JPH01123428U - - Google Patents

Info

Publication number
JPH01123428U
JPH01123428U JP1770688U JP1770688U JPH01123428U JP H01123428 U JPH01123428 U JP H01123428U JP 1770688 U JP1770688 U JP 1770688U JP 1770688 U JP1770688 U JP 1770688U JP H01123428 U JPH01123428 U JP H01123428U
Authority
JP
Japan
Prior art keywords
phase
phase power
power supply
section
signal line
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
JP1770688U
Other languages
English (en)
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 filed Critical
Priority to JP1770688U priority Critical patent/JPH01123428U/ja
Publication of JPH01123428U publication Critical patent/JPH01123428U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Description

【図面の簡単な説明】
第１図は本考案の実施例を示す概略図、第２図
ａは正常時に第１図に示した抵抗の接続点に表わ
れる電圧の波形図、第２図ｂは一相欠相時に第１
図に示した抵抗の接続点に表われる電圧の波形図
である。 １……三相交流電源、２……機器、３……制御
部、４，５……信号線、１３……三相全波整流部
、１６……フオトカプラ、１８……ツエナーダイ
オード。

Claims (1)

    【実用新案登録請求の範囲】
  1. 三相電源端子に三相電源が供給されて成る機器
    と、この機器へ信号線を介して制御信号を送信す
    る制御部とから成り、この機器に接続される三相
    電源の欠相状態を検出する検知回路において、夫
    々の三相電源端子に夫々の交流入力端子が接続さ
    れた三相全波整流回路部と、この三相整流全波回
    路部の整流出力電圧でＯＮ／ＯＦＦ状態が制御さ
    れるフオトカプラ部とを有し、このフオトカプラ
    部のＯＮ／ＯＦＦで信号線の接続と遮断とを行な
    うことを特徴とした三相電源の欠相検知回路。
JP1770688U 1988-02-12 1988-02-12 Pending JPH01123428U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1770688U JPH01123428U (ja) 1988-02-12 1988-02-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1770688U JPH01123428U (ja) 1988-02-12 1988-02-12

Publications (1)

Publication Number Publication Date
JPH01123428U true JPH01123428U (ja) 1989-08-22

Family

ID=31231727

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1770688U Pending JPH01123428U (ja) 1988-02-12 1988-02-12

Country Status (1)

Country Link
JP (1) JPH01123428U (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001296324A (ja) * 2000-04-18 2001-10-26 Yaskawa Electric Corp ３相電源欠相検出回路
JP2009207329A (ja) * 2008-02-29 2009-09-10 Daikin Ind Ltd 過電圧保護回路

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61139220A (ja) * 1984-12-12 1986-06-26 日本電気株式会社 三相交流の欠相検出回路

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61139220A (ja) * 1984-12-12 1986-06-26 日本電気株式会社 三相交流の欠相検出回路

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001296324A (ja) * 2000-04-18 2001-10-26 Yaskawa Electric Corp ３相電源欠相検出回路
JP2009207329A (ja) * 2008-02-29 2009-09-10 Daikin Ind Ltd 過電圧保護回路

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