JPS54136639A - Transformer protective relay - Google Patents
Transformer protective relayInfo
- Publication number
- JPS54136639A JPS54136639A JP4448078A JP4448078A JPS54136639A JP S54136639 A JPS54136639 A JP S54136639A JP 4448078 A JP4448078 A JP 4448078A JP 4448078 A JP4448078 A JP 4448078A JP S54136639 A JPS54136639 A JP S54136639A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- output
- inhibit
- rush
- circuit
- 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 suppress an output of the ratio differential element from each phase, by processing an output of in-rush waveform decision inhibit element to be made under "OR" condition through all phase components in the multiphase system.
CONSTITUTION: Paying attention to the fact that, the in-rush current, when applied an input voltage to the transformer of AC multiphase, comprise a second higher harmonic component, in at least one phase of the phases, exceeding a level of 15% of the fundamental wave component, an output 11ac, 11bc, 11cc of the in-rush waveform dicision inhibit element 11a, 11b, 11c, provided in each phase, after being combined by an OR circuit 14, is fed as a suppressing input to an inhibit circuit 13a, 13b, 13c, provided in each phase, and the generation of a trip command signal is prevented.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4448078A JPS54136639A (en) | 1978-04-14 | 1978-04-14 | Transformer protective relay |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4448078A JPS54136639A (en) | 1978-04-14 | 1978-04-14 | Transformer protective relay |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54136639A true JPS54136639A (en) | 1979-10-23 |
Family
ID=12692691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4448078A Pending JPS54136639A (en) | 1978-04-14 | 1978-04-14 | Transformer protective relay |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54136639A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0417515A (en) * | 1990-05-09 | 1992-01-22 | Mitsubishi Electric Corp | Protective relay unit for transformer |
-
1978
- 1978-04-14 JP JP4448078A patent/JPS54136639A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0417515A (en) * | 1990-05-09 | 1992-01-22 | Mitsubishi Electric Corp | Protective relay unit for transformer |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS54136639A (en) | Transformer protective relay | |
KR950001815A (en) | Reverse Phase Overcurrent Relay | |
JPS54113044A (en) | Ground faulted phase detecting relay | |
JPS51133747A (en) | Transformer protection relay system of digital type | |
JPS54111647A (en) | Protective relay apparatus for transformer | |
JPS52131139A (en) | Three phase ac voltage control circuit | |
JPS5679223A (en) | Detecting system for instantaneous torque of ac motor | |
JPS54140111A (en) | Control device of electric generator | |
JPS5534835A (en) | Control method of inverter | |
JPS54142542A (en) | Phase relay | |
JPS54132749A (en) | Protective relaying equipment | |
JPS5317948A (en) | Protective circuit for overcurrent | |
JPS54106816A (en) | Control system for ac motor | |
JPS5676056A (en) | Output circuit of current transformer | |
JPS5480540A (en) | Power source device | |
JPS5571176A (en) | Protective system of direct current power source system | |
JPS54162149A (en) | Neutral grounding monitor of generator | |
JPS5288753A (en) | Static type voltage regulating system | |
JPS54101132A (en) | Inverter protecting device | |
JPS54157245A (en) | Bus bar selecting relay device | |
JPS52120353A (en) | Protective device for dc power transmission system | |
JPS5355758A (en) | Overcurrent relay | |
JPS552963A (en) | Phase rotation detecting circuit for three-phase power supply | |
JPS52145728A (en) | Protection method of parallel inverter | |
JPS54115281A (en) | Phase detector |