JPS57132071A - Insulation monitor device of ac rotary machine - Google Patents
Insulation monitor device of ac rotary machineInfo
- 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
Links
- 238000009413 insulation Methods 0.000 title abstract 2
- 230000006866 deterioration Effects 0.000 abstract 1
- 239000012212 insulator Substances 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
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.
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) |
-
1981
- 1981-02-10 JP JP1746781A patent/JPS57132071A/en active Pending
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