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Dears, These motors are for crushers and cement mills main drives where you need 4.4 MW motors. The reason we want to work on 22 KV is that the power tariff for 22KV is less than 11 KV for example. Regards.

Dear jraef, thanks for your reply but I am speaking about asynchronous motors Best regards.

Dears, Would please help me to know the electrical energy tariff in Dubai for 11KV and 22KV. Best regards.

Dears, I know that there are motors working on 6.3 KV , 11 KV , and I would like to know whether there are motors working on 22 KV or not. Also , regarding the motor prices , I would like to know whether the motor price increased with the opertating voltage or what? Best regards.

Dears, I need your help to know wind tuebine plant price , installation cost , and running cost per KWH for wind turbine with the following ratings: 2000 , 2300 , 2500 , 2700 , 3000 , 3600 , 4500 , 5000 KW Best regards.

itsmoked, what happen as follows: ID fan motor , 2 MW slip ring motor , 6 KV , trip by under voltage protection , and some of the contactors lose holding , also VSD trip , but not so frequently by a fault , so please advise how to mitigate the effects Regards.

itsmoked , please find attached hereinafter the voltage dips measurements associated with dates date: duration(s) voltage magnitude % 16.6.05. 0,1900 55 8.7.05. 0,1700 63 9.7.05. 0,1000 79 21.8.05. 1,7500 73 24.8.05. 0,1500 46...

we have metering instruments on the incoming voltage which is 35 KV and we have the following voltage drops: duration: (s) voltagr Magn. % 0,1900 55 0,1700 63 0,1000 79 1,7500 73 0,1500 46 0,1790 45 0,7500 37 0,0112 155 according to that big MV induction motors...

actually the voltage drop coming from utility and we need to know a way to mitigate its effect to aviode shuting down our kilns

Hi, Our problem in a cement plant is a lot of shut downs due to power fluctuations. We are facing a voltage drop in the main feeder that feed the plant and we would like to know how to mitigate the effect of this problem to aviode kiln shut down. Best regards.

hi, I would like to know how could calculate the voltage drop in a distribution transformer based on the data mentioned on the name plate and the drawn current. Best regards.

hi, I would like to know the physical meaning of transformer short circuit impedance voltage written on the name plate of transformer as % Best regards.

Dear all, We have a distribution transformer with the following data: 6300/400 V , nominal current on LV side 2886 A , short circuit impedance is 6.34%. The actual consumption for this transformer is 1616 A. We want to add a load of 700 A to this transformer to feed T/R set for ESP filter. This...

Dear all, I would like to know whether using soft starter in starting a motor could decrease the cable size rather than the case of starting the motor DOL since the starting current will be limeted and not 7 times the nominal current. Best regards.

Hi, I would like to ask whether enhancing the power factor by using capacitor banks could decrease energy consumption KWH Best regards.

DICKDV the throttle valve is installed in the suction side Regards

Hi; We have a fan drived by a motor 200 KW and has a throttle valve to control the flow. Most of the time the throttle valve opening is 30% . We would like to know how to calculate the power saving in case of replacing the throttle valve by frequency drive. Best regards.

Hi; I have a medium voltage cable 6/10 KV , 3x185 mm sq , CU/XLPE/PVC and I want to test the insulation resistance between phase to phase and phase to sheild , would you please inform the DC voltage level that could be used for such test. Could we use 10000V to test phase to phase and phase to...

Dear; I have read this table but unfortunatly there is not a clarification for the letters numbers used. Regards.

Hi; Could some body providing me with cooling codes (IC) for electrical motors. Regards.