Answer / zell

high voltage circuits as those with more than 1000 V for
alternating current and at least 1500 V for direct current,
and distinguish it from low voltage (50–1000 V AC or 120–
1500 V DC) and extra low voltage (<50 V AC or <120 V DC)
circuits. This is in the context of building wiring and the
safety of electrical apparatus.

Answer / ramesh

High more than voltage are rated from 1000v both Dc or Ac but
for the safety purposes the rated 110v more than ac are
dangerous
50v more than dc voltage are dangerous for human safety reason

HV=rated from 1kv,11kv ,33kv
LV=rated from 1000v,750v,500v,415v 230v ....

Answer / jahangir alam

low voltage is up to 1000v, high voltage rating start from 36kv to 230kv

why ct ratio always rated 5.

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