0 0
/ 3 3 cos( )
test test
Tinv kSN Sref I U
j
= × × ×
EQUATION2065 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 fi
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.
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
62 for example
characteristic.
5.
Measure the operate time of the timer by injecting a current to get two times
the set SN> operate value.
Tinv = kSN Sref / 3I · 3U cos (φ)
0test
0test
EQUATION2229 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 504 088-UEN C Section 13
Verifying settings by secondary injection
143
Installation and commissioning manual
To Next Page
Loading...
