OVERVIEW
This
test is made to
determine the
temperature rise of
the transformer
under rated Load.
Thermocouples are
placed to measure
the ambient, core
and coil temperature
at cooling or
shutdown cycle at
first, then at
heating cycle when
transformer is under
test.
Test is done
according to the
IEEE/ANSI standards.
A transformer under
test is selected.
The test method is
selected to be
Shorted or Back to
Back. Test
parameters as well
as involved hardware
settings are
configured.
The hardware
connection to the
TUT is referred to
standards of test
methods. Cold
resistance and
ambient temperatures
are measured during
cooling cycle. Then
AC power supply is
operated and raised
to rated value,
current, voltage,
power, ambient, core
and coil
temperatures are
measured. Test
proceeds until
temperature is
stable as to
referred value. AC
power is off and hot
resistance test is
done during shut
down cycle again. |