JPS56157284A - Start limit indicator for induction motor - Google Patents

Start limit indicator for induction motor

Info

Publication number
JPS56157284A
JPS56157284A JP6137080A JP6137080A JPS56157284A JP S56157284 A JPS56157284 A JP S56157284A JP 6137080 A JP6137080 A JP 6137080A JP 6137080 A JP6137080 A JP 6137080A JP S56157284 A JPS56157284 A JP S56157284A
Authority
JP
Japan
Prior art keywords
motor
closed
indicator
contact
opened
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
JP6137080A
Other languages
Japanese (ja)
Inventor
Riyuunosuke Nioka
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 JP6137080A priority Critical patent/JPS56157284A/en
Publication of JPS56157284A publication Critical patent/JPS56157284A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
    • H02P1/02—Details

Abstract

PURPOSE:To prolong the lifetime of an induction motor by providing a temperature relay having the same characteristics as the heat dissipating characteristics of the motor to operate an indicator, thereby preventing the start of the motor exceeding the allowable starting frequency. CONSTITUTION:When the breaker of an induction motor is closed, its auxiliary normaly open contact 2a is closed, a current will flow through a temperature relay 3 having the same characteristics as the heat dissipating characteristics of the motor, and the output contact 4 is closed after a predetermined time. Since an auxiliary normally closed contact 2b is opened at this time, the indicator 5 is not energized. When the breaker is then opened, the contact 2b is closed, and the indicator 5 continues to turn ON until the output contact 4 of the relay 3 is opened. Accordingly, the indicator 5 can be turned ON until the temperature of the motor becomes a predetermined level, thereby monitoring the restart and preventing the restart more than required and thus prolonging the lifetime of the motor.
JP6137080A 1980-05-08 1980-05-08 Start limit indicator for induction motor Pending JPS56157284A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6137080A JPS56157284A (en) 1980-05-08 1980-05-08 Start limit indicator for induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6137080A JPS56157284A (en) 1980-05-08 1980-05-08 Start limit indicator for induction motor

Publications (1)

Publication Number Publication Date
JPS56157284A true JPS56157284A (en) 1981-12-04

Family

ID=13169208

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6137080A Pending JPS56157284A (en) 1980-05-08 1980-05-08 Start limit indicator for induction motor

Country Status (1)

Country Link
JP (1) JPS56157284A (en)

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