Operation mode 3I
0
and φ
SEMOD175060-87 v8
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 lagging 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.
Note that for operation, both the injected current and voltage must be greater than
the set values
INRel>
and
UNRel>
respectively.
The function activates the START and STDIRIN output.
3.
Measure with angles
j
around
/- ROADir.
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.
( )
0
0
/ 3
3
cos
test
test
Tinv
kSN Sref
I
U
j
=
×
×
×
IECEQUATION2403 V1 EN-US
(Equation 3)
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
.
-3U
0
Operate area
3I
0
RCADir
= 0º
ROADir
= 80º
IEC06000652-3-en.vsd
IEC06000652 V3 EN-US
Figure 26:
Example characteristic
Non-directional earth fault current protection
SEMOD175060-117 v10
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.
The expected value depends on whether definite time
tINNonDir
or inverse time was selected.
4.
Continue to test another function or complete the test by setting the test mode to
Off
.
Section 11
1MRK 511 403-UEN Rev. L
Testing functionality by secondary injection
96
Bay control REC670
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Содержание REC670
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