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 are using a 63A MCCB(SIEMENS MAKE) for one of the feeder
in LV substation panel.It is supplying to a lighting & power
socket DB.Settings in the MCCB is Ir = 63 * 1 , Isd = 8
times of Ir , tsd = 0.5 sec( I2 t off).
Sometimes this MCCB is tripping .But no trip in DB MCB.
Can anybody tell me reason ?
From where i can know about the MCCB settings?