Operation mode 3I
0
· cosφ
Procedure
1. Set the polarizing voltage to 1.2 · UNRel> and set the phase angle between
voltage and current to the set characteristic angle (RCADir). Note that the the
current lagging the voltage.
Take setting RCAComp into consideration if not equal to 0.
2. Inject current until the function picks up, and make sure that the operate current
of the set directional element is equal to the INcosPhi> setting.
The I Dir (3I
0
· cosφ) function activates the START and STDIRIN output.
3. Assume that φ´ is the phase angle between injected voltage (3U
0
) and current
(3I
0
) i.e. φ´ = RCADir-φ. Change φ´ to for example 45 degrees. Increase the
injected current until the function operates.
4. Compare the result with the set value and make sure that the new injected 3I
0
·
cos φ is equal to the setting INcosPhi>..
Take the set characteristic into consideration, see Figure 34 and Figure 35.
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>.
( )
0 0
cos3 3
test test
kSN Sref
Tinv
I U
j
×
=
× ×
IECEQUATION2402 V2 EN (Equation 77)
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.
1MRK 506 355-UEN A Section 10
Testing functionality by secondary injection
Line distance protection REL670 2.1 IEC 151
Commissioning manual
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