1.
Check that you have appropriate settings in the IED, especially the
StartFrequency
,
TtDelay
and the
MinValFreqMeas
in the SMAI
preprocessing function
2.
Supply the IED with three-phase voltages at their 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 set value,
MinValFreqMeas
.
5.
Slowly increase the frequency of the applied voltage, to a value above
StartFrequency
.
6.
Check that the START signal does not appear.
7.
Wait for a time corresponding to
tDelay
, and make sure that the TRIP signal
does not appear.
6.5.2.2
Completing the test
Continue to test another function or end the testing by setting the parameter
TestMode
to
Off
under
Main menu/Tests/IED test mode/1:TESTMODE
. If
another function is tested, then set the parameter
Blocked
to
No
under
Main menu/
Tests/Function test modes/Frequency/SAPTOF(81,f>)/X:SAPTOF
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.
6.5.3
Rate-of-change frequency protection SAPFRC
Prepare the IED for verification of settings as outlined in
Values of the logical signals for SAPFRC are available on the local HMI under
Main menu/Tests/Function status/Frequency/SAPFRC(81,df/dt)/X:SAPFRC
.
The Signal Monitoring in PCM600 shows the same signals that are available on the
local HMI.
6.5.3.1
Verifying the settings
Verification of START value and time delay to operate
1.
Check that the appropriate settings are available in the IED, especially the
START value and the definite time delay. Set
StartFreqGrad
, to a rather
small negative value.
2.
Supply the IED with three-phase voltages at their rated values.
3.
Slowly decrease the frequency of the applied voltage, with an increasing rate-
of-change that finally exceeds the setting of
StartFreqGrad
, and check that
the START signal appears.
4.
Note the operate value and compare it with the set value.
5.
Increase the frequency to rated operating conditions, and zero rate-of-change.
Section 6
1MRK 511 248-UEN -
Testing functionality
66
Commissioning Manual
