JPS5733369A - Alternating leakage current detecting circuit - Google Patents

Alternating leakage current detecting circuit

Info

Publication number
JPS5733369A
JPS5733369A JP10707480A JP10707480A JPS5733369A JP S5733369 A JPS5733369 A JP S5733369A JP 10707480 A JP10707480 A JP 10707480A JP 10707480 A JP10707480 A JP 10707480A JP S5733369 A JPS5733369 A JP S5733369A
Authority
JP
Japan
Prior art keywords
circuit
output
leakage current
prescribed
time delay
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
JP10707480A
Other languages
Japanese (ja)
Inventor
Shoichi Fukazawa
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP10707480A priority Critical patent/JPS5733369A/en
Publication of JPS5733369A publication Critical patent/JPS5733369A/en
Pending 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 permit instantaneous return to the initial potential at the noninputting by dropping the output of a time delay circuit to ground potential when the continuous AC leakage current exceeding a prescribed threshold value lowers below the threshold value before a prescribed time. CONSTITUTION:Input current (leakage current of a constant frequency) from an AC electric power source 1 is applied to a differential amplifier 2 having prescribed offset voltage. This output is supplied via a buffer circuit 3 to a time delay circuit 4. On the other hand, a control circuti 6 detects the output pulses of the amplifier 2, and controls a reset bias circuit 7. When the AC input lowers below the offset voltage before the prescribed time, a pulling down circuit 8 is operated by the output of the bias circuit 7, and the output of a time delay circuit 4 is dropped to ground potential. In this way, it is returned instantaneously to the initial potential at the noninputting. Hence, the inconvenience by the residual potential of the circuit 4 is prevented.
JP10707480A 1980-08-06 1980-08-06 Alternating leakage current detecting circuit Pending JPS5733369A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10707480A JPS5733369A (en) 1980-08-06 1980-08-06 Alternating leakage current detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10707480A JPS5733369A (en) 1980-08-06 1980-08-06 Alternating leakage current detecting circuit

Publications (1)

Publication Number Publication Date
JPS5733369A true JPS5733369A (en) 1982-02-23

Family

ID=14449818

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10707480A Pending JPS5733369A (en) 1980-08-06 1980-08-06 Alternating leakage current detecting circuit

Country Status (1)

Country Link
JP (1) JPS5733369A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5346519B1 (en) * 1970-06-30 1978-12-14

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5346519B1 (en) * 1970-06-30 1978-12-14

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