JPS5712370A - Electric current discriminating device - Google Patents

Electric current discriminating device

Info

Publication number
JPS5712370A
JPS5712370A JP8763680A JP8763680A JPS5712370A JP S5712370 A JPS5712370 A JP S5712370A JP 8763680 A JP8763680 A JP 8763680A JP 8763680 A JP8763680 A JP 8763680A JP S5712370 A JPS5712370 A JP S5712370A
Authority
JP
Japan
Prior art keywords
current
voltage
magnitude
different
com4
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
JP8763680A
Other languages
Japanese (ja)
Inventor
Yoshinori Suzuki
Seiichi Uyama
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP8763680A priority Critical patent/JPS5712370A/en
Publication of JPS5712370A publication Critical patent/JPS5712370A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/1659—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 to indicate that the value is within or outside a predetermined range of values (window)
    • G01R19/16595—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 to indicate that the value is within or outside a predetermined range of values (window) with multi level indication

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE:To discriminate the magnitude of a current in different display mode easily and securely, by rectifying an AC current detected by a magnetically coupling detection coil and by making a stepwise display according to comparisons with different discrimination levels. CONSTITUTION:An AC voltage from a conductor 3 connected to an AC power source at one terminal and to a load 5, etc., at the other is rectified through diodes 7 and 8, a capacitor 9, a Zener diode 10, etc. This DC voltage is divided via series voltage-dividing resistances R1-R5 into different-level reference voltages, which are applied to comparing circuits COM1-COM4. Those circuits COM1-COM4, on the other hand, are applied with a DC voltage which corresponds to an AC current detected by a magnetically coupling detector 11, rectifies by a rectifying circit 14, and flowing through the other conductor 4. Then, corresponding LEDs L1-L5 turn on sequentially and successively corresponding to the magnitude of the AC current in the order of the LEDL1, LEDs L1 and L2-, thereby displaying the magnitude of the AC current stepwise in different display mode. Therefore, the agnitude of the current is discriminated easily and securely to prevent an overcurrent from flowing.
JP8763680A 1980-06-26 1980-06-26 Electric current discriminating device Pending JPS5712370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8763680A JPS5712370A (en) 1980-06-26 1980-06-26 Electric current discriminating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8763680A JPS5712370A (en) 1980-06-26 1980-06-26 Electric current discriminating device

Publications (1)

Publication Number Publication Date
JPS5712370A true JPS5712370A (en) 1982-01-22

Family

ID=13920457

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8763680A Pending JPS5712370A (en) 1980-06-26 1980-06-26 Electric current discriminating device

Country Status (1)

Country Link
JP (1) JPS5712370A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185270U (en) * 1984-05-21 1985-12-09 有限会社　アスペン voltage display device
JPH03121282U (en) * 1990-03-27 1991-12-12
EP0636893A2 (en) * 1993-07-30 1995-02-01 Cesare Gallone Circuit device for visually signalling leakage currents from an electric system to earth
KR100714277B1 (en) 2006-07-12 2007-05-11 주식회사 인스모바일 A serial connection-typed led module for level meter and level meter thereby

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54111868A (en) * 1978-02-16 1979-09-01 Robson William F Electrostatic field indicator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54111868A (en) * 1978-02-16 1979-09-01 Robson William F Electrostatic field indicator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185270U (en) * 1984-05-21 1985-12-09 有限会社　アスペン voltage display device
JPH03121282U (en) * 1990-03-27 1991-12-12
EP0636893A2 (en) * 1993-07-30 1995-02-01 Cesare Gallone Circuit device for visually signalling leakage currents from an electric system to earth
EP0636893A3 (en) * 1993-07-30 1995-03-29 Cesare Gallone Circuit device for visually signalling leakage currents from an electric system to earth.
KR100714277B1 (en) 2006-07-12 2007-05-11 주식회사 인스모바일 A serial connection-typed led module for level meter and level meter thereby

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