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Operating voltage always plays a very significant role on performance of induction motors which are the machines having a major load share in any industry. Almost 60 % of majority industrial load would be of induction motor and any deviation in their performance will have a effect which is clearly quantifiable.  Â
A simple and effective energy saving measure for any industry to take up is the maintenance of optimum voltage level depending upon the application. Just a OLTC feature in the distribution transformer will help in this regard.
Below are the charts representing effects of overvoltage and under voltage on the motors.
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| Motor Performance at Under Voltage - 90% |
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| Motor Performance at Over Voltage - 110% |
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| Motor Performance at Over Voltage - 120% |
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