SuperlecDirect - ElectriciansForums.net Electrical Suppliers
This official sponsor may provide discounts for members

Discuss 11kv transformer tapping in the Commercial Electrical Advice area at ElectriciansForums.net

B

bolthead

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:  American Electrical Advice Forum

hello, at our plant we have an 11kv transformer which supplys 250v single phase 433v three phase.we recently had some problems with a german machine which had some sensitive electronics that kept blowing.after a word with the transformer inspector he informed us there is another tapping that would bring down the voltage by 2.5% bringing it to about 244v per phase(nearer the eu voltages) and also reducing current which is about 600a per phase at the moment thus reducing power consumption.is there any pitfalls that anyone is aware of doing this.has anyone else done it?
cheers
 
CK Tools :) The professionals choice when it comes to Electrical Tools
This official sponsor may provide discounts for members

ian.settle1

-
Mentor
Arms
hello, at our plant we have an 11kv transformer which supplys 250v single phase 433v three phase.we recently had some problems with a german machine which had some sensitive electronics that kept blowing.after a word with the transformer inspector he informed us there is another tapping that would bring down the voltage by 2.5% bringing it to about 244v per phase(nearer the eu voltages) and also reducing current which is about 600a per phase at the moment thus reducing power consumption.is there any pitfalls that anyone is aware of doing this.has anyone else done it?
cheers

Unless you have been HV trained you would need to get someone in to do it as some transfomers you can switch it with the power on ans some you need to isolate the transformer before you switch it.
 
B

bolthead

  • Thread Starter Thread Starter
  • #3
yes it needs power shutting off first then switching over but are there any draw backs to doing this.if not why hasnt it been done before now and is everybody "at it"?
 
Test Meter - Forum Sponsors since 2007!
This official sponsor may provide discounts for members

Reply to 11kv transformer tapping in the Commercial Electrical Advice area at ElectriciansForums.net

Top Bottom