No.
Test
Test description
11
Ratio IEC61850-9-
2LE
Ratio measure and currents polarity for Not Conventional Transformers. The test is
executed applying current to the primary side and reading the corresponding “Sample
Values”.
The test is executed using the test set remote connection with the PC, using the PDS
program.
Input parameters are the following:
•
Nominal primary current
•
Test current and frequency
•
The sender MAC address
•
The recipient MAC address
•
The svID (sample value ID)
•
The Stream Number
The results are the following:
•
The primary current
•
The measured Sample Values
•
The angle between the primary current and the Sample Values
•
Corrected primary current, polarity, error ratio and error %
Table 44 - Current Transformers tests (4/4)
ATTENTION: for the excitation curve test, the following standards apply:
•
IEC 60044-1; paragraph 14.4.1. The knee point is the voltage at which the increase of 10% of
voltage causes the increase of the 50% of the exciting current
•
ANSI C57.13.1; chapter 9. Plotting a log-log diagram with the excitation current on the X axis
and the exciting voltage on the y axis, the knee point is the one where the tangent of the
curve is at 45°
•
ANSI C57.13.1; chapter 9. Plotting a log-log diagram with the excitation current on the X axis
and the exciting voltage on the y axis, the knee point is the one where the tangent of the
curve is at 30°
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