JPS5476942A - Leak breaker - Google Patents

Leak breaker

Info

Publication number
JPS5476942A
JPS5476942A JP14449177A JP14449177A JPS5476942A JP S5476942 A JPS5476942 A JP S5476942A JP 14449177 A JP14449177 A JP 14449177A JP 14449177 A JP14449177 A JP 14449177A JP S5476942 A JPS5476942 A JP S5476942A
Authority
JP
Japan
Prior art keywords
amplifier
current transformer
secondary output
circuit lines
taken out
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
JP14449177A
Other languages
Japanese (ja)
Inventor
Sadao Kawamoto
Hirotsugu Minami
Hiroyuki Miyake
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 JP14449177A priority Critical patent/JPS5476942A/en
Publication of JPS5476942A publication Critical patent/JPS5476942A/en
Pending legal-status Critical Current

Links

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  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE: To protect an amplifier from high voltage noise, by such means that a power source for amplifier be taken out from a secondary output of current transformer, with one of the circuit lines penetrating, simultaneously with a resistor inserted in parallel to across said lines.
CONSTITUTION: In a leak breaker, where a secondary output of zero phase current transformer is fed to an amplifier to drive a tripping and electromagnet device, a power for the amplifier 7 is taken out from a secondary output of a current transformer 10, to which one of the circuit lines is penetrating, simultaneously with a resistor 12 inserted in parallel to across the electric circuit lines. In this way, even for a surge current flowing in the resistor 12 due to a high voltage surge, the current transformer 10 is promptly energized near to a state of saturation, causing the secondary output voltage of the current transformer 10 only to slightly increase, with the amplifier parts never be made voltage destrucution. And as the secondary output of the current transformer, to which one of the amplifier circuit lines penetrates, is taken out, a resistance of the amplifier is not overlapped for insulation measurement, thus capable of obtaining a ture value of measurement.
COPYRIGHT: (C)1979,JPO&Japio
JP14449177A 1977-11-30 1977-11-30 Leak breaker Pending JPS5476942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14449177A JPS5476942A (en) 1977-11-30 1977-11-30 Leak breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14449177A JPS5476942A (en) 1977-11-30 1977-11-30 Leak breaker

Publications (1)

Publication Number Publication Date
JPS5476942A true JPS5476942A (en) 1979-06-20

Family

ID=15363559

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14449177A Pending JPS5476942A (en) 1977-11-30 1977-11-30 Leak breaker

Country Status (1)

Country Link
JP (1) JPS5476942A (en)

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