JPS54161043A - Overload protection device for transformer - Google Patents

Overload protection device for transformer

Info

Publication number
JPS54161043A
JPS54161043A JP6952878A JP6952878A JPS54161043A JP S54161043 A JPS54161043 A JP S54161043A JP 6952878 A JP6952878 A JP 6952878A JP 6952878 A JP6952878 A JP 6952878A JP S54161043 A JPS54161043 A JP S54161043A
Authority
JP
Japan
Prior art keywords
load
transformer
value
combination power
powers
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
JP6952878A
Other languages
Japanese (ja)
Inventor
Katsutoshi Takahashi
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 JP6952878A priority Critical patent/JPS54161043A/en
Publication of JPS54161043A publication Critical patent/JPS54161043A/en
Pending legal-status Critical Current

Links

Landscapes

  • Protection Of Transformers (AREA)

Abstract

PURPOSE: To disconnect a load rapidly and properly by forming all possible load combination power values by an electrical means, comparing the values with a reference value, and determining the load to be disconnected.
CONSTITUTION: An overload detection unit F comprises an integration circuit SK resembling the overload characteristic of a transformer, integrates transformer feed powers PB1, PB2..., and generates an overload detection signal FSK when the integrated value is within a predetermined working range. A selection arithmetic unit E is fed with load powers P1, P2... as inputs, compares the load combination power values with a predetermined transformer allowable-load reference value PR by means of a comparator, finds out the load combination power value which is over and nearest to the value PR, and disconnects the relevant load.
COPYRIGHT: (C)1979,JPO&Japio
JP6952878A 1978-06-09 1978-06-09 Overload protection device for transformer Pending JPS54161043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6952878A JPS54161043A (en) 1978-06-09 1978-06-09 Overload protection device for transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6952878A JPS54161043A (en) 1978-06-09 1978-06-09 Overload protection device for transformer

Publications (1)

Publication Number Publication Date
JPS54161043A true JPS54161043A (en) 1979-12-20

Family

ID=13405304

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6952878A Pending JPS54161043A (en) 1978-06-09 1978-06-09 Overload protection device for transformer

Country Status (1)

Country Link
JP (1) JPS54161043A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4772978A (en) * 1985-10-14 1988-09-20 Hitachi, Ltd. Transformer protection system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4772978A (en) * 1985-10-14 1988-09-20 Hitachi, Ltd. Transformer protection system

Similar Documents

Publication Publication Date Title
JPS54161043A (en) Overload protection device for transformer
JPS5587060A (en) Overload operation unit
JPS552354A (en) Power circuit
JPS5471347A (en) State detector
JPS54162150A (en) Power supply observer
JPS54162149A (en) Neutral grounding monitor of generator
JPS5468950A (en) Short-circuit protective relay system
JPS5482615A (en) Controller for ac motor
JPS541846A (en) Automatic current limiter
JPS548857A (en) Reclosed circuit device of breaker
JPS5467321A (en) Supervisory circuit for power supply
JPS5698659A (en) Microwave power monitoring circuit
JPS54115724A (en) Current limiting method for motor
JPS5317948A (en) Protective circuit for overcurrent
JPS5674544A (en) Controller of airconditioner
JPS55684A (en) Power unit for aural amplifier
JPS5538046A (en) Transformer for condenser type meter
JPS5636719A (en) Overcurrent protecting circuit of switching regulator
JPS5627421A (en) Protecting circuit
JPS57202878A (en) Protecting device for inverter
JPS5759492A (en) Protecting method for imduction motor
JPS52147946A (en) Protection device for amplifier
JPS5682917A (en) Constant-voltage direct-current power circuit
JPS5641774A (en) Method and device for operating power source device using inverter device
JPS5759493A (en) Overcurrent detecting system at variable frequency controlling time