JPS54103588A - Ground-fault detector - Google Patents
Ground-fault detectorInfo
- Publication number
- JPS54103588A JPS54103588A JP1022178A JP1022178A JPS54103588A JP S54103588 A JPS54103588 A JP S54103588A JP 1022178 A JP1022178 A JP 1022178A JP 1022178 A JP1022178 A JP 1022178A JP S54103588 A JPS54103588 A JP S54103588A
- Authority
- JP
- Japan
- Prior art keywords
- differential amplifier
- constant current
- current source
- amplifier
- temperature characteristics
- 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.)
- Granted
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Locating Faults (AREA)
Abstract
PURPOSE: To make temperature characteristics better and also to make sensitivity higher as well as permit the low consumption of power by the procedure in which amplifier is made up of pre-differential amplifier and after-differential amplifier, time-delay circuit is made up of constant current source and condenser, and waveform-shaping circui uses transistor circuit.
CONSTITUTION: The amplifier 4 is made up, in a two-stage series connection manner, of the pre-differential amplifier 37 consisting of the constant current source 28, the transistors 24 and 25, etc., and the after-differential amplifier 38 consisting of the constant current source 36, the diode 34, etc., in such a way that it can be used with one power source and high gain and further temperature characteristics can be raised by using semiconductive element of a negative temperature coefficient. The time-delay circuit 5 is made up of diode, transistor, etc., and the output of the differential amplifier is made up of high gain and constant current source 17. The waveform-shaping circuit 6 is of a thyristor configulation and also capable of taking out the current at non-operating time as output current at operating time. Thus, temperature characteristics can be made better and also high sensitivity can be attained with a low consumption of power.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53010221A JPS5910509B2 (en) | 1978-01-31 | 1978-01-31 | Ground fault detection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53010221A JPS5910509B2 (en) | 1978-01-31 | 1978-01-31 | Ground fault detection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54103588A true JPS54103588A (en) | 1979-08-15 |
JPS5910509B2 JPS5910509B2 (en) | 1984-03-09 |
Family
ID=11744211
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53010221A Expired JPS5910509B2 (en) | 1978-01-31 | 1978-01-31 | Ground fault detection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5910509B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52167973U (en) * | 1976-06-11 | 1977-12-20 |
-
1978
- 1978-01-31 JP JP53010221A patent/JPS5910509B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52167973U (en) * | 1976-06-11 | 1977-12-20 |
Also Published As
Publication number | Publication date |
---|---|
JPS5910509B2 (en) | 1984-03-09 |
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