1.
Check that the IED settings are appropriate, for example the start value and the time
delay.
2.
Supply the IED with three-phase voltages at their rated values and frequency 20 mHz
under the set value
StartFrequency, applying it for a time that is at least 10% longer than
(
100 ms).
3.
Verify that the TRIP signal is active.
4.
Increase the frequency with a 40 mHz step, applying it until the TRIP signal resets.
5.
Measure the reset time of the
TRIP signal, and compare it with the technical data of the
function.
Verification of the low voltage magnitude blocking
M16289-39 v5.1.1
1.
Check that the IED settings are appropriate, especially the
StartFrequency and the tDelay
in SAPTUF, and the
GlobalBaseSel and the MinValFreqMeas in the SMAI preprocessing
function.
2.
Supply the IED with three-phase voltages at rated values.
3.
Slowly decrease the magnitude of the applied voltage until the BLKDMAGN signal
appears.
4.
Note the voltage magnitude value and compare it with the value
MinValFreqMeas x
UBase / 100.
Where:
•
MinValFreqMeas is a set value of the SMAI.
•
UBase is the value in the GBASVAL group identified by the setting
GlobalBaseSel.
5.
Slowly decrease the frequency of the applied voltage, to a value below
StartFrequency as
explained in Section
"Verification of START value and time delay to operate"
.
6.
Check that the START signal does not appear.
7.
Wait for a time corresponding to (
100 ms), and check that the TRIP signal does
not appear.
8.
Slowly increase the magnitude of the applied voltages until the
BLKDMAGN signal resets.
9.
Verify that the signal
START appears and wait for a time at least equal to (100 ms)
to verify that also the signal TRIP becomes active.
7.5.1.2
Completing the test
M16289-57 v5
Continue to test another function or end the testing by setting the parameter
TestMode to Off
under Main menu/Tests/IED test mode/TESTMODE:1. If another function is tested, then set
the parameter
Blocked to No under Main menu/Tests/Function test modes/Frequency/
SAPTUF(81,f<)/SAPTUF:X for the function, or for each individual function in a chain, to be
tested next. Remember to set the parameter
Blocked to Yes, for each individual function that
has been tested.
7.5.2
Overfrequency protection SAPTOF
M16290-2 v7.1.1
Prepare the IED for verification of settings as outlined in section
.
Values of the logical signals for SAPTOF are available on the local HMI under Main menu/
Tests/Function status/Frequency/SAPTOF(81,f>)/SAPTOF:X. The Signal Monitoring in
PCM600 shows the same signals that are available on the local HMI.
1MRK 505 293-UEN B
Section 7
Testing functionality
Breaker protection REQ650
71
Commissioning manual
© Copyright 2013 ABB. All rights reserved
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