Describe how you dry the windings of a large transformer...

Transcript

00:01 Hello students in this question we are asked to list out the different types of transformer cooling and explain why they need to be cooled the different types is air cooling then oil cooling then water cooling forced oil or water cooling oil cooling.

00:25 These are the different types of transformer cooling so air cooling in this method we blow air into the circulation chamber and it will commonly cool for small and medium sized transformers oil cooling is given for to provide both insulation and cooling right oil is there for insulation and cooling so oil circulates within the transformer absorbing the heat and transferring to the cooling surfaces water cooling is when large power transformers will use this kind of water cooling so using pipes it cools down with cooling ducts to remove the heat forced oil or cooling water cooling is a combined method of oil and water cooling so the transformer is immersed in oil and water is circulated through pipes so the transformer will have to go through both these cooling methods okay at the same time so this is the setup now second question the need for cooling so transformer need to be cooled because the heat dissipation using air is not that steadily distributed so the heat generation is there so transformers generate heat due to losses right energy losses will in winding so transformer is a structure of windings between two separation so this will have metal cladding metal surfaces over here so this metal surfaces will absorb some of the induction and it will provide produce some current so this will cause eddy currents to form and heat will be generated in this thing and this has to be substantially decreased to maintain the performance and efficiency of the transformer.

02:20 That's why we cool okay, so it will provide temperature control then we have longer lifetime overload capacity and then efficiency so this will all happen because of the setup the three third question the preferred load voltage winding connection for a three -phase transformer.

02:58 So when serving a large number of single -phase loads from a three -phase the preferred low voltage winding connection is called the delta connection so there are some advantages to delta connection over other connections it allows balanced loads it allowed balanced loads to be distributed evenly across the three phases and balanced lows that is one advantage second one is lower current third one is flexibility so in delta connection the line current is 1 by root 3 root 3 times the phase current so that is lower current value the delta connection provides flexibility for supplying both single phase and three phase...

Question

Describe how you dry the windings of a large transformer, include estimates of voltage, current settings and time needed.

Question

Describe how you dry the windings of a large transformer, include estimates of voltage, current settings and time needed.

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