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JPS52469A - Device for indicating load condition - Google Patents

Device for indicating load condition

Info

Publication number
JPS52469A
JPS52469A JP7722975A JP7722975A JPS52469A JP S52469 A JPS52469 A JP S52469A JP 7722975 A JP7722975 A JP 7722975A JP 7722975 A JP7722975 A JP 7722975A JP S52469 A JPS52469 A JP S52469A
Authority
JP
Japan
Prior art keywords
load condition
indicating load
turn
semiconductor element
signals
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
JP7722975A
Other languages
Japanese (ja)
Inventor
Kunio Murayama
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 Plant Construction Co Ltd
Hitachi Plant Technologies Ltd
Original Assignee
Hitachi Plant Construction Co Ltd
Hitachi Plant Technologies 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 Plant Construction Co Ltd, Hitachi Plant Technologies Ltd filed Critical Hitachi Plant Construction Co Ltd
Priority to JP7722975A priority Critical patent/JPS52469A/en
Publication of JPS52469A publication Critical patent/JPS52469A/en
Pending legal-status Critical Current

Links

Landscapes

  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

PURPOSE: To indicate the operation of load, non-operation, stop of operation due to fault, etc., in the form of turn on, turn off or flashing of indication lamps, by using a-c signals as specific signals and detecting positive waves and negative wa es separately by means of a light-emitting semiconductor element and a photosensitive semiconductor element.
COPYRIGHT: (C)1977,JPO&Japio
JP7722975A 1975-06-23 1975-06-23 Device for indicating load condition Pending JPS52469A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7722975A JPS52469A (en) 1975-06-23 1975-06-23 Device for indicating load condition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7722975A JPS52469A (en) 1975-06-23 1975-06-23 Device for indicating load condition

Publications (1)

Publication Number Publication Date
JPS52469A true JPS52469A (en) 1977-01-05

Family

ID=13628016

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7722975A Pending JPS52469A (en) 1975-06-23 1975-06-23 Device for indicating load condition

Country Status (1)

Country Link
JP (1) JPS52469A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01138934A (en) * 1987-11-26 1989-05-31 Mitsubishi Electric Corp Remote control operator
JPH0294218A (en) * 1988-09-29 1990-04-05 Mitsubishi Electric Corp Remote controlled breaker function monitoring device
JPH0412642A (en) * 1990-04-27 1992-01-17 Mitsubishi Electric Corp Circuit for driving remote control equipment

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4936972B1 (en) * 1968-10-31 1974-10-04

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4936972B1 (en) * 1968-10-31 1974-10-04

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01138934A (en) * 1987-11-26 1989-05-31 Mitsubishi Electric Corp Remote control operator
JPH0294218A (en) * 1988-09-29 1990-04-05 Mitsubishi Electric Corp Remote controlled breaker function monitoring device
JPH0412642A (en) * 1990-04-27 1992-01-17 Mitsubishi Electric Corp Circuit for driving remote control equipment

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