6.3.7 Sensitive directional residual overcurrent and power protection
SDEPSDE (67N)
Prepare the IED for verification of settings as outlined in 5.1 "Preparing the IED to verify
settings".
Values of the logical signals for SDEPSDE (67N) are available on the local HMI under
Main menu/Tests/Function status/Current/SDEPSDE(67N,IN<->)/SDEPSDE:1.
The Signal Monitoring in PCM600 shows the same signals that are available on the local
HMI.
6.3.7.1 Measuring the operate and time limit for set values
Operation mode 3I
0
· cosφ
Procedure
1. Set the polarizing voltage to 1.2 · VNRelPU 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
INcosPhiPU setting.
The I Dir (I
0
cos(Angle)) function activates the BFI_3P 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) = INcosPhiPU.
4. Compare the result with the set value.
Take the set characteristic into consideration, see figure 10 and figure 11.
5. Measure the operate time of the timer by injecting a current two times the set
INcosPhiPU value and the polarizing voltage 1.2 · VNRelPU.
( )
0/ 3 costestTinv kSN Sref I
j
= × ×
IECEQUATION2402 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
VNREL 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 VNRelPU.
8. Continue to test another function or complete the test by setting the test mode to
Disabled.
1MRK 505 293-UUS A Section 6
Testing functionality
53
Commissioning manual
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