In High Tension cable there is no Neutral.In market will
get only 1,3 core cbles where as in LT cable there is a
neutral U have to prefer for 3.5 or 4 core cable.HT cable
having Screen to avoid voids and cavities.
basic difference between HT and LT cable is in HT cable
insulation three layer two of semi con compound and one
layer of XLPE compound but in LT cable insulation only in
one layer of XLPE for bear the High voltage .
We use ungrounded DC system (220V/110V) for control and
protection system in substations etc. Suppose we have long
2 core DC cables running from our DCDB in control room to
the load (length of around 2 to 3 km). Do we need to
protect these long DC cables from earth leakages or not? If
i have 28/32 MVA power transformer with 11/6.6 KC voltage
rating and 12%impedance.it have star connection at both
side.but it have another thied winding tertiary
winding.what is used of this winding.
pl tell me
we can stepdown the voltage from 230/12v ,and we use the
voltage for various electronics components why can't we
step up the voltage from 12/230v if we can shall we use the
voltage for domestic single phase supply