JPS5614319A - Nonelectric arc tap switching control unit - Google Patents
Nonelectric arc tap switching control unitInfo
- Publication number
- JPS5614319A JPS5614319A JP8875579A JP8875579A JPS5614319A JP S5614319 A JPS5614319 A JP S5614319A JP 8875579 A JP8875579 A JP 8875579A JP 8875579 A JP8875579 A JP 8875579A JP S5614319 A JPS5614319 A JP S5614319A
- Authority
- JP
- Japan
- Prior art keywords
- current
- detected
- circuit
- thyristors
- switching control
- 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
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 abstract 1
- 238000010891 electric arc Methods 0.000 abstract 1
Landscapes
- Control Of Electrical Variables (AREA)
Abstract
PURPOSE: To detect previously that resistors are overheated and burnt to generate the unoperatable state, the vehicle fire, and so on and prevent them safely, by performing tap switching control without electric arc.
CONSTITUTION: The main circuit current dependent upon the operation of the tap switch is detected by current detector 26 and is subjected to level conversion in 120, and presence or absence of the current is detected by no-current detector 121. In case that no-current is detected by 26 though this main circuit is operated and the tap switch is stopped in a prescribed position, control circuit 101 is faulty and a current is not given to thyristors 16 and 17. When the gate signal is given to thyristors 18W21, the main circuit current is flowed through thyristors 18 and 19 or 20 and 21. When this state continues for a set time by delay circuit 122 or more, operation stopping circuit 125 operates to stop circuit 101 forcedly. As a result, it is detected previously that resistors are overheated and burnt to generate the unoperatable state, the vehicle fire, and so on, so that they can be prevented safely.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8875579A JPS5614319A (en) | 1979-07-13 | 1979-07-13 | Nonelectric arc tap switching control unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8875579A JPS5614319A (en) | 1979-07-13 | 1979-07-13 | Nonelectric arc tap switching control unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5614319A true JPS5614319A (en) | 1981-02-12 |
Family
ID=13951702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8875579A Pending JPS5614319A (en) | 1979-07-13 | 1979-07-13 | Nonelectric arc tap switching control unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5614319A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59125386U (en) * | 1983-02-14 | 1984-08-23 | ジャガー株式会社 | sewing machine thread cutting tool |
| JPS62178975U (en) * | 1986-05-07 | 1987-11-13 | ||
| JPH0295396A (en) * | 1988-09-30 | 1990-04-06 | Hamusu Kk | Deflection correcting device for cloth end in sewing machine |
-
1979
- 1979-07-13 JP JP8875579A patent/JPS5614319A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59125386U (en) * | 1983-02-14 | 1984-08-23 | ジャガー株式会社 | sewing machine thread cutting tool |
| JPS62178975U (en) * | 1986-05-07 | 1987-11-13 | ||
| JPH0295396A (en) * | 1988-09-30 | 1990-04-06 | Hamusu Kk | Deflection correcting device for cloth end in sewing machine |
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