Use of one transformer as six types of transformer। 6tricky ways to use a step down transformer

 6tricky ways to use a step down transformer.:

Today's topic is how to use step down transformer in some different tricky ways .

Here I have shown one step-down transformer .let , Primary winding is rated for 240 V and 1 Amp . 

 And Secondary winding is rated for 24 V and 10 Amps .

     

     I will show you one by one all six ways ,but transformer quality had to be good for using the transformer in six different ways. 

(1) step up transformer :

      Here , secondary LV (low voltage) winding of step down transformer is connected to supply voltage and primary HV (high voltage) winding of step down transformer is connected to load .

          If you give 24V to primary of step up transformer (refer above figure) ,you will get 240 V as an output . In this case, we can't give input voltage more than 24V . Otherwise, Winding insulation will burn. 

(2)step up auto transformer:

     This is a 240 V /264 V step up auto transformer.  I have made only one extra connection (dark blue line ). If you give 24 V at input ,we will get 264 V . This output is more beacause primary and secondary windings are added .

 There is no isolation in this transformer in between input and output . Blue Dot indicates polarity. We have to be  careful for polarity during connection.

(3) step down autotransformer :

If we give 240 V input we get 218 as output . There is no any insulation between primary and secondary windings. 

Here , primary voltage is more than secondary voltage because primary and secondary winding turns are added . Also like step up transformer, blue Dot indicates the polarity of induced emf . 

(4) inductive load :

HV primary winding is shorted using wire . A secondary winding is used as a load . This will show R+L load  . Where R is Resistance of Winding wires . Better the quality of the Transformer the value of R will be less.

But if we keep primary open then Impedance will be very large and will behave like a step up transformer.

(5) step down current transformer : 

       Here Step down transformer is used as a current transformer (CT) . By 1st way , step down transformer is first make as step up transformer. 

      Then LV Winding is used as primary and is connected in series main wire. HV winding is used as a secondary. A load of 5  ohm is connected accross secondary winding . 

When 10 Amps current flows through main wire ,then 1 Amp current will flow through secondary winding and there will be 5V drop across 5 ohm resistor. 

(6) isolation transformer: 

     In fig ., isolation transformer 240V /240V is shown . I have used two transformers which are connected back to back . 

If we give 240 V , we will get 240 V as an output . There is double isolation . Percentage impedance of this transformer is double than the normal transformer . Therefore we will get more voltage drop at secondary .

I hope this helps you. Thank you ❤️.