Transformer Tapping Methods
Transformer Tapping Methods
(OP)
I would like to know difference,advantages and disadvantages of having transformer tap changer based on variable flux and constant flux method?
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Transformer Tapping Methods
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RE: Transformer Tapping Methods
On variable flux tap changer method the tap changer is located on low voltage side-connected to low voltage winding.As primary voltage increase the voltage per turn will increase also.Then, in order to maintain the low voltage constant one has to decrease the number of low voltage turns per windings.
The advantages of this method are:
The level of insulation for tapped winding and for tap changer is low.
A Wye connected three-phase tap changer can be used.
The current in common winding is lower than current in LV line terminal ,so a smaller tap changer can be selected.
The disadvantage is that as the losses, exciting current,impedance and the sound level vary with the tap position a bigger core must be selected and the transformer is bigger and heavier.
For more informations see:
http://boo
page 492 Load Tap Changers
RE: Transformer Tapping Methods