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WHAT IS THE EFFECT OF UNDER VOLTAGE ‎ON 3 PHASE INDUCTION MOTOR ?‎

Electrical Controls Low Voltage
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Question added by Osama Mohamed Abd ElGayed Abd Allah , Assistant Chief Engineer , فندق موفنبيك الدوحة
Date Posted: 2013/05/06
Upvote (1) Views (34) Followers (5) Answers (6) Report Question
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Mohamed Mahmoud
by Mohamed Mahmoud , Electrical Tendering manager , Saudi Electricity Company

this issue depending on the actual absorbed load torque, for example if the load is half of FL motor torque the motor will run w/o problem.
it's like variable voltage control for AC motor.

Ahmed Sabry Omr abdel-atty
by Ahmed Sabry Omr abdel-atty , Electrical ESP & HPS Engineer , Red Sea Oil Services co.

Over Load, because the motor power is constant, if voltage goes down, current goes up.

Omar Hayat
by Omar Hayat , Senior Electrician , Bestway Cement

Motor gives abnormal sound and not work on its full load

dumadi yusuf
by dumadi yusuf , electrical project engineer , PT TITAN CIPTA SINERGY

The effect of under volatge on three phase motor is running not normally because the power motor not optimal so if the load increase can effect to the motor overload (trip)

Alaa Alsouradi
by Alaa Alsouradi , Service Engineer , Rieckermann services Ltd

Over current, because the motor consume the same power

munther khatib
by munther khatib , Senior project manager , Alfanar Construction Company

It causes the currents to be increased which means will heat the winding coils.
a good protection should trip the motor in case of under voltage

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