supply below 3.3 KV is considered as LT but in India it is
limited to 415V and from 3.3 to 11KV it is MV but some
people consider 11KV as HT, while from 11KV to 33KV and
above is HT
LT means Low Tenson and voltage will be low and current
will be high.
HT means High Tenson and voltage 11kv to 33kv so Voltage
will be high and current will be low.
Voltages are in three ranges:
1. LV, 2. MV and 3. HV
LV: 0 - 230V
MV: 230 - 650V
LV: >650V
The lines which carry LV and MV are considered as LT lines
and which carry HV are considered as HT lines.
LT means low tension, less than 1000volts and voltage wiil
be loe and current will
high.
HT means high tension,higher than 1000 volts like
11kva,33kva,66kva. and voltage will be high,and current
will be
low
Why 3 over-current and 1 earth fault relay is used on
primary side of transformer? Why 2 over-current and 1 earth
fault relay in used on secondary side of transformer?
What is the
effect of
impedance on the
heat losses in
case of AC
system??? Does
heat losses
really depends
on the impedance
or depends only
on resistive
component
only..??
Ask Questions on ANYTHING, that arise in your Daily Life at 
Site Map
