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1MRK 511 366-UUS -
11.4.4.1
Commissioning manual
IED test set
NI
V_A
V_B
V_C
V_N
ANSI09000021 V1 EN
Figure 27:
Principle connection of the test set
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
Measuring the trip and time limit for set values
Operation mode 3I
0
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
· cosφ) function activates the PICKUP and PUNDIN output.
0
3.
Assume that φ´ is the phase angle between injected voltage (3V
i.e. φ´ = RCADir-φ. Change φ´ to for example 45 degrees. Increase the injected
current until the function trips.
Testing functionality by secondary injection
NI
V1
V2
V3
V_N
TRIP
ANSI09000021-1-en.vsd
· cosφ
Section 11
IED
) and current (3I
0
)
0
127
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