JPS57132071A - Insulation monitor device of ac rotary machine - Google Patents

Insulation monitor device of ac rotary machine

Info

Publication number
JPS57132071A
JPS57132071A JP1746781A JP1746781A JPS57132071A JP S57132071 A JPS57132071 A JP S57132071A JP 1746781 A JP1746781 A JP 1746781A JP 1746781 A JP1746781 A JP 1746781A JP S57132071 A JPS57132071 A JP S57132071A
Authority
JP
Japan
Prior art keywords
voltage
output
rotary machine
phase
component
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
JP1746781A
Other languages
Japanese (ja)
Inventor
Yoshiaki Ichikawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1746781A priority Critical patent/JPS57132071A/en
Publication of JPS57132071A publication Critical patent/JPS57132071A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)

Abstract

PURPOSE:To monitor the degree of deterioration of insulation, by measuring the component of the voltage which is proportional to the value of the leaked current of an AC rotary machine and accordingly obtaining the dielectric loss tangent of an insulator when the rotary machine is in operation working. CONSTITUTION:The both-end voltage E2 of a neutral earthing resistance 4 of a three-phase AC generator is shifted by 90 deg. by a phase shifter 7 and amplified at 8 up to -B-fold. The voltage added with the frequency voltage E1 obtained by applying 3-fold multiplication to the terminal voltage by an adder 9 is applied to a BPF10 to obtain a component E1A having the same phase as the voltage E2 in the voltage E1 to the output of the BPF10. At the same time, the output of the amplifier 8 is applied to a BPF11 to obtain a component E1B having a phase different from the voltage E2 by 90 deg. at the output of the BPF11. Then the voltages E2, E1A and E1B of the output of a signal detecting circuit 13 are applied to an arithmetic processing part 14 to calculate tandelta0.
JP1746781A 1981-02-10 1981-02-10 Insulation monitor device of ac rotary machine Pending JPS57132071A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1746781A JPS57132071A (en) 1981-02-10 1981-02-10 Insulation monitor device of ac rotary machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1746781A JPS57132071A (en) 1981-02-10 1981-02-10 Insulation monitor device of ac rotary machine

Publications (1)

Publication Number Publication Date
JPS57132071A true JPS57132071A (en) 1982-08-16

Family

ID=11944816

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1746781A Pending JPS57132071A (en) 1981-02-10 1981-02-10 Insulation monitor device of ac rotary machine

Country Status (1)

Country Link
JP (1) JPS57132071A (en)

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