JPS5478447A - Power switch-on circuit - Google Patents

Power switch-on circuit

Info

Publication number
JPS5478447A
JPS5478447A JP14497577A JP14497577A JPS5478447A JP S5478447 A JPS5478447 A JP S5478447A JP 14497577 A JP14497577 A JP 14497577A JP 14497577 A JP14497577 A JP 14497577A JP S5478447 A JPS5478447 A JP S5478447A
Authority
JP
Japan
Prior art keywords
circuit
power switch
power transformer
reliability
safety
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
JP14497577A
Other languages
Japanese (ja)
Inventor
Kenichi Iizuka
Katsuhiko Yabe
Yasunori Tominaga
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14497577A priority Critical patent/JPS5478447A/en
Publication of JPS5478447A publication Critical patent/JPS5478447A/en
Pending legal-status Critical Current

Links

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  • Direct Current Feeding And Distribution (AREA)

Abstract

PURPOSE: To supply no power to a power transformer except during the use of an apparatus and heighten the safety and reliability, by connecting a switch in series to the primary side of the power transformer.
CONSTITUTION: When the apparatus is not used, the switdh 15 and a non-locked switch 14 are open. Thus, the power transformer is not energized and no voltage is applied to a control circuit 10. Thereby, the reliability and safety of the control circuit are heightened.
COPYRIGHT: (C)1979,JPO&Japio
JP14497577A 1977-12-05 1977-12-05 Power switch-on circuit Pending JPS5478447A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14497577A JPS5478447A (en) 1977-12-05 1977-12-05 Power switch-on circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14497577A JPS5478447A (en) 1977-12-05 1977-12-05 Power switch-on circuit

Publications (1)

Publication Number Publication Date
JPS5478447A true JPS5478447A (en) 1979-06-22

Family

ID=15374545

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14497577A Pending JPS5478447A (en) 1977-12-05 1977-12-05 Power switch-on circuit

Country Status (1)

Country Link
JP (1) JPS5478447A (en)

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