JPS56133665A - Temperature rise testing circuit of three-phase transformer - Google Patents

Temperature rise testing circuit of three-phase transformer

Info

Publication number
JPS56133665A
JPS56133665A JP3722280A JP3722280A JPS56133665A JP S56133665 A JPS56133665 A JP S56133665A JP 3722280 A JP3722280 A JP 3722280A JP 3722280 A JP3722280 A JP 3722280A JP S56133665 A JPS56133665 A JP S56133665A
Authority
JP
Japan
Prior art keywords
current
winding
terminals
terminal
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.)
Pending
Application number
JP3722280A
Other languages
Japanese (ja)
Inventor
Osamu Ikeda
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP3722280A priority Critical patent/JPS56133665A/en
Publication of JPS56133665A publication Critical patent/JPS56133665A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/62—Testing of transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

PURPOSE:To reduce a leakage magnetic flux by generating magnetic fluxes around the primary winding and secondary winding as positive-phase magnetic fluxes by supplying single-phase power from two terminals of a triangular winding, by short-circuiting two terminals of a star winding, and by short-circuiting the other one terminal and a neutral terminal. CONSTITUTION:As an exciting current is supplied to primary winding 2 from single-phase power source 4, the current of capacitor 6 for phase advance is superposed and supplied to primary cable 3a and current I1 flows through the coil between terminals V and W of primary winding 2 to flow current I2 through the coil extending terminals V, U and W in sequence. The current flowing through feeding cable 3b is measured by current transformer 5 and adjustments are so made that the sum of currents I1 and I2 will be equal to the rated current of winding 2. With regard to winding 3, I3 flows through the closed circuit of neutral point (o), and terminals (v) and (w), and short-circuit current I4 also flows through the closed circuit of neutral point (o), neutral terminal o-1 and terminal (u) as shown in the figure. Thus, the directions of currents flowing through respective windings are set in the direction where a positive-phase magnetic flux is generated, thereby reducing a leakage magnetic flux.
JP3722280A 1980-03-24 1980-03-24 Temperature rise testing circuit of three-phase transformer Pending JPS56133665A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3722280A JPS56133665A (en) 1980-03-24 1980-03-24 Temperature rise testing circuit of three-phase transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3722280A JPS56133665A (en) 1980-03-24 1980-03-24 Temperature rise testing circuit of three-phase transformer

Publications (1)

Publication Number Publication Date
JPS56133665A true JPS56133665A (en) 1981-10-19

Family

ID=12491558

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3722280A Pending JPS56133665A (en) 1980-03-24 1980-03-24 Temperature rise testing circuit of three-phase transformer

Country Status (1)

Country Link
JP (1) JPS56133665A (en)

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