JPS5471355A - Eddy current relay - Google Patents
Eddy current relayInfo
- Publication number
- JPS5471355A JPS5471355A JP13793977A JP13793977A JPS5471355A JP S5471355 A JPS5471355 A JP S5471355A JP 13793977 A JP13793977 A JP 13793977A JP 13793977 A JP13793977 A JP 13793977A JP S5471355 A JPS5471355 A JP S5471355A
- Authority
- JP
- Japan
- Prior art keywords
- level
- multiplyer
- added
- output
- subtractor
- 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
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE: To obtain approximate over load protective characteristics of I2t in high accuracy, by introducing square I2 of effective value of input current, using an analogue multiplyer, and using level judgement in which setting interval is set by power number of 2 of a setting timer.
CONSTITUTION: Voltage which was made as a suitable level with an auxiliary transformer 21 is added to an analogue multiplyer 22, and square output wave shape information of input current i is obtained. A shifter 23 obtains only I2 component of direct current level which is necessary to judge over current from this instrument. Output of the multiplyer 22 and the shifter 23 is added to a subtractor 24, and output I2 of the subtractor 24 is added to a level judging instrument 25. A timer 26 makes I2 which is set for prevention of over load to be lower level than a specified level.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13793977A JPS5471355A (en) | 1977-11-18 | 1977-11-18 | Eddy current relay |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13793977A JPS5471355A (en) | 1977-11-18 | 1977-11-18 | Eddy current relay |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5471355A true JPS5471355A (en) | 1979-06-07 |
Family
ID=15210226
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13793977A Pending JPS5471355A (en) | 1977-11-18 | 1977-11-18 | Eddy current relay |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5471355A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05292656A (en) * | 1992-04-13 | 1993-11-05 | Mitsubishi Electric Corp | Overcurrent protective apparatus for power device |
-
1977
- 1977-11-18 JP JP13793977A patent/JPS5471355A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05292656A (en) * | 1992-04-13 | 1993-11-05 | Mitsubishi Electric Corp | Overcurrent protective apparatus for power device |
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