JPS56133666A - Testing method of dielectric strength - Google Patents

Testing method of dielectric strength

Info

Publication number
JPS56133666A
JPS56133666A JP3795480A JP3795480A JPS56133666A JP S56133666 A JPS56133666 A JP S56133666A JP 3795480 A JP3795480 A JP 3795480A JP 3795480 A JP3795480 A JP 3795480A JP S56133666 A JPS56133666 A JP S56133666A
Authority
JP
Japan
Prior art keywords
voltage
electrode
dividing
electrodes
potential
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
JP3795480A
Other languages
Japanese (ja)
Inventor
Isao Tani
Kiyoshi Otozaki
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP3795480A priority Critical patent/JPS56133666A/en
Publication of JPS56133666A publication Critical patent/JPS56133666A/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
    • G01R31/34—Testing dynamo-electric machines
    • G01R31/346—Testing of armature or field windings

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

PURPOSE:To take a test of dielectric strength to a DC voltage as to a stator coil, cable etc., in rated voltage, by providing voltage-dividing electrodes at the coil end part of an electric-field reduction layer and by applying the voltage obtained by dividing a voltage applied to a conductor. CONSTITUTION:At the outer circumference of main insulating layer 5 of the coil end side part of electric field reduction layer 7, voltage-dividing electrodes 9a and 9b are provided and the 20% and 60% voltage taps of power source 8 are connected respectively. As the voltage-dividing electrodes, electrodes wound with usual conductive metallic foil of about 10mm. in width may be used. Consequently, the potential distribution of voltage reducing layer 7 is shown by (b) and the potentials of the voltage- dividing electrodes are forcibly held at the same potentials with the tap voltages of the DC high-voltage source. As a result, gradients of rises in potential from one terminal of the electric-field reduction layer to electrode 9a, electrode 9a to electrode 9b, and electrode 9b to the 100% potential are more gentle than usual, and no creeping discharge occurs on the surface of main insulating layer 5.
JP3795480A 1980-03-24 1980-03-24 Testing method of dielectric strength Pending JPS56133666A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3795480A JPS56133666A (en) 1980-03-24 1980-03-24 Testing method of dielectric strength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3795480A JPS56133666A (en) 1980-03-24 1980-03-24 Testing method of dielectric strength

Publications (1)

Publication Number Publication Date
JPS56133666A true JPS56133666A (en) 1981-10-19

Family

ID=12511936

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3795480A Pending JPS56133666A (en) 1980-03-24 1980-03-24 Testing method of dielectric strength

Country Status (1)

Country Link
JP (1) JPS56133666A (en)

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