M
AVTMTTR100-ENG Rev 6 Nov 2015
64
Full Test CTs
When testing CTs follow the same procedure as indicated for single-phase
transformers. Selecting Full Test, a set up screen will be displayed requesting
information such as device ID, Primary amps and etc. Once the information has
been provided, one can store the configuration for future use. If one selects not
to store the configuration, select Start Test.
A test in progress screen will be displayed, followed by a TEST RESULT 1
screen. This screen contains Test Number, ID number, Primary & Secondary
amps, calculated and measured ratios and % deviation.
TEST RESULT 2 screen is displayed when the right scroll key is selected and
the following results are shown: Test voltage (8 or 1.5 Vrms), Polarity (NORMAL
when primary and secondary CT terminals have the same polarity, or
REVERSED when primary and secondary CT terminals have the opposite
polarity), DC winding resistance of low side, phase displacement and Excitation
current. From this screen the Header information can be entered, test results can
be Printed or Stored, the CT can be RE-TESTED or one can return to the
PREVIOUS or Main Menu.
Full Test Regulator
When testing regulators follow the same procedure as indicated for single-phase
transformers. Selecting Full Test, a TEST SETUP screen will be displayed
requesting device ID and H VOLTAGE value information. Select CONTINUE
once the requested information has been entered. A second TEST SETUP
screen will be displayed requesting X VOLTAGE value and number / quantity of
TAPS associated with the device being tested. Select CONTINUE once the
requested information has been entered. An additional TEST SETUP screen will
be displayed with the provided information. At this point one can modify the
entered information, Save to Custom Configs, Return to the Main Menu or
START TEST.
Selecting Start Test, a test in progress screen is displayed showing the test and
ID numbers, as well as the H & X voltage values that were entered. TEST
RESULT 1 screen will be displayed at the end of test, showing the
CALCULATED & Measured ratios, % DEVIATION, POLARITY and the
previously mentioned information.
TEST RESULT 2 screen contains the VECTOR GROUP, Phase displacement
between windings, EXCITATION current, at no load, and DC winding
resistances, if function is activated. Also, from this screen the HEADER
information can be entered and then printed, test results PRINTED or STORED,
device RE-TESTED, or return to the TEST RESULT 1 screen or MAIN MENU.
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