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JPS54120841A - Ac power unit - Google Patents

Ac power unit

Info

Publication number
JPS54120841A
JPS54120841A JP2749078A JP2749078A JPS54120841A JP S54120841 A JPS54120841 A JP S54120841A JP 2749078 A JP2749078 A JP 2749078A JP 2749078 A JP2749078 A JP 2749078A JP S54120841 A JPS54120841 A JP S54120841A
Authority
JP
Japan
Prior art keywords
voltage
power unit
hourly
locked
input
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
JP2749078A
Other languages
Japanese (ja)
Other versions
JPS6310650B2 (en
Inventor
Toshihiko Hoshi
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP2749078A priority Critical patent/JPS54120841A/en
Publication of JPS54120841A publication Critical patent/JPS54120841A/en
Publication of JPS6310650B2 publication Critical patent/JPS6310650B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Protection Of Static Devices (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Inverter Devices (AREA)

Abstract

PURPOSE: To make an improvement of the reliability, with a voltage relay locked not to cause a decisive operation through a logical combination, by paying attention to that a rapid change of the input DC voltage to an inverter become a sign for a transient change to the output.
CONSTITUTION: For each AC power unit 1, 2, is provided a voltage surge detector 12, 13 respectively for detecting the hourly differentiated value of an input DC voltage to its inverter. During a period, in which the DC voltage hourly differentiated value detected by either one of said voltage surge detectors is bigger than a level of predetermined value, a voltage relay 11 is locked with a generation stopped of the second signal, and a decisive operation, made by a logical combination between the first and the second signal, is made not to be operated.
COPYRIGHT: (C)1979,JPO&Japio
JP2749078A 1978-03-10 1978-03-10 Ac power unit Granted JPS54120841A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2749078A JPS54120841A (en) 1978-03-10 1978-03-10 Ac power unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2749078A JPS54120841A (en) 1978-03-10 1978-03-10 Ac power unit

Publications (2)

Publication Number Publication Date
JPS54120841A true JPS54120841A (en) 1979-09-19
JPS6310650B2 JPS6310650B2 (en) 1988-03-08

Family

ID=12222566

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2749078A Granted JPS54120841A (en) 1978-03-10 1978-03-10 Ac power unit

Country Status (1)

Country Link
JP (1) JPS54120841A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56134925U (en) * 1980-03-14 1981-10-13
JP2015006029A (en) * 2013-06-19 2015-01-08 三菱電機株式会社 Power converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56134925U (en) * 1980-03-14 1981-10-13
JP2015006029A (en) * 2013-06-19 2015-01-08 三菱電機株式会社 Power converter

Also Published As

Publication number Publication date
JPS6310650B2 (en) 1988-03-08

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