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1MRK 511 409-UUS Rev. K
11.4.4
Sensitive directional residual overcurrent and power protection
SDEPSDE (67N)
Prepare the IED for verification of settings as outlined in section
for test"
in this chapter.
IED test set
ANSI09000021 V1 EN-US
Figure 27:
Values of the logical signals belonging to the sensitive directional residual overcurrent and power
protection are available on the local HMI under Main menu /Test /Function status /Current
protection /SensDirResOvCurr(67N,IN>) /SDEPSDE(67N,IN>):x
11.4.4.1
Measuring the trip and time limit for set values
Operation mode 3I
Procedure
1.
Set the polarizing voltage to 1.2 · VNRelPU 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 trip current of the set directional
element is equal to the INcosPhiPU setting.
The I Dir (3I
3.
Assume that φ´ is the phase angle between injected voltage (3V
RCADir-φ. Change φ´ to for example 45 degrees. Increase the injected current until the function
trips.
4.
Compare the result with the set value and make sure that the new injected 3I
the setting INcosPhiPU..
Phasor measurement unit RES670
Commissioning manual
NI
V_A
V_B
V_C
V_N
Principle connection of the test set
· cosφ
0
· cosφ) function activates the PICKUP and PUNDIN output.
0
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"Requirements"
IED
NI
V1
V2
V3
V_N
TRIP
ANSI09000021-1-en.vsd
0
Testing functionality by secondary injection
and section
"Preparing
SEMOD175060-12 v2
SEMOD175060-34 v9
) and current (3I
) i.e. φ´ =
0
· cos φ is equal to
0
Section 11
SEMOD175060-3 v7
111
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