JPS5876775A - Electric leak detecting apparatus - Google Patents

Electric leak detecting apparatus

Info

Publication number
JPS5876775A
JPS5876775A JP56174774A JP17477481A JPS5876775A JP S5876775 A JPS5876775 A JP S5876775A JP 56174774 A JP56174774 A JP 56174774A JP 17477481 A JP17477481 A JP 17477481A JP S5876775 A JPS5876775 A JP S5876775A
Authority
JP
Japan
Prior art keywords
leak
electric
switch
electric leak
current transformer
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
JP56174774A
Other languages
Japanese (ja)
Inventor
Kinya Tatsumi
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 JP56174774A priority Critical patent/JPS5876775A/en
Publication of JPS5876775A publication Critical patent/JPS5876775A/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
    • H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/33—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers

Abstract

PURPOSE:To attain an electric leak detecting apparatus of small size and light weight without a need of using leak breakers by a construction wherein an external outgoing coil in a power on/off switch is excited with a leak current passing through a O-phase current transformer provided in a housing into which coated electric wires are inserted. CONSTITUTION:A O-phase current transformer 6a is provided in a housing of an electric leak detector 6 into which are inserted a pair of coated electric wires 5. When an electric leak is detected through the current transformer 6a, such a current flows into an external outgoing coil 4K in a power on/off switch 4 via an amplification circuit 6b and a switching circuit 6c, so that the switch 4 is turned off and circuit breaking due to an electric leak is effected. Thus, if becomes possible to attain an electric leak detecting apparatus of light weight and small size without a need of using leak breakers.
JP56174774A 1981-10-30 1981-10-30 Electric leak detecting apparatus Pending JPS5876775A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56174774A JPS5876775A (en) 1981-10-30 1981-10-30 Electric leak detecting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56174774A JPS5876775A (en) 1981-10-30 1981-10-30 Electric leak detecting apparatus

Publications (1)

Publication Number Publication Date
JPS5876775A true JPS5876775A (en) 1983-05-09

Family

ID=15984427

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56174774A Pending JPS5876775A (en) 1981-10-30 1981-10-30 Electric leak detecting apparatus

Country Status (1)

Country Link
JP (1) JPS5876775A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404406A2 (en) * 1989-06-21 1990-12-27 Orc Manufacturing Co., Ltd. Light source unit for using exposure

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4913346U (en) * 1972-05-09 1974-02-04

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4913346U (en) * 1972-05-09 1974-02-04

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404406A2 (en) * 1989-06-21 1990-12-27 Orc Manufacturing Co., Ltd. Light source unit for using exposure

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