running a 380 volt conveyor motor

[sureshnair1967]

Dear all,

IN ONE OF MY PROJECT WE HAVE A CONVEYOR MOTOR WITH 350KW , 380VOLT,50 HZ, THE POWER SOURCE IS GENSET WHICH IS LOCATED ALMOST 650 METERS AWAY FROM THE DRIVE.DUE TO THIS DISTACE INVOLVED THE CABLES FOR THE 380 VOLTAGE APPLICATION WAS CALCULATD AND SELECTED WITH 4 RUNS OF 3 C X 300 SQMM...WHICH  IS VERY COSTLY AND WE OPTED FOR OTHER SOLUTIONS LIKE HT OPTIONS.

THE DESIGN IS LIKE THIS : - GENSET - MCC PANEL - STEPUPTRANSFORMER-STEPDOWN TRANSFORMER-LOCAL STARTER PANEL - 350 KW MOTOR

USING A STEP UP 500KVA TRANFORMER TO STEP UP THE VOLTAGE (380 TO 6KV )FROM THE MCC PANEL AND THEN THE SUPPLY IS FED TO THE OTHER TRANSFORMER (VIA 3 X 25 SQMM 6 KV CABLE ) LOCATED NEAR THE DRIVE END WHICH WILL STEP DOWN THE VOLTAGE (FROM 6KV BACK TO 380VOLTS) , THEN FED TO THE LOCAL STARTER PANEL WHICH IS CONNECTED TO THE MOTOR.

NEED TO KNOW WHEATHER ANY EXISITNG SYSTEM IS PRACTICALLY RUNNING ANYWHERE.

OR DO ANYBODY CAN SUGGEST ANY OTHER SOLUTION FOR THIS SORT OF MOTOR APPLICATION.

[wdyasq]

Sure hope you find that caps-lock and quit yelling at us. It is hard to read and inconsiderate too.

Ron

[jimjjnn]

He sure do shout, Don't he?

[Nando]

First learn NOT to shout !!

Writing all the message with capital letters is a bad Internet Etiquette

So, please come back with lower case writing, most people here will not respond to your message.

NO, your idea is not good, the transformer has to have the capacity to start the motor, so better determine how much power the motor needs to start from Zero to 90 % of running RPM .

Since I do not know what you have, it seems that you may need a 1000 KW transformers, and to reduce the losses convert to around 3200 Volts -- again, I do not know where you are and what type of power transformation sequence your national GRID has, to be able to use a common available transformer.

And the transformer may need voltage adjustment.

Nando

[commanda]

Please explain the relevance to RENEWABLE ENERGY.

If you're really running a 350 KiloWatt motor on a conveyor belt, this is obviously a commercial application and you can therefore afford to pay for professional advice.

My rates start at at AU$1000 per hour and are negotiable upwards from there. Contact me directly if I can be of further assistance.

Amanda

[Stynus]

The transformers cost more than the copper you save.

[Goose]

sureshnair1967,

try asking your question on this website.  Should get better response.

http://www.eng-tips.com/threadcategory.cfm?lev2=11