Verification of voltage band limit check logic
1.
Ensure that the settings in the IED are appropriate to the default settings, especially the
CurrStartLevel
,
FreqHighLimit
,
FreqLowLimit
,
UHighLimit
and
ULowLimit
settings.
2.
Ensure that the
EnaVoltCheck
is enabled.
3.
Supply the IED with three-phase currents and voltages at their rated values.
4.
Check that the
VOLTOK
signal appears.
5.
Slowly decrease the frequency of the applied voltage until the
START
signal appears.
6.
Slowly decrease the positive-sequence voltage of the injected voltage below the
ULowLimit
value until the
START
signal disappears.
7.
Check that the
VOLTOK
signal disappears.
8.
Compare the reset value to the set voltage low limit value.
9.
Readjust the positive-sequence voltage of the applied voltage to a value within the set voltage
band limits.
10. Check that the
START
signal reappears.
11. Slowly increase the positive-sequence voltage of the injected voltage above the
UHighLimit
value until the
START
signal disappears.
12. Compare the reset value to the set voltage high limit value.
11.7.4.2
Completing the test
GUID-83C3F041-9553-4804-9A39-B3E46A5C9AE6 v2
•
Continue to test another function or end the test by changing the
Test mode
setting to
off
.
•
Restore connections and settings to their original values if they were changed for testing
purposes.
11.8
Multipurpose protection
SEMOD53552-1 v1
11.8.1
Function revision history
GUID-74F9B9A9-91EB-45BA-A883-6BA325C8B272 v1
Document
revision
Product
revision
History
A
2.2.1
-
B
2.2.1
-
C
2.2.2
-
D
2.2.3
-
E
2.2.3
-
F
2.2.4
-
G
2.2.4
-
H
2.2.4
-
J
2.2.4
-
K
2.2.5
•
The harmonic restraint function changed to freeze the definite and IDMT timers.
•
The maximum value of the settings
IMin1
and
IMin2
has been decreased to 1000.0
% of IBase.
•
Setting
BlkLevel2nd
was removed from the function.
•
Previously called stepwise settings
t_DefOCx
and
tResetDef_OCx
had their names
changed to
t_OCx
and
tReset_OCx
for more clear understanding.
11.8.2
General current and voltage protection CVGAPC
SEMOD56488-3 v4
Prepare the IED for verification of settings as outlined in section
1MRK 511 403-UEN Rev. L
Section 11
Testing functionality by secondary injection
Bay control REC670
147
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Содержание REC670
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