TRANSFORMER TESTS VOLTECH AT3600 USER MANUAL
PAGE 7.1.52. VPN 98 - 024 TESTS AND TEST CONDITIONS
1.30. WATT - WATTAGE
WHERE USED
The Wattage test is a measure of the input power required to energize a transformer at
no load.
A Wattage test is an excellent check on the magnetic quality of the iron core and the
magnetic joints and would typically be used with iron core transformers with an
operating frequency of around 50Hz.
MEASUREMENT CONDITIONS
During the Wattage test, a constant, user specified ac voltage is applied across the
winding in question. All other windings are held open circuit during this test.
The AT3600 measures the voltage across and current through the winding. The
Wattage is the product of the in phase components of the current and voltage.
If, in the program, the WATT test follows either a VOC or MAGI test which has the
same test conditions (voltage and frequency), and is applied to the same winding,
then the measurement results from the previous tests can be re-used, saving program
execution time.
The test signal can have a frequency in the range 20Hz to 1.5KHz, and an amplitude
from 1V to 270V.
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