JPS6431057A - Current supply detector - Google Patents

Current supply detector

Info

Publication number
JPS6431057A
JPS6431057A JP18811287A JP18811287A JPS6431057A JP S6431057 A JPS6431057 A JP S6431057A JP 18811287 A JP18811287 A JP 18811287A JP 18811287 A JP18811287 A JP 18811287A JP S6431057 A JPS6431057 A JP S6431057A
Authority
JP
Japan
Prior art keywords
current
photoisolator
output
trq1
detector
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
JP18811287A
Other languages
Japanese (ja)
Inventor
Jiro Seki
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP18811287A priority Critical patent/JPS6431057A/en
Publication of JPS6431057A publication Critical patent/JPS6431057A/en
Pending legal-status Critical Current

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  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE:To obtain a detector usable as a general-purpose one and requiring no large current transformer, by regulating the current-amplification factor of a voltage converting circuit and that of a current amplifying circuit. CONSTITUTION:When a current is supplied to load L from an AC power source Vs, AC voltage is induced on the side of secondary winding by the current flowing to the primary winding of a two-phase winding coil L1 and AC output is inputted to a photoisolator PA. By this method, a light emitting diode emits light at every half wave output to input the same to the base of a phototransistor. Further, the output of the photoisolator PA is inputted to a transistor (TR)Q1 through a base resistor R2 and a relay RY1 is driven by turning TRQ1 ON to change over a relay contact r1. A current supply state can be detected on the basis of the change-over state of the relay contact r1. The regulation of a detected current is performed by regulating the current-amplification factor of the photoisolator PA and that of the TRQ1. Therefore, a detector can be used as a general purpose one.
JP18811287A 1987-07-28 1987-07-28 Current supply detector Pending JPS6431057A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18811287A JPS6431057A (en) 1987-07-28 1987-07-28 Current supply detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18811287A JPS6431057A (en) 1987-07-28 1987-07-28 Current supply detector

Publications (1)

Publication Number Publication Date
JPS6431057A true JPS6431057A (en) 1989-02-01

Family

ID=16217911

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18811287A Pending JPS6431057A (en) 1987-07-28 1987-07-28 Current supply detector

Country Status (1)

Country Link
JP (1) JPS6431057A (en)

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