ABB RET670 Installation And Commissioning Manual page 146

Section 13
Verifying settings by secondary injection
140
Operation mode 3I
0
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 cos(Angle)) function activates the START and STDIRIN output.
0
Measure with angles j = RCADir +/- 45° that the measuring element
3.
cos (RCADir - j) = I
operates when I
0
4. Compare the result with the set value.
Take the set characteristic into consideration, see figure
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
0test
EQUATION2228 V1 EN
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.
· cosφ
cos(+/-45) = INcosPhi>.
0
· cos (φ)
1MRK 504 088-UEN C
60 and figure 61.
(Equation 1)
Installation and commissioning manual