JPS5762629A - Detecting device for fault of thyristor circuit - Google Patents

Detecting device for fault of thyristor circuit

Info

Publication number
JPS5762629A
JPS5762629A JP13746280A JP13746280A JPS5762629A JP S5762629 A JPS5762629 A JP S5762629A JP 13746280 A JP13746280 A JP 13746280A JP 13746280 A JP13746280 A JP 13746280A JP S5762629 A JPS5762629 A JP S5762629A
Authority
JP
Japan
Prior art keywords
load
thyristor
power
input
output
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
JP13746280A
Other languages
Japanese (ja)
Inventor
Shinichi Iwamoto
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
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP13746280A priority Critical patent/JPS5762629A/en
Publication of JPS5762629A publication Critical patent/JPS5762629A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/18—Modifications for indicating state of switch

Landscapes

  • Power Conversion In General (AREA)
  • Thyristor Switches And Gates (AREA)

Abstract

PURPOSE:To detect disconnection of a wiring to a load, by using a signal synchronized with an AC power source and a signal synchronized with the voltage between both terminals of a thyristor, in the device which detects the fault of a circuit which uses the thyristor to control AC power. CONSTITUTION:Power is supplied from an AC power source 1 to a load 3 by turning on a thyristor 2. A signal synchronized with the AC power source is detected by photocouplers 15-1 and 15-2 and is inputted to one input of an EX.OR 19, and power supply to the load 3 is detected by a photocoupler 6, and the detection output is inputted to the other input of the EX.OR 19. The output of the EX.OR 19 is inputted to one input of an EX.OR 9, and an H or L signal is given to the other input in accordance with turning-on or off of the thyristor 2. The output of the EX.OR 9 is L when the thyristor is turned on and power is supplied to the load, but the output of the EX.OR 9 is H when the wiring to the load 3 is disconnected and the load becomes open, thus detecting disconnection surely.
JP13746280A 1980-10-01 1980-10-01 Detecting device for fault of thyristor circuit Pending JPS5762629A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13746280A JPS5762629A (en) 1980-10-01 1980-10-01 Detecting device for fault of thyristor circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13746280A JPS5762629A (en) 1980-10-01 1980-10-01 Detecting device for fault of thyristor circuit

Publications (1)

Publication Number Publication Date
JPS5762629A true JPS5762629A (en) 1982-04-15

Family

ID=15199164

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13746280A Pending JPS5762629A (en) 1980-10-01 1980-10-01 Detecting device for fault of thyristor circuit

Country Status (1)

Country Link
JP (1) JPS5762629A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0220326A1 (en) * 1985-04-26 1987-05-06 Fanuc Ltd. Input state detection circuit
JP2010122082A (en) * 2008-11-20 2010-06-03 Omron Corp Fault detection circuit and electric power regulator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0220326A1 (en) * 1985-04-26 1987-05-06 Fanuc Ltd. Input state detection circuit
JP2010122082A (en) * 2008-11-20 2010-06-03 Omron Corp Fault detection circuit and electric power regulator

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