JPS54102554A - Relay with capability of detecting variation - Google Patents

Relay with capability of detecting variation

Info

Publication number
JPS54102554A
JPS54102554A JP917378A JP917378A JPS54102554A JP S54102554 A JPS54102554 A JP S54102554A JP 917378 A JP917378 A JP 917378A JP 917378 A JP917378 A JP 917378A JP S54102554 A JPS54102554 A JP S54102554A
Authority
JP
Japan
Prior art keywords
capacitor
voltage
detection
resistance
normal state
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
JP917378A
Other languages
Japanese (ja)
Inventor
Toshio Ono
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP917378A priority Critical patent/JPS54102554A/en
Publication of JPS54102554A publication Critical patent/JPS54102554A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Current Or Voltage (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE: To ensure accurate trouble detection of super high voltage system and long-distance transmission line by detecting changes in the voltage and the current from the normal state using a charge/discharge waveform of a capacitor.
CONSTITUTION: An AC input 31 is converted into DC current with AC-DC converter 32 and applied to a variation signal generating circuit 50 composed of resistance 33, 34 and 37, a diode 35 and a capacitor 36. The capacitor 36 memorizes the voltage in the normal state. In the normal state, a drop voltage 45 of the diode 35 is applied at the input 42 of a variation detecting circuit to check the output of the circuit is checked. When a trouble occurs, change 41 in the AC current 39 varies a DC conversion output 40, which allows the voltage charged in the capacitor to discharge through the resistance 37. At this point, a discharge waveform determined by the resistance 37 and the capacitor 36 developes at the detection input 42. Accordingly, detecting the waveform with a detection level 44 enables the obtaining of the detection output 43.
COPYRIGHT: (C)1979,JPO&Japio
JP917378A 1978-01-30 1978-01-30 Relay with capability of detecting variation Pending JPS54102554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP917378A JPS54102554A (en) 1978-01-30 1978-01-30 Relay with capability of detecting variation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP917378A JPS54102554A (en) 1978-01-30 1978-01-30 Relay with capability of detecting variation

Publications (1)

Publication Number Publication Date
JPS54102554A true JPS54102554A (en) 1979-08-13

Family

ID=11713180

Family Applications (1)

Application Number Title Priority Date Filing Date
JP917378A Pending JPS54102554A (en) 1978-01-30 1978-01-30 Relay with capability of detecting variation

Country Status (1)

Country Link
JP (1) JPS54102554A (en)

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