JPS54103588A - Ground-fault detector - Google Patents

Ground-fault detector

Info

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
Application number
JP1022178A
Other languages
Japanese (ja)
Other versions
JPS5910509B2 (en
Inventor
Yukio Miyazaki
Mitsugi Takeda
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP53010221A priority Critical patent/JPS5910509B2/en
Publication of JPS54103588A publication Critical patent/JPS54103588A/en
Publication of JPS5910509B2 publication Critical patent/JPS5910509B2/en
Expired legal-status Critical Current

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
JP53010221A 1978-01-31 1978-01-31 Ground fault detection device Expired JPS5910509B2 (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52167973U (en) * 1976-06-11 1977-12-20

Patent Citations (1)

* Cited by examiner, † Cited by third party
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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