GB884319A - Phase sequence segregating network for a three-phase electrical system - Google Patents

Phase sequence segregating network for a three-phase electrical system

Info

Publication number
GB884319A
GB884319A GB9603/60A GB960360A GB884319A GB 884319 A GB884319 A GB 884319A GB 9603/60 A GB9603/60 A GB 9603/60A GB 960360 A GB960360 A GB 960360A GB 884319 A GB884319 A GB 884319A
Authority
GB
United Kingdom
Prior art keywords
impedances
inductance
vector
network
phase
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
GB9603/60A
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
Allmanna Svenska Elektriska AB
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 ASEA AB, Allmanna Svenska Elektriska AB filed Critical ASEA AB
Publication of GB884319A publication Critical patent/GB884319A/en
Priority to MY6400134A priority Critical patent/MY6400134A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/18—Indicating phase sequence; Indicating synchronism

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

884,319. Protective arrangements. ALLMANNA SVENSKA ELEKTRISKA A.B. March 18, 1960 [March 19, 1959], No. 9603/60. Class 38 (5). A phase-sequence segregating network which is substantially independent of frequency variations, comprises a resistor 4, an inductance 3 and the series combination of an inductance 1 and a resistor 2, these impedances being so dimensioned and connected that when the protected system comprises only those phase sequence voltages for which the network is to be insensitive, the sum of the currents I 1 , I 2 , I 3 through the impedances is zero. Also in a vector representation of the currents through the impedances, the vector I 2 for the current through the inductance 3 is parallel to the tangent of the semicircle O constituting the locus with respect to frequency variations for the current I 1 through the inductance 1 and the resistor 2, at the point on the semicircle at which the end of the vector I 1 is situated at the nominal frequency, and the perpendicular distance from this point to the diameter of the semicircle is substantially equal to the length of the vector I 2 . In the arrangement of Fig. 1, the output from the network is obtained from the secondary winding 7 of a transformer having a primary winding in series with each of the three impedances. Figs. 4 and 5 (not shown) illustrate modified arrangements.
GB9603/60A 1959-03-19 1960-03-18 Phase sequence segregating network for a three-phase electrical system Expired GB884319A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
MY6400134A MY6400134A (en) 1960-03-18 1964-12-30 Improvements relating to filter cigarettes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE884319X 1959-03-19

Publications (1)

Publication Number Publication Date
GB884319A true GB884319A (en) 1961-12-13

Family

ID=20374490

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9603/60A Expired GB884319A (en) 1959-03-19 1960-03-18 Phase sequence segregating network for a three-phase electrical system

Country Status (1)

Country Link
GB (1) GB884319A (en)

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