IEC09000021-2-en.vsd
IED test set
NI
IED
NI
L1U
L2U
L3U
NU
U1
U2
U3
NU
TRIP
IEC09000021 V2 EN
Figure 43:
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
12.5.6.1
Measuring the operate and time limit for set values
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
Section 12
1MRK502053-UEN B
Testing functionality by secondary injection
154
Generator protection REG670 2.0 IEC
Commissioning manual
Содержание REG670 2.0 IEC
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