DV Power TRT3 Series, Руководство пользователя

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TRT3x Getting Started
M-T03XNN-205-EN 11
Available options in the AUTOTRANSFORMER menu are listed in the Table 4.
Table 4: Available options in the autotransformer menu
Config PH Displacement Comment
Test mode
Da displayed Delta winding Phase by phase test using
single-phase voltage in turns
or true 3-phase test using 3-
phase voltage, depending on
a particular vector group.
Ya displayed Star winding
YNa displayed Star winding with neutral point
Za displayed Zigzag
ZNa displayed Zigzag with neutral point
AVGD hidden Automatic vector group
detection
TRUE 3~ TEST hidden Only true three-phase test True 3-phase test using 3-
phase voltage
SINGLE hidden Single-phase autotransformer Single-phase test using
single-phase voltage
Table 5: Available autotransformer vector groups
Configuration PH displacement
Ya, YNa 0-4-8
Da, Za, ZNa 0-1-
2,…11
If a ratio deviation calculation is enabled, the following menu is displayed to enter the name plate voltages
and the tap changer positions:
If the name plate voltages are not entered, TRT3x will perform the test and display the results, but it will not
calculate or display the turns ratio deviation. After the name plate voltages and tap changer position(s) are
entered, press
ENTER
to confirm a selection. The next display allows a selection of the test voltage.
TRT3x generates both single-phase and true three-phase test voltages. When generating a single-phase
excitation voltage, TRT3x supplies a single-phase excitation test voltage to each of the three transformer
primary windings in turn. The induced voltages across each of the corresponding unloaded transformer
windings are then measured. The ratio of these voltages is calculated and presented on the display. It is
repeated for all three phases.
Figure 3-1:
Input name plate
voltages values
High Voltage Tap Changer
position
Low Voltage Tap Changer
position
Figure 3-2:
The test voltage
selection