JPS55149872A - Voltage drop detector for ac power supply - Google Patents

Voltage drop detector for ac power supply

Info

Publication number
JPS55149872A
JPS55149872A JP10369778A JP10369778A JPS55149872A JP S55149872 A JPS55149872 A JP S55149872A JP 10369778 A JP10369778 A JP 10369778A JP 10369778 A JP10369778 A JP 10369778A JP S55149872 A JPS55149872 A JP S55149872A
Authority
JP
Japan
Prior art keywords
output
circuit
becomes
power supply
voltage drop
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
JP10369778A
Other languages
Japanese (ja)
Inventor
Hiroshi Nakajima
Hideo Kobayashi
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 JP10369778A priority Critical patent/JPS55149872A/en
Publication of JPS55149872A publication Critical patent/JPS55149872A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To detect an abnormal drop of AC input voltage exactly and momentarily by detecting a change of AC input voltage by every half-cycle of the AC.
CONSTITUTION: While the AC supply output drops continuously and the rectified output of the full-wave rectification circuit 31 becomes continuously lower than a reference voltage, the capacitor 33 keeps being charged since the output of the operation amplifier 25 is "0" and the switching circuit 32 is "off". The emitter output of the transistor circuit 35 becomes "1" level, and when a fixed time has elapsed after putting the power switch on, the output of the charging timer circuit 28 becomes "1" also, the NAND gate circuit 27 emits a warning signal of "0" level.
COPYRIGHT: (C)1980,JPO&Japio
JP10369778A 1978-08-25 1978-08-25 Voltage drop detector for ac power supply Pending JPS55149872A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10369778A JPS55149872A (en) 1978-08-25 1978-08-25 Voltage drop detector for ac power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10369778A JPS55149872A (en) 1978-08-25 1978-08-25 Voltage drop detector for ac power supply

Publications (1)

Publication Number Publication Date
JPS55149872A true JPS55149872A (en) 1980-11-21

Family

ID=14360954

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10369778A Pending JPS55149872A (en) 1978-08-25 1978-08-25 Voltage drop detector for ac power supply

Country Status (1)

Country Link
JP (1) JPS55149872A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6874631B1 (en) 1999-06-07 2005-04-05 Fuji Photo Film Co., Ltd. Magnetic tape cassette storage case
JP2015525556A (en) * 2012-06-05 2015-09-03 ファイン インコーポレイテッドＦｉｎｅ Ｉｎｃ． Power interruption device for electroosmotic dehydrator using electrostatic voltage
JP2018004474A (en) * 2016-07-04 2018-01-11 日本特殊陶業株式会社 Current measuring device and fine particle detection device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6874631B1 (en) 1999-06-07 2005-04-05 Fuji Photo Film Co., Ltd. Magnetic tape cassette storage case
JP2015525556A (en) * 2012-06-05 2015-09-03 ファイン インコーポレイテッドＦｉｎｅ Ｉｎｃ． Power interruption device for electroosmotic dehydrator using electrostatic voltage
JP2018004474A (en) * 2016-07-04 2018-01-11 日本特殊陶業株式会社 Current measuring device and fine particle detection device

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