ABB Relion 670 Series Commissioning Manual page 119

1MRK 511 403-UEN Rev. K
8. Check that all above mentioned function binary output signals now have logical value zero.
9. Repeat above steps 1 - 8 for phase L2 and phase L3.
10. Repeat above steps 1 - 8 to test different points from the above table.
Operation of this feature is based on internally calculated peak RMS voltage value. That means that
this feature is also able to operate for current signals with varying frequency. Note that for the
fundamental frequency injection, internally calculated voltage in percent corresponds directly to the
injected current value given in percent. However if it is required to test IDMT characteristic with a
varying frequency, the magnitude of the injected current must be adjusted accordingly. The following
formula can be used to calculate required current RMS value in percent at the desired injection
frequency in order to archive voltage percentage value given in the above table:
[ ]
I %
inj
EQUATION2274 V1 EN-US
Above procedure can also be used to test definite time step. Pay attention that IDMT step can also
operate during such injection. Therefore make sure that appropriate settings are entered in order to
insure correct test results for definite time step.
11.4.16.2 Completing the test
Continue to test another functions 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. Make
sure that all built-in features for this function, which shall be in operation, are enabled and with
correct settings.
11.4.17 Voltage-restrained time overcurrent protection VRPVOC
Prepare the IED for verification of settings as outlined in section
section
11.4.17.1 Function revision history
Document
revision
A
B
C
D
E
F
G
H
J
K
Bay control REC670
Commissioning manual
f
[ ]
%
= injected ×
U
f
rated
Note that it is recommended to test IDMT operating times by injected current with the
rated frequency.
"Preparing for test" in this chapter.
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 Previously called settings Characterist and t_DefOC had their names changed to
Characteristic and t_OC for more clear understanding.
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Testing functionality by secondary injection
GUID-5AB7880E-629C-45E5-AF91-3EBDF19DEA79 v2
GUID-764DA61A-D987-4358-867A-DA43ADDC6E57 v5
"Requirements" and
GUID-9B72080E-B886-4138-B8BC-CCB99C289C87 v1
Section 11
(Equation 14)
113