Completing The Test; Multipurpose Protection; Function Revision History; General Current And Voltage Protection Cvgapc - Hitachi Relion 670 Series Commissioning Manual

1MRK 511 403-UEN Rev. L
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

• 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

11.8.1

Function revision history

Document
revision
A
B
C
D
E
F
G
H
J
K
11.8.2

General current and voltage protection CVGAPC

Prepare the IED for verification of settings as outlined in section
section
Bay control REC670
Commissioning manual
Product History
revision
2.2.1 -
2.2.1 -
2.2.2 -
2.2.3 -
2.2.3 -
2.2.4 -
2.2.4 -
2.2.4 -
2.2.4 -
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.
"Preparing for test" in this chapter.
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Testing functionality by secondary injection
GUID-83C3F041-9553-4804-9A39-B3E46A5C9AE6 v2
GUID-74F9B9A9-91EB-45BA-A883-6BA325C8B272 v1
"Requirements" and
Section 11
SEMOD53552-1 v1
SEMOD56488-3 v4
147