Operation mode 3I
0
· cosφ
Procedure
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.
Take setting RCAComp into consideration if not equal to 0.
2. Measure that the operate current of the set directional element is equal to the
INcosPhi> setting.
The I Dir (I
0
cos(Angle)) function activates the START and STDIRIN output.
3.
Measure with angles j = RCADir +/- 45° that the measuring element
operates when I
0
cos (RCADir - j) = I
0
cos(+/-45) = INcosPhi>.
4. Compare the result with the set value.
Take the set characteristic into consideration, see figure
60 and figure 61.
5.
Measure the operate time of the timer by injecting a current two times the set
INcosPhi> value and the polarizing voltage 1.2 · UNRel>.
Tinv = kSN · Sref / 3I · cos (φ)
0test
EQUATION2228 V1 EN (Equation 1)
6. Compare the result with the expected value.
The expected value depends on whether definite or inverse time was selected.
7. Set the polarizing voltage to zero and increase until the boolean output signal
UNREL is activated, which is visible in the Application Configuration in
PCM600 when the IED is in online mode. Compare the voltage with the set
value UNRel>.
8. Continue to test another function or complete the test by setting the test mode
to Off.
Section 13 1MRK 504 088-UEN C
Verifying settings by secondary injection
140
Installation and commissioning manual
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