ABB Relion 670 Series Commissioning Manual page 105

1MRK 505 372-UUS 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 B and phase C.
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 trip 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-ANSI V1 EN-US
Above procedure can also be used to test definite time step. Pay attention that IDMT step can also trip
during such injection. Therefore make sure that appropriate settings are entered in order to insure correct
test results for definite time step.
10.4.11.2 Completing the test
Continue to test another functions or end the test by changing the Test mode setting to Disabled. 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.
10.5 Voltage protection
10.5.1 Two step undervoltage protection UV2PTUV (27)
Prepare the IED for verification of settings as outlined in section
for test" in this chapter.
10.5.1.1 Verifying the settings
Verification of pickup value and time delay to trip for Step 1
1. Check that the IED settings are appropriate, especially the PICKUP value, the definite time delay
and the 1 out of 3 operation mode.
2. Supply the IED with three-phase voltages at their rated values.
3. Slowly decrease the voltage in one of the phases, until the PICKUP signal appears.
4. Note the trip value and compare it with the set value.
Busbar protection REB670
Commissioning manual
f
[ ]
%
injected
.V
f
rated
Note that it is recommended to test IDMT operating times by injected current with the
rated frequency.
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Testing functionality by secondary injection
GUID-5AB7880E-629C-45E5-AF91-3EBDF19DEA79 v2
"Requirements" and section
Section 10
(Equation 14)
SEMOD53540-1 v1
M13796-2 v6
"Preparing
M13796-9 v3
M13796-29 v11
99