JPS5476942A - Leak breaker - Google Patents
Leak breakerInfo
- 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
Links
Landscapes
- 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
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) |
-
1977
- 1977-11-30 JP JP14449177A patent/JPS5476942A/en active Pending
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