JPS55143460A - Current detector - Google Patents

Current detector

Info

Publication number
JPS55143460A
JPS55143460A JP12679978A JP12679978A JPS55143460A JP S55143460 A JPS55143460 A JP S55143460A JP 12679978 A JP12679978 A JP 12679978A JP 12679978 A JP12679978 A JP 12679978A JP S55143460 A JPS55143460 A JP S55143460A
Authority
JP
Japan
Prior art keywords
current
voltage
resistance
secondary side
zener diode
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
JP12679978A
Other languages
Japanese (ja)
Other versions
JPH0122588B2 (en
Inventor
Ryusuke Udagawa
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 JP12679978A priority Critical patent/JPS55143460A/en
Publication of JPS55143460A publication Critical patent/JPS55143460A/en
Publication of JPH0122588B2 publication Critical patent/JPH0122588B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measurement Of Current Or Voltage (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE: To miniature and price-low a current transformer by lowering the linear region of the secondary side of the current transformer by decreasing the detection voltage across the secondary side when a large current flows.
CONSTITUTION: Secondary current (i) detected by current transformer 1 for current detection is full-wave-rectified by rectifier 2 and across resistance 3 and Zener diode 4, voltage Vx is developed by current i1 flowing through resistance 3 and Zener diode 4. Once a fine current flows through the secondary side of rectifier 1, voltage Vx becomes equal to the Zener voltage across Zener diode 4 suddenly and the gradient increases by the resistance value of resistance 3 together with current (i).
COPYRIGHT: (C)1980,JPO&Japio
JP12679978A 1978-10-17 1978-10-17 Current detector Granted JPS55143460A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12679978A JPS55143460A (en) 1978-10-17 1978-10-17 Current detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12679978A JPS55143460A (en) 1978-10-17 1978-10-17 Current detector

Publications (2)

Publication Number Publication Date
JPS55143460A true JPS55143460A (en) 1980-11-08
JPH0122588B2 JPH0122588B2 (en) 1989-04-27

Family

ID=14944234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12679978A Granted JPS55143460A (en) 1978-10-17 1978-10-17 Current detector

Country Status (1)

Country Link
JP (1) JPS55143460A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102520232A (en) * 2009-11-26 2012-06-27 华为技术有限公司 Current sampling device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102520232A (en) * 2009-11-26 2012-06-27 华为技术有限公司 Current sampling device

Also Published As

Publication number Publication date
JPH0122588B2 (en) 1989-04-27

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