( )
0 0/ 3 3 costest testTinv kSN Sref I U
j
= × × ×
IECEQUATION2403 V1 EN (Equation 2)
6. Compare the result with the expected value.
The expected value depends on whether definite or inverse time was selected.
7. Continue to test another function or complete the test by setting the test mode
to Off.
Operation mode 3I
0
and φ
1. Set the polarizing voltage to 1.2 · UNRel> and the phase angle between
voltage and current to the set characteristic angle (RCADir), the current
lagging the voltage.
2. Measure that the operate power is equal to the INDir> setting for the set
directional element.
Note that for operation, both the injected current and voltage
must be greater than the set values INRel> and UNRel>
respectively.
The function activates the START and STDIRIN output.
3.
Measure with angles j around RCADir +/- ROADir.
4. Compare the result with the set values, refer to figure
96 for example
characteristic.
5. Measure the operate time of the timer by injecting a current to get two times
the set SN_> operate value.
( )
0 0/ 3 3 costest testTinv kSN Sref I U
j
= × × ×
IECEQUATION2403 V1 EN (Equation 3)
6. Compare the result with the expected value.
The expected value depends on whether definite or inverse time was selected.
7. Continue to test another function or complete the test by setting the test mode
to Off.
1MRK 502 029-UEN A Section 15
Verifying settings by secondary injection
177
Installation and commissioning manual
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