JPS54113046A - Transformer protective relay - Google Patents
Transformer protective relayInfo
- Publication number
- JPS54113046A JPS54113046A JP1968878A JP1968878A JPS54113046A JP S54113046 A JPS54113046 A JP S54113046A JP 1968878 A JP1968878 A JP 1968878A JP 1968878 A JP1968878 A JP 1968878A JP S54113046 A JPS54113046 A JP S54113046A
- Authority
- JP
- Japan
- Prior art keywords
- current
- relay
- higher harmonic
- output
- detecting
- 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
Landscapes
- Protection Of Transformers (AREA)
Abstract
PURPOSE: To prevent the mal-operation of current differential relay the input of which is the primary side inout current waveform and the secondary side output current waveform of transformer by providing a basic wave component notch circuit by which to remove basic wave component at the secondary higher harmonic component content detecting circuit.
CONSTITUTION: The differential relay 4, input of which is the output of the current transformers 2P and 2S, detects the difference between the outputs of 2P and 2S which is, if any, more than a predetermined value and then put into operation. The higher harmonic detecting relay 5, which has so far been known as a means of detecting the exciting rush current of the high tension machine 1, locks the output of the differential relay 4 at the coincidence gate 6 in case where the secondary higher harmonic component of current differential output drawn out of current transformers 2P and 2S exceeds a predetermined value. The coincidence gate 6 sends out a breaking allowable signal for the breakers 3P and 3S only by working signal for both differential relay 4 and the higher harmonic detecting relay 5.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1968878A JPS54113046A (en) | 1978-02-24 | 1978-02-24 | Transformer protective relay |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1968878A JPS54113046A (en) | 1978-02-24 | 1978-02-24 | Transformer protective relay |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54113046A true JPS54113046A (en) | 1979-09-04 |
Family
ID=12006172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1968878A Pending JPS54113046A (en) | 1978-02-24 | 1978-02-24 | Transformer protective relay |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54113046A (en) |
-
1978
- 1978-02-24 JP JP1968878A patent/JPS54113046A/en active Pending
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