1.
Connect the test set for injection of three-phase currents and three-phase voltages to the
appropriate current and voltage terminals of the IED.
2.
Inject current(s) and voltage(s) in a way that relevant measured (according to setting parameter
CurrentInput
and
VoltageInput
) currents and voltages are created from the test set.
Overall check in principal as above (non-directional overcurrent feature)
3.
Operate value measurement
The relevant voltage restraining value (according to setting parameter
VoltageInput
) has also to
be injected from the test set and the influence on the operate value has to be calculated when
testing of the operate value is done.
4.
Operate time measurement
Definite times may be tested as above (non-directional overcurrent feature). For inverse time
characteristics the START value (to which the overcurrent ratio has to be calculated) is the
actual pickup value as got with actual restraining from the voltage restraining quantity.
11.8.2.4
Overcurrent feature with directionality
SEMOD56488-60 v5
Please note that the directional characteristic can be set in two different ways either just dependent
on the angle between current and polarizing voltage (setting parameter
DirPrinc_OC1
or
DirPrinc_OC2
set to or in a way that the operate value also is dependent on the angle between
current and polarizing voltage according to the I · cos(
F
) law (setting parameter
DirPrinc_OC1
or
DirPrinc_OC2
set to I · cos(
F
). This has to be known if a more detailed measurement of the
directional characteristic is made, than the one described below.
Procedure
1.
Connect the test set for injection of three-phase currents and three-phase voltages to the
appropriate current and voltage terminals of the IED.
2.
Inject current(s) and voltage(s) in a way that relevant measured (according to setting parameter
CurrentInput
and
VoltageInput
) currents and voltages are created from the test set.
3.
Set the relevant measuring quantity current to lag or lead (lag for negative RCA angle and lead
for positive RCA angle) the relevant polarizing quantity voltage by an angle equal to the set IED
characteristic angle (rca-dir) when forward directional feature is selected and the
CTstarpoint
configuration parameter is set to
ToObject
.
If reverse directional feature is selected or
CTstarpoint
configuration parameter is set to
FromObject
, the angle between current and polarizing voltage shall be set equal to rca-dir
+180°.
4.
Overall check in principal as above (non-directional overcurrent feature)
5.
Reverse the direction of the injection current and check that the protection does not operate.
6.
Check with low polarization voltage that the feature becomes non-directional, blocked or with
memory according to the setting.
11.8.2.5
Over/Undervoltage feature
SEMOD56488-83 v2
Procedure
1.
Connect the test set for injection three-phase voltages to the appropriate voltage terminals of
the IED.
2.
Inject voltage(s) in a way that relevant measured (according to setting parameter
VoltageInput
)
voltages are created from the test set.
3.
Overall check in principal as above (non-directional overcurrent feature) and correspondingly
for the undervoltage feature.
11.8.2.6
Completing the test
SEMOD56488-99 v2
Continue to test another function or end the test by changing the
TESTMODE
setting to
Off
. Restore
connections and settings to the original values, if changed for testing purposes.
1MRK 511 403-UEN Rev. L
Section 11
Testing functionality by secondary injection
Bay control REC670
149
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Summary of Contents for REC670
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