JPS574558A - Device for monitoring insulation of electric equipment - Google Patents

Device for monitoring insulation of electric equipment

Info

Publication number
JPS574558A
JPS574558A JP7878780A JP7878780A JPS574558A JP S574558 A JPS574558 A JP S574558A JP 7878780 A JP7878780 A JP 7878780A JP 7878780 A JP7878780 A JP 7878780A JP S574558 A JPS574558 A JP S574558A
Authority
JP
Japan
Prior art keywords
cpu3
measured
current
measuring
variation
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.)
Granted
Application number
JP7878780A
Other languages
Japanese (ja)
Other versions
JPS6256987B2 (en
Inventor
Akio Hara
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.)
Toyo Seikan Group Holdings Ltd
Original Assignee
Toyo Seikan Kaisha 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 Toyo Seikan Kaisha Ltd filed Critical Toyo Seikan Kaisha Ltd
Priority to JP7878780A priority Critical patent/JPS574558A/en
Publication of JPS574558A publication Critical patent/JPS574558A/en
Publication of JPS6256987B2 publication Critical patent/JPS6256987B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults

Landscapes

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

Abstract

PURPOSE:To enable to monitor the variation in the insulation resistance of the electrical equipment by measuring the secondary current of each current transformer and comparing the measured result with the average value in the past. CONSTITUTION:The secondary current of instrument current transformers and zero phase current transformers CT1-CTn are sequentially supplied to measuring circuits K1-K3 via switches SW1 and SW2 and measured. Said measuring circuits K1-K3 have different measuring range, and are selected based on the magnitudes of the currents. Thus the accurate test is performed. The measured results are converted in an A/D converter 2 and supplied to a CPU3. The CPU3 compares said value with the average value obtained from the past measured values of each current transformer. When the CPU3 recognizes the abnormal value, it drives a warning device 6 to announce warning. By performing such a test at every specified time by the command of the CPU3, the variation in the insulation resistance which would result the leak can be monitored at all times.
JP7878780A 1980-06-11 1980-06-11 Device for monitoring insulation of electric equipment Granted JPS574558A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7878780A JPS574558A (en) 1980-06-11 1980-06-11 Device for monitoring insulation of electric equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7878780A JPS574558A (en) 1980-06-11 1980-06-11 Device for monitoring insulation of electric equipment

Publications (2)

Publication Number Publication Date
JPS574558A true JPS574558A (en) 1982-01-11
JPS6256987B2 JPS6256987B2 (en) 1987-11-28

Family

ID=13671587

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7878780A Granted JPS574558A (en) 1980-06-11 1980-06-11 Device for monitoring insulation of electric equipment

Country Status (1)

Country Link
JP (1) JPS574558A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003202357A (en) * 2001-11-01 2003-07-18 Toshiba Corp Method and apparatus for insulation monitoring

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003202357A (en) * 2001-11-01 2003-07-18 Toshiba Corp Method and apparatus for insulation monitoring

Also Published As

Publication number Publication date
JPS6256987B2 (en) 1987-11-28

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