04
Nov
Why Tap Changer Is Connected On The Hv Side. Transformer Taps are provided on HV side as in this case Tag changing Gera will handle low current and chance of sparking will be less. Why tappings are provided on the high voltage side of the transformer. Mostly the power transformer is used for both step up and step down action. Thus it is quite difficult to provide the Taps on the LV winding of.
The tap changers are usually provide on HV Side as the current capacity on HV side is lesser than that of LV side. On whatever side they are it is important to maintaining the voltage per turn constant as far as possible. Tap changers can be connected at various points in a transformer to either primary or secondary windings. Thus it is quite difficult to provide the Taps on the LV winding of. So it is easier to provide the tapping on the high voltage side instead of low voltage side. Because the currents are lower the tap changer contacts leads etc can be smaller.
On load tap changer is preferred on High Voltage Side.
It becomes easy to access HV windings when a tap is placed on the HV side because HV is wounded with LV and also it reduces lightening risk when breaking down. So it is easier to provide the tapping on the high voltage side instead of low voltage side. 1The HV winding generally wound over LV winding hence it is easier to access the HV winding turns instead of LV winding. There are some reasons for tapping on the high voltage side of the large transformer which are In large transformers the high voltageHV winding is generally wound over the low voltage LVwinding for insulation saving purpose. Tappings in a transformer is provided on Hv side due to following 2 reasons. Off-load The tap changer may be operated when the circuit is energized but not when the circuit is drawing load current.