JPS6439223A - Excess current protecting power switch - Google Patents
Excess current protecting power switchInfo
- Publication number
- JPS6439223A JPS6439223A JP62194996A JP19499687A JPS6439223A JP S6439223 A JPS6439223 A JP S6439223A JP 62194996 A JP62194996 A JP 62194996A JP 19499687 A JP19499687 A JP 19499687A JP S6439223 A JPS6439223 A JP S6439223A
- Authority
- JP
- Japan
- Prior art keywords
- turned
- excess current
- power switch
- transistor
- current protecting
- 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
- Electronic Switches (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE:To form a simple circuit at a low cost, by using a photo-coupler for an excess current detecting element, and a thyristor for a breaking element. CONSTITUTION:When a line voltage is turned into voltage determined by a Zener diode ZD1 and a transistor Tr 1, or more voltage, then the transistor Tr 1 and a thyristor SCR 1 are turned ON, and a transistor Tr 2 is turned ON, and the Tr 1 is turned OFF. In this state, current is fed to a load. When constant or more current flows to the load, then a photo-coupler 14 is turned ON, and a thyristor SCR 2 is triggered. Then, the thyristor SCR 1 is turned OFF, and feed is interrupted.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62194996A JPS6439223A (en) | 1987-08-04 | 1987-08-04 | Excess current protecting power switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62194996A JPS6439223A (en) | 1987-08-04 | 1987-08-04 | Excess current protecting power switch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6439223A true JPS6439223A (en) | 1989-02-09 |
Family
ID=16333799
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62194996A Pending JPS6439223A (en) | 1987-08-04 | 1987-08-04 | Excess current protecting power switch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6439223A (en) |
-
1987
- 1987-08-04 JP JP62194996A patent/JPS6439223A/en active Pending
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