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I have motors ( 10 units )each one is 90kw 380V 50 HZ 1000rpm
but new local pwer is 220v 60 hz
requierd rpm should be 1000
pleas what the beast solution is used frequncy converter or
rewinding all motos or chang all motors
thanks
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Answer / s.sakthivel perambalur
DEAR NOW AUTOMATIC FREQUENCY DRIVE AVAILABLE UPTO YOUR
REQUIREMENT (SIEMENS MAKE)
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / shoeb
yuo need two cdevice one is auto transformer from which yuo
can adjust the voltage and other is cyclo converters whisc
can vary that 60hz frequency to 50 hz
| Is This Answer Correct ? | 3 Yes | 0 No |
VFD/ gear box is mandatory as 1000 rpm can not be the
synchronous speed with supply at 60Hz.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / anjireddy boduggam
It is mandatory to install two devices:- 1) one device for
voltage adjustment 380v/220v 2)second device for HZ
Converter from 50hz/60hz, but as per technical knowledge
better to change them to suitable motors for 380 Volts / 50
HZ as the cost of Transformers (9nos.) and frequency
converters(50 HZ./60 HZ.) is more than the requirement.
| Is This Answer Correct ? | 0 Yes | 0 No |
The existing motors cannot be used. Voltage and frequency
is wrong.
The second issue is the speed - 1000 rpm uses a 6 pole
motor at 50Hz. 6 pole at 60Hz is 1200 rpm and 8 pole is 900
rpm.
You will need to change the voltage and frequency.
If the motors are belt drive changing the ratio of the
pulleys will fix the problem of speed.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / k m sarafuzzaman
We Have to instolation A step up transfarmer.
| Is This Answer Correct ? | 1 Yes | 5 No |
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