JPS5772077A - Device for judging opening and closing of contact point - Google Patents

Device for judging opening and closing of contact point

Info

Publication number
JPS5772077A
JPS5772077A JP55148691A JP14869180A JPS5772077A JP S5772077 A JPS5772077 A JP S5772077A JP 55148691 A JP55148691 A JP 55148691A JP 14869180 A JP14869180 A JP 14869180A JP S5772077 A JPS5772077 A JP S5772077A
Authority
JP
Japan
Prior art keywords
contact point
closing
circuit
whose
opening
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
JP55148691A
Other languages
Japanese (ja)
Inventor
Minoru Kita
Seikichi Nagai
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP55148691A priority Critical patent/JPS5772077A/en
Publication of JPS5772077A publication Critical patent/JPS5772077A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/167—Circuits for remote indication

Landscapes

  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

PURPOSE:To make it possible to judge opening and closing of a specified contact point even through plurality of contact points are connected in parallel, by connecting a reactor to a contact point, whose opening and closing are to be judged, in series in a DC electric circuit and the like, and connecting a measuring device which supplies a measuring current across the terminals to which said contact point is connectd when it is closed. CONSTITUTION:The output 2, whose openings and closing are to be identified, is connected to the reactor 5, whose DC resistance is approximately zero and reactance XOMEGA, in series. A parallel circuit is formed by connecting a connecting circuit 6 to a series circuit of said reactor 5 and said contact point 2 in parallel. Said parallel circuit is connected to a DC power source 1 through a contact point 7 and a load 3. The measuring device 8 is constituted by a series circuit of an AC power source 801 whose voltage crest value is ep, a rectifier 802, and a resistor 803. The measuring device 8 is connected across the terminals 201 and 202 to which the contact point 2 is connected. The opening and closing of the contact point 2 are judged by the magnitude of the voltage drop V across the resistor 803.
JP55148691A 1980-10-22 1980-10-22 Device for judging opening and closing of contact point Pending JPS5772077A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55148691A JPS5772077A (en) 1980-10-22 1980-10-22 Device for judging opening and closing of contact point

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55148691A JPS5772077A (en) 1980-10-22 1980-10-22 Device for judging opening and closing of contact point

Publications (1)

Publication Number Publication Date
JPS5772077A true JPS5772077A (en) 1982-05-06

Family

ID=15458436

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55148691A Pending JPS5772077A (en) 1980-10-22 1980-10-22 Device for judging opening and closing of contact point

Country Status (1)

Country Link
JP (1) JPS5772077A (en)

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