Completing The Test; Rate-Of-Change Frequency Protection Sapfrc (81); Verifying The Settings - ABB RET650 Series Commissioning Manual

1MRK 504 136-UUS B
1. Check that the IED settings are appropriate, for example the pickup value and the time delay.
2. Supply the IED with three-phase voltages at their rated values and frequency 20 mHz over the
set value
ms).
3. Verify that the TRIP signal is active.
4. Decrease the frequency with a 40 mHz step, applying it until the TRIP signal resets.
5. Measure the reset time of the
function.
Verification of the low voltage magnitude blocking
1. Check that the IED settings are appropriate, especially the
SAPTOF, and the
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
100.
Where:
•
•
5. Slowly increase the frequency of the applied voltage, to a value above
explained in Section
6. Check that the PICKUP signal does not appear.
7. Wait for a time corresponding to (
appear.
8. Slowly increase the magnitude of the applied voltages until the
9. Verify that the signal
verify that also the signal TRIP becomes active.
7.6.2.2

Completing the test

Continue to test another function or end the testing by setting the parameter
Disabled under Main menu/Tests/IED test mode/TESTMODE:1. If another function is tested, then
set the parameter
SAPTOF(81,f>)/SAPTOF:X for the function, or for each individual function in a chain, to be tested
next. Remember to set the parameter
tested.
7.6.3

Rate-of-change frequency protection SAPFRC (81)

Prepare the IED for verification of settings as outlined in section
settings".
Values of the logical signals for SAPFRC (81) are available on the local HMI under Main menu/
Tests/Function status/Frequency/SAPFRC(81,df/dt)/SAPFRC:X. The Signal Monitoring in
PCM600 shows the same signals that are available on the local HMI.
7.6.3.1

Verifying the settings

PICKUP value and time delay to operate
Transformer protection RET650
Commissioning manual
StartFrequency , applying it for a time that is at least 10% longer than ( tDelay +100
GlobalBaseSel and the MinValFreqMeas in the SMAI preprocessing function.
MinValFreqMeas is a set value of the SMAI.
UBase is the value in the GBASVAL group identified by the setting
Verification of START value and time delay to
PICKUP appears and wait for a time at least equal to ( tDelay +100 ms) to
Blocked to No under Main menu/Tests/Function test modes/Frequency/
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TRIP signal, and compare it with the technical data of the
tDelay +100 ms), and check that the TRIP signal does not
Blocked to Yes , for each individual function that has been
Testing functionality
PUFrequency and the tDelay in
MinValFreqMeas x UBase /
GlobalBaseSel .
PUFrequency as
operate.
BLKDMAGN signal resets.
TestMode to
"Preparing the IED to verify
Section 7
M16290-34 v4.1.1
M16290-52 v5
M16256-2 v6.1.1
M16256-10 v4
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