Step up transformer confusion

[warkan]

Hey guys,

I am pretty new to this field. We have a underground armored cable laid out for around 1.5KM -2KM from the plant(Power room) to a river pond. The job of the river pump is to pump water to our plant. There are two pumps rated around 60HP each. Only, one will be run at any time. The other is just for standby. Recently, we have been having a lot of problems with the cable such as shorting and burns. Temporary fixes are not helping the case. When we checked for voltage being received in the river panel, it was around 390V instead of 420-440V. So, I am wondering if the voltage drop is the reason for the cable problems. If it is, what rated step up transformer do I install in order to regulate the voltage back to normal ? What are the criteria I need to follow ? Any help is much appreciated.

Regards,
Warkan

 

[Knobhead]

Leave him to stew in his own juice.

I don’t believe for on minute he’s employed an electrician.

 

[shanky887614]

surely it would be cheaper to run it off a genny rather than the size of cable he would need lol

i couldnt tell you how many amps for a 60hp motor but say its 60a per phase

(mv/a/m) X load X distance /1000 = vd roflol

 

[Knobhead]

Why use a DG? A diesel pump would cut out the bit in the middle.

 

[Ollie133cup]

LOL! This is why i love working in foreign countries, no idea at all. Almost as bad as trying to force a 4c 120mm from a 110kW Motor into a 63A 415V Plug!! Then telling there "Electrician" that the starting current alone is 400A ... Far East/Middle East your lucky to find a decent sparky at all, which is why the call on the westerners.