Nothing noticeable. DC power is not transmitted between the
coils of a transformer. There would be no current on the
other side of the transformer, unless the power of the
source was constantly modulated. bescause flux does not
change its state.
after some time excessive heat is produced and winding may
T/f must not be connected to dc. bcoz if the PW of a t/fis
connected to dc supply mains, the flux produced will not
vary but remain constant & therefore no emf will be induced
in the SW except at the moment of switching on. thus the
t/f can not be used for raising or lowering the dc voltage
$ also no back induced emf in PW and therfore a heavy
current will be drawn from the supply mains whcih may
result in the burning out of the PW
transformer is not connected to dc.in dc there is no
frequeny.there no changes in frequency and dc is given to
primary there flux is produced but these flux is not
change.so there is no back emf so the secondary current is
equal to primary current so large current is flows through
the windings .so the winding is burn..
if a dc supply is applied across a transformer, there will
b no transfer of power from primary to secondary through d
core bcoz by applying dc there will no change in flux and
hence no emf produced in d primary by self-induction, no
magnetisation of the core and hence no emf in d secondary
by mutual induction.......so overall there will be no
transformation of energy from primary to secondary
At 765Kv, I have seen the use of PT at line side for
metering and CVT for protection, although as far as my
knowledge is concern, PT at this voltage level will have
huge loss and more cost as compared to CVT as CVT can also
perform same function of Protection and Metering? So my
question is why use PT and not CVT for metering and
protection in order to reduce the cost.
If i have two 3000 kW motors and the whole facility requires
a 10 MVA transformer.
What would be better installing two 5 MVA transformers(one
for 1 motor ) or just a single 10 MVA transformer for both
Give reasons for your answer.