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1MRK 506 377-UEN Rev. L
Operation mode 2I
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.
2.
Inject current until the function picks up, and make sure that the operate current is equal to the
INDir> setting for the set directional element.
The function activates the START and STDIRIN output.
Measure with angles j around RCADir +/- ROADir.
3.
4.
Compare the result with the set values, refer to Figure
5.
Measure the operate time of the timer by injecting a current to get two times the set SN_>
operate value.
T
IECEQUATION235 V1 EN-US
6.
Compare the result with the expected value.
The expected value depends on whether definite or inverse time was selected.
7.
Continue to test another function or complete the test by setting the test mode to Off.
IEC15000257 V1 EN-US
Figure 30:
Non-directional earth fault current protection
Procedure
1.
Measure that the operate current is equal to the INNonDir> setting.
The function activates the START and STDIRIN output.
2.
Measure the operate time of the timer by injecting a current of 200% of the operate value.
3.
Compare the result with the expected value.
Railway application RER670
Commissioning manual
and φ
0
Note that for operation, both the injected current and voltage must be greater than
the set values INRel> and UNRel> respectively.
kSN
S
2 /
I
inv
ref
0
Example characteristic
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2
U
cos
test
0
test
RCADir = 0º
ROADir = 80º
Operate area
2I
0
IEC15000257-1-en.vsdx
Testing functionality by secondary injection
GUID-1D01114B-B012-483F-BE1A-2C0237407477 v1
30
for example characteristic.
-2U
0
Section 10
(Equation 5)
SEMOD175060-117 v10
107
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