JPS57106923A - Automatic detecting method for earth line noise - Google Patents

Automatic detecting method for earth line noise

Info

Publication number
JPS57106923A
JPS57106923A JP55183479A JP18347980A JPS57106923A JP S57106923 A JPS57106923 A JP S57106923A JP 55183479 A JP55183479 A JP 55183479A JP 18347980 A JP18347980 A JP 18347980A JP S57106923 A JPS57106923 A JP S57106923A
Authority
JP
Japan
Prior art keywords
detector
earth line
output signal
input terminal
line noise
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
JP55183479A
Other languages
Japanese (ja)
Inventor
Fumio Suzuki
Kikuo Kasai
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55183479A priority Critical patent/JPS57106923A/en
Publication of JPS57106923A publication Critical patent/JPS57106923A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/14—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to occurrence of voltage on parts normally at earth potential
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
    • H02H1/0015—Using arc detectors

Landscapes

  • Power Sources (AREA)

Abstract

PURPOSE:To examine an intermittent fault due to a defective earth line easily and rapidly, by logging an earth line noise successively. CONSTITUTION:A ripple detector 2 is interposed between the ground potential input terminal E of a power source 1 and the ground. The output signal of this detector 2 is inputted to one input terminal of a peak detector 4 through an amplifier 3. A reference voltage source 5 is connected to the other input terminal of the detector 4; and detection signals sent from the amplifier 3 successively are compared with a threshold level from a reference voltage source 5 set to a prescribed value and when the input signal exceeding the threshold level is inputted, it is detected to send an output signal to a register 6. Thus, the voltage of an earth line is monitored all the time and if the detector 4 generates the output signal, the register 6 is set to perform error logging. Then, its generation time, etc., is also logged in an unshown storage device.
JP55183479A 1980-12-24 1980-12-24 Automatic detecting method for earth line noise Pending JPS57106923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55183479A JPS57106923A (en) 1980-12-24 1980-12-24 Automatic detecting method for earth line noise

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55183479A JPS57106923A (en) 1980-12-24 1980-12-24 Automatic detecting method for earth line noise

Publications (1)

Publication Number Publication Date
JPS57106923A true JPS57106923A (en) 1982-07-03

Family

ID=16136519

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55183479A Pending JPS57106923A (en) 1980-12-24 1980-12-24 Automatic detecting method for earth line noise

Country Status (1)

Country Link
JP (1) JPS57106923A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012526989A (en) * 2009-05-12 2012-11-01 ローズマウント インコーポレイテッド System for detecting incomplete process ground connections

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012526989A (en) * 2009-05-12 2012-11-01 ローズマウント インコーポレイテッド System for detecting incomplete process ground connections

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