Why tap changer is connected on the hv side

Tappings in a transformer is provided on Hv side due to following 2 reasons. Tap changing is usually done on the HV winding for two reasons.

The HV side have more no of turns as compared to LV so when we calculate the no of turns for tappings the answer obtained is some possible l practical value but this wont be the case on LV side.

Why tap changer is connected on the hv side. The tap changer is connected to HV Side to adjust the coils depending to the primary instantaneous variable voltage for target the secondary voltage be stable and constant. On load tap changer is preferred on High Voltage Side. Mostly the power transformer is used for both step up and step down action.

In that the power transformers turns are in the high voltage side is higher than the low voltage side. Therefor placing on load tap changer circuit on high voltage side which give fine voltage regulation. If we connect Tap changer on the LV side then sparking will take place.

Better controlled output can be determined when we connect tap changer in LV. The HV winding generally wound over LV winding. Why tap changer is placed on high voltage side.

The tap changer is placed on high voltage side because. 1The HV winding generally wound over LV winding hence it is easier to access the HV winding turns instead of LV winding. Tappings in a transformer is provided on Hv side due to following 2 reasons.

Since HV side have low current as compared to LV side. The HV side have more no of turns as compared to LV so when we calculate the no of turns for tappings the answer obtained is some possible l practical value but this wont be the case on LV side. So while tap changing on Load conditions ARC may arise due to Contact changing and its easy to control tap changing in low current side.

So to achieve safe Tap changing operation without any ARCing or other hazards and to achieve proper regulation Tap changers are always connected in HV side than on LV side. On which side the tap changer is usually located and why. Tap changers can be connected at various points in a transformer to either primary or secondary windings.

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. 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. If we see the construction of Transformer we will observe that LV winding are placed just after the core to limit the insulation requirement to be provided and HV winding are placed on the LV winding.

Thus it is quite difficult to provide the Taps on the LV winding of. Why tappings are provided on the high voltage side of the transformer. 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.

So it is easier to provide the tapping on the high voltage side instead of low voltage side. The taps which are using to change turns ratio can be kept on the primary or secondary side. On whatever side they are it is important to maintaining the voltage per turn constant as far as possible.

The tap changers are usually provide on HV Side as the current capacity on HV side is lesser than that of LV side. There is consequently no breaking of current flow. The tap changer is operated by a handle or wheel from the outside of the tank in most transformers.

Off-load The tap changer may be operated when the circuit is energized but not when the circuit is drawing load current. Tap changing is usually done on the HV winding for two reasons. Because the currents are lower the tap changer contacts leads etc can be smaller.

As the HV winding is wound outside the LV winding it is easier to get the tapping connections out to the tap changer. Normallyin many parts of the worldon-load tap changers are provided on HV side of Transformers for getting voltage variation on HV side or on LV side variable flux regulationBut in USA most of the casestapchangers are provided on LV side for LV variation. At lower voltages the tap changer may be located at either the low voltage or high voltage windings.

Tap changers can be connected to the primary or secondary side windings of the transformer depending on. Current rating of the transformer Insulation levels present.