We have a 33/11kv switchyard having 12.5 MVA power
transformer. We export & import power through this
transformer. When we export power, the PF will be depend on
GRID PF & when we import power the PF will be depend on our
load PF. but the problem is that,when neither we export nor
import but our 33KV vCB is in close position,our meter read
the power factor 0.14 to 0.25 at that moment. So how can be
we improve the power factor at that moment.
How many types of Differential protection are there?
and what the special arrangement are made at the time of
charging of a transformer on the Differential protection?
what are the pecularity of shaver sockets ?
I have a small system with two motors that are running on
380 vac, 60 hz. These motors are expensive and I usally get
them from Brazil. I am adding another motor to the system,
but I want to purchase a 480 vac, 60 hz motor to use. It
will be on a VFD that is rated fro 380 thru 480. Is this
posible and will I have to use a larger motor and derate it?