JPS5482016A - Prevention system from self-excitation in induction motor at power reception interruption - Google Patents

Prevention system from self-excitation in induction motor at power reception interruption

Info

Publication number
JPS5482016A
JPS5482016A JP15024677A JP15024677A JPS5482016A JP S5482016 A JPS5482016 A JP S5482016A JP 15024677 A JP15024677 A JP 15024677A JP 15024677 A JP15024677 A JP 15024677A JP S5482016 A JPS5482016 A JP S5482016A
Authority
JP
Japan
Prior art keywords
excitation
self
breaker
power receiving
receiving point
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
JP15024677A
Other languages
Japanese (ja)
Inventor
Yoji Takada
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15024677A priority Critical patent/JPS5482016A/en
Publication of JPS5482016A publication Critical patent/JPS5482016A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE: To make a prevention from a phenomenon of self-excitation, by such manner that with a detector, for detecting an in-flow current from power receiving point becoming below the specified value, provided, an operation of said detector be made to release a parallel condition between motor and condenser.
CONSTITUTION: With a normal voltage being fed to a power receiving point 1, when a reception of power is stopped during an operation of a motor 11 under condition of a breaker 8 closing and a breaker 12 closing, a current flowing into a secondary bus 7 of a transformer 5 from the power receiving point 1 comes to be zero. Accordingly, with an inflow current, from the power receiving point 1, detected for becoming below the specified value (a value approximate to zero) by a detector 16, the breaker 12, for switching the condenser, will be made open. With the breaker 12 made open, the state of parallel connection between the motor 11 and the condenser 15 comes to be in a state of release, not generating a phenomenon of self-excitation.
COPYRIGHT: (C)1979,JPO&Japio
JP15024677A 1977-12-13 1977-12-13 Prevention system from self-excitation in induction motor at power reception interruption Pending JPS5482016A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15024677A JPS5482016A (en) 1977-12-13 1977-12-13 Prevention system from self-excitation in induction motor at power reception interruption

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15024677A JPS5482016A (en) 1977-12-13 1977-12-13 Prevention system from self-excitation in induction motor at power reception interruption

Publications (1)

Publication Number Publication Date
JPS5482016A true JPS5482016A (en) 1979-06-29

Family

ID=15492743

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15024677A Pending JPS5482016A (en) 1977-12-13 1977-12-13 Prevention system from self-excitation in induction motor at power reception interruption

Country Status (1)

Country Link
JP (1) JPS5482016A (en)

Similar Documents

Publication Publication Date Title
JPS57142568A (en) Earth trouble detecting device for dc power transmission system
JPS5482016A (en) Prevention system from self-excitation in induction motor at power reception interruption
JPS52153351A (en) Automatic clearing device
JPS57126274A (en) Protecting system for converter
JPS5489212A (en) Scherbius device
JPS5376444A (en) Arc power detecting system for each phase in three-phase arc furnace
JPS54106840A (en) Earth-fault directional relay system
JPS569816A (en) Protecting method of electric power converter
JPS54129343A (en) Net work power receiving equipment
JPS52103652A (en) Starter
JPS54115751A (en) Transformer tap position selector
JPS5468950A (en) Short-circuit protective relay system
JPS5538046A (en) Transformer for condenser type meter
JPS52107529A (en) Overcurrent detector circuit for dc-dc convertor
JPS5479419A (en) Lost power source detecting device
JPS57180356A (en) Exciter for synchronous machine
JPS52101444A (en) Tripping circuit for leakage breaker
JPS5429004A (en) Charger for vehicle
JPS52154059A (en) Protective device for dc motor
JPS52150515A (en) Fault detector for inverter
JPS54113841A (en) Automatic switching device of bus bar
JPS52120353A (en) Protective device for dc power transmission system
JPS547127A (en) Overcurrent detector for inverter
JPS5340847A (en) Reclosing protector for converter
JPS54122844A (en) Earthing protection relay system