JPS54121176A - Leak detector - Google Patents
Leak detectorInfo
- Publication number
- JPS54121176A JPS54121176A JP2816578A JP2816578A JPS54121176A JP S54121176 A JPS54121176 A JP S54121176A JP 2816578 A JP2816578 A JP 2816578A JP 2816578 A JP2816578 A JP 2816578A JP S54121176 A JPS54121176 A JP S54121176A
- Authority
- JP
- Japan
- Prior art keywords
- current transformer
- phase current
- output
- zero phase
- circuit
- 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
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE: To make possible small size, high sensitivity and high speed without the need for increasing the output of the zero phase current transformer by so arranging the detector that even if the output of the zero phase current transformer in the leak detector is of a low level the detection operation is surely performed.
CONSTITUTION: When leak occurs in AC electric lines L1, L2 and an unbalance current flows, the secondary side induced voltage of a zero phase current transformer ZCT changes. This secondary output is accumulated in the capacitor C of a rectifying smoothing circuit F and in addition when the abovementioned secondary output becomes of the specified value, the voltage detecting element SL of a voltage detecting circuit E which detects the output voltage by directely connecting to the zero phase current transformer ZCT emits light, causing the switching element of a driving circuit S to conduct. Hence, the energy stored in the capacitor C is discharged through a trip coil TC to drive a trip coil TC which in turn causes a circuit breaker B to break the AC electric lines L1, L2.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2816578A JPS54121176A (en) | 1978-03-10 | 1978-03-10 | Leak detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2816578A JPS54121176A (en) | 1978-03-10 | 1978-03-10 | Leak detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54121176A true JPS54121176A (en) | 1979-09-20 |
Family
ID=12241126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2816578A Pending JPS54121176A (en) | 1978-03-10 | 1978-03-10 | Leak detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54121176A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103269054A (en) * | 2013-04-28 | 2013-08-28 | 乐清共拓电气科技有限公司 | Drive circuit for tripping of switch on high-voltage column |
-
1978
- 1978-03-10 JP JP2816578A patent/JPS54121176A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103269054A (en) * | 2013-04-28 | 2013-08-28 | 乐清共拓电气科技有限公司 | Drive circuit for tripping of switch on high-voltage column |
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