Ite Circuit Breaker Ltd A.-c. measurement of d.-c. output of rectifiers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281642A (en) * 1962-02-20 1966-10-25 Ite Circuit Breaker Ltd A.-c. measurement of d.-c. output of rectifiers

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