Transformer Correction - Satec expertmeter PM180 Application Note

1. Click Setup on the right of the Transformer Parameters row.
2. Specify the transformer rated power and percent impedance.
3. Click OK to apply your new setup.

2.1.4 Transformer Correction

Generally, the PM180 provides a common transformer correction setup option that is used
for compensation of instrument transformer ratio and phase angle errors in all device
measurements (see MeterSetup/General Setup/Transformer Correction in PAS).
As the transformer angle errors highly affect accuracy of the distance calculations, the fault
locator setup gives you an additional option for precise multi-point transformer error
correction you can use to improve accuracy of the calculated distance.
To setup the transformer correction parameters:
1. In the Current/Voltage transformer correction row, select the number of ranges (test
points) with different correction coefficients.
2. Click Setup on the right of the row to setup correction parameters.
3. For each range, specify the required test point level, transformer ration correction factor
and phase angle error. A test point is given in percent of the rated current/voltage,
below which the correction coefficients are to be applied.
The last non-zero test point's parameters are applied both below and above the specified
level. To use a single point correction over the whole measurement range, specify any
non-zero test point level.
4. Click OK to apply your new setup.
NOTE:
Your settings will not be in effect unless the "Correction Enabled" box on the locator setup
tab is checked.
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