JPS5274848A - Eddy current protective device - Google Patents

Eddy current protective device

Info

Publication number
JPS5274848A
JPS5274848A JP15056575A JP15056575A JPS5274848A JP S5274848 A JPS5274848 A JP S5274848A JP 15056575 A JP15056575 A JP 15056575A JP 15056575 A JP15056575 A JP 15056575A JP S5274848 A JPS5274848 A JP S5274848A
Authority
JP
Japan
Prior art keywords
eddy current
protective device
short
current protective
current
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
JP15056575A
Other languages
Japanese (ja)
Inventor
Kenji Nanto
Nobuo Sakai
Shoji Aso
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 JP15056575A priority Critical patent/JPS5274848A/en
Publication of JPS5274848A publication Critical patent/JPS5274848A/en
Pending legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE: Taking into a consideration the fact that a short-circuited current has a rapid build-up characteristic different from other varying currents, the differential amount of short-circuited current i.e. a varying rate to time is detected to form a current limitig reactor of a low cost and small construction, having a short operating time.
COPYRIGHT: (C)1977,JPO&Japio
JP15056575A 1975-12-19 1975-12-19 Eddy current protective device Pending JPS5274848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15056575A JPS5274848A (en) 1975-12-19 1975-12-19 Eddy current protective device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15056575A JPS5274848A (en) 1975-12-19 1975-12-19 Eddy current protective device

Publications (1)

Publication Number Publication Date
JPS5274848A true JPS5274848A (en) 1977-06-23

Family

ID=15499649

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15056575A Pending JPS5274848A (en) 1975-12-19 1975-12-19 Eddy current protective device

Country Status (1)

Country Link
JP (1) JPS5274848A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS573517A (en) * 1980-06-09 1982-01-09 Mitsubishi Electric Corp Shortcircuit protecting device
JPS58218819A (en) * 1982-06-11 1983-12-20 愛知電機株式会社 Dc high voltage load protecting device
JPS59169547U (en) * 1983-04-28 1984-11-13 新神戸電機株式会社 Current limiting reactor device
JP2012065459A (en) * 2010-09-16 2012-03-29 Nippon Telegr & Teleph Corp <Ntt> Overcurrent detecting device, and overcurrent detecting method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215896A (en) * 1962-10-04 1965-11-02 Gen Electric Fast response overload protection circuit
JPS4935838A (en) * 1972-08-07 1974-04-03
JPS50131051A (en) * 1974-04-03 1975-10-16

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215896A (en) * 1962-10-04 1965-11-02 Gen Electric Fast response overload protection circuit
JPS4935838A (en) * 1972-08-07 1974-04-03
JPS50131051A (en) * 1974-04-03 1975-10-16

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS573517A (en) * 1980-06-09 1982-01-09 Mitsubishi Electric Corp Shortcircuit protecting device
JPS58218819A (en) * 1982-06-11 1983-12-20 愛知電機株式会社 Dc high voltage load protecting device
JPS59169547U (en) * 1983-04-28 1984-11-13 新神戸電機株式会社 Current limiting reactor device
JP2012065459A (en) * 2010-09-16 2012-03-29 Nippon Telegr & Teleph Corp <Ntt> Overcurrent detecting device, and overcurrent detecting method

Similar Documents

Publication Publication Date Title
JPS521287A (en) Numeric value control device
JPS51126894A (en) Voltammetry apparatus
JPS5274848A (en) Eddy current protective device
JPS5240753A (en) Protection method of heater
JPS5223645A (en) Grounding method
JPS51118051A (en) Trigger divice of series capacitor protection gap
JPS525580A (en) Reversibee stop-watch
JPS51111366A (en) Effective value transformation apparatus
JPS51143483A (en) Method of deoxidizing disposal of foods and to preserve the same
JPS51127341A (en) Inverter protective device inverter
JPS51127639A (en) Operation device
JPS51130434A (en) Adhesive
JPS51113141A (en) Protective relay means
JPS5322247A (en) Elevator group controller
JPS5260600A (en) Smoke sensing system
JPS51132696A (en) Sheltering staircase apparatus
JPS51132889A (en) Gas sensitive body
JPS51124214A (en) Point control type signal selecting device
JPS51131658A (en) Level detecting device
JPS51141600A (en) Fire detecting equipment
JPS51126053A (en) Recognition pattern composition for unit detection
JPS51132894A (en) Gas sensitive body
JPS5218291A (en) Vibration machining device
JPS5220246A (en) Protective system for multi-terminal system
JPS5218043A (en) Revolving door safety equipment