Vanguard Tri-Phase - Manual (Page 37)

TRI-PHASE OPERATING™ INSTRUCTIONS
37
13.7 Test Results Status Display
RATIO mA %DIFF
+10.005 1.9
0.05
Figure 24.0 Test Results Status Display
a. Description: Displays the transformer winding polarity, turns-ratio, excitation current (in
milliamps), and turns-ratio percentage error after completion of the transformer test. A
typical turns-ratio test result screen is shown in Figure 24.0. The display result is explained
below:
Ratio displayed: 10.005
Polarity displayed: “+” (in phase)
Excitation current: 1.9mA
Percentage error: 0.05%
b. Origin: The LCD displays “Test Results Status Display” (Figure 24.0) after the “Test In
Progress Status Display” (Figure 23.0).
c. Action Options: Press any key or push down the Control Knob to go to the “Print Test
Results Menu” (Figure 25.0).
d. Action To Perform: Observe the test result status, then press any key or push down the
Control Knob.
NOTE:
“% DIFF” is calculated as the Absolute Value of [(Cal ratio –Measured ratio)/Cal ratio] x 100.
“% DIFF” will only be displayed if nameplate voltages were entered.