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Section 10
Testing functionality by secondary injection
Operation mode 2I
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 current shall lag 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 (2I
3.
Assume that φ is the phase angle between injected voltage (-2U
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 2I
to the setting INcosPhi>.
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>.
T
inv
IECEQUATION234 V1 EN-US
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 and also on the IED HMI under test. 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.
104
· cosφ
0
· cosφ) function activates the START and STDIRIN output.
0
kSN
S
ref
2
I
2
U
cos
0
test
0
test
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1MRK 506 377-UEN Rev. L
GUID-6C7CFB2B-2B83-4E2C-80B9-318432DDAE1C v2
) and current (2I
0
0
· cos φ is equal
0
28
and Figure 29.
Railway application RER670
Commissioning manual
) i.e. φ =
(Equation 3)
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