JPS6439223A - Excess current protecting power switch - Google Patents

Excess current protecting power switch

Info

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
Application number
JP62194996A
Other languages
Japanese (ja)
Inventor
Makoto Murase
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP62194996A priority Critical patent/JPS6439223A/en
Publication of JPS6439223A publication Critical patent/JPS6439223A/en
Pending legal-status Critical Current

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.
JP62194996A 1987-08-04 1987-08-04 Excess current protecting power switch Pending JPS6439223A (en)

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)

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