Answer / pillay

your transformer had become a step up transformer for some
hours, if you have not connected any load to it than there
is no damage to your load.your transformer itself would not
have undergone any damage and safe to use.Please inform us
what actually happened.

Answer / girish naik

The transformer secondary is designed for 220V..Its having
lesser turns than 415V side..so if we apply 415V it
experiences overfluxing and damages the insulation losses
and also the temparature..

Answer / pillay

this is a case of a stepdown transformer being used as
step up transformer.
as mr milan has said 816.12 would be at the other side.
generally nothing would have happened to the transformer
other than being warm.the transformers insulation class
would be able to take care of the higher voltage.
If the other side the 816.12 volt have been connected to
the
load (suppose to be 200 volts)than damage would have
happened
to the load, the extent depending on what type of
load.

Answer / manjeet kumar

if u connect 415 secondary side for some hour your load not
operate and transformer secondary side is damage.

Answer / sanket patil

First of all primary and secondary of a transformer are
decided after putting it in the service. Hence the windings
of transformer are referred as HV and Lv windings.
Now if the HV winding is connected as a secondary then
the xmer will work satisfactorily
In the another case if 220V wdg is connected to the 415V
supply the answer is same as explained by other friends.

Answer / maan

Most of electrical equipment are rated at 220v,there
working seriously affected if they recive power at haigher
voltage(415v), also losses in primery side increases and
core loss in secondary side , that may damage winding and
insulation.

Answer / siva

transformer will get burst

Answer / a

earth fault will be accrue becz secondary is 200 v means in
secondary side one cable is for phase & another for
neutral.if we connect 415 v in secondary then 2 phases are
connected with neutral.

Answer / prashant

Nothing. it will work satisfacorily

why we commonly use delta star winding in power and distribution transformers

7 Answers  

What are the classification of Servo Motor?

4 Answers   BARC,

What is clean Earth System ?

3 Answers  

1. A bomber drops a bomb from an aircraft flying at 2000 km/hr. at an altitude of 7km. The speed at which the bomb will strike the earth would be

0 Answers   KNJ,

Can we use 1.1x 2 split air-conditioning at a same time in 2kw power loadar

1 Answers  

we know the value of the power factor is 0.8, we know the power factor is not depends upon the load ,then why we cant design the power factor in transformer ?

1 Answers  

WHY 6.6KV MOTORS ARE STAR CONNECTED AND WHY NOT DELTA CONNECTED,

15 Answers   Bhel,

fundamentals of transformers.

5 Answers   Adani,

In a 3 phase 4-wire system. For a 3.5 core cable if all loads are single phase and balanced, what will be neutral current? will it be sum of all phase currents? Or it will be zero? And if loads are unbalanced what will be neutral current?

0 Answers  

in ct secondary one terminal is connected to earth why?

1 Answers  

Define the overload capacity of the motor.

3 Answers   Alstom, Maynilad,

What do you mean by distributed winding in alternators? how exactly is 3 phase power generated?

2 Answers