JPS5425449A - Protective realy - Google Patents

Protective realy

Info

Publication number
JPS5425449A
JPS5425449A JP8984777A JP8984777A JPS5425449A JP S5425449 A JPS5425449 A JP S5425449A JP 8984777 A JP8984777 A JP 8984777A JP 8984777 A JP8984777 A JP 8984777A JP S5425449 A JPS5425449 A JP S5425449A
Authority
JP
Japan
Prior art keywords
realy
protective
level comparator
relay
mal
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
JP8984777A
Other languages
Japanese (ja)
Inventor
Hideyuki Nakano
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP8984777A priority Critical patent/JPS5425449A/en
Publication of JPS5425449A publication Critical patent/JPS5425449A/en
Pending legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE: To prevent the mal-operation of relay by detecting the disconnection of transformer or of line by closing protective relay when the first level comparator is in operation and the second level comparator is not in operation.
COPYRIGHT: (C)1979,JPO&Japio
JP8984777A 1977-07-28 1977-07-28 Protective realy Pending JPS5425449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8984777A JPS5425449A (en) 1977-07-28 1977-07-28 Protective realy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8984777A JPS5425449A (en) 1977-07-28 1977-07-28 Protective realy

Publications (1)

Publication Number Publication Date
JPS5425449A true JPS5425449A (en) 1979-02-26

Family

ID=13982152

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8984777A Pending JPS5425449A (en) 1977-07-28 1977-07-28 Protective realy

Country Status (1)

Country Link
JP (1) JPS5425449A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05118719A (en) * 1991-10-15 1993-05-14 Sanden Corp Revolution control of motor-driven compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05118719A (en) * 1991-10-15 1993-05-14 Sanden Corp Revolution control of motor-driven compressor

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