3
Arrester characteristics tester
System Settings
Data Measurement
Data View
Instrument Calibration
Time Calibration
↑↓
Move
Y
Enter
N
Esc
Figure 4 Main Menu
2. Click System Settings to display the menu as shown in Figure 5:
Arrester characteristics tester
Compensation Angle +0.000
Transformation Ratio 01000
Device No
0000-A
↑↓
Move
Y
Enter
N
Esc
Figure 5 System Settings Menu
In this menu, you can set the transformation ratio and the compensation angle.
The entry of digits is - 1 2 3 4 5 6 7 8 9 0. Cycle.
The transformation ratio cannot be
negative, the first digit of the compensation angle is only -, and other entry is wrong. One
decimal point is only used between the data.
↑: cycle the digit. ↓: move to the right. After the digits are entered, press Return to save.
* Note the correct algorithm of the transformation ratio:
Determination method for transformation ratio of testing transformer: the transformation
ratio herein should be turns ratio or voltage ratio of high voltage winding and measuring
instrument winding. For example, for the testing transformer with AC output rated voltage of
50KV, the rated voltage of the measuring instrument winding is usually 100V, so the
transformation ratio is 50KV/100V=500. Determination method for online transformation ratio:
for example, the transformation ratio of 110KV arrester is (110KV/
)/(100KV/
)=1100.
*Algorithm of input compensation angle:
When the compensation angle is 0, firstly measure the angle φ{φA and φC} for phase A and
phase C, and use {φC-φA}/2=compensation angle, wherein φA is positive, and φC is negative.
3. Click the menu “Data Measurement” to display the menu as shown in Figure 6:
Figure 6 Data Test Main Menu
Compensation angle: for the stored data, the compensation angle can be modified, but the
modified value only influences the currently displayed/printed data and cannot be saved.
Transformation ratio: PT or transformation ratio of testing transformation, the displayed test
0000-A
Arrester Test Interface
Full V
0.000KV
Full I
0.000mA
Fund V
0.000KV
Res I
0.000mA
Cap I
0.000mA Res Fund I
0.000mA
Freq
50.00Hz
Res I3
0.000mA
A Power
0.000W
Res I5
0.000mA
R Power
0.000W
Res I7
0.000mA
Ratio
0.000
Res IMax
0.000mA
Angle
0.000
Diff Phase
0.00
Wave
Save
Esc
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