Overfrequency Protection Saptof; Verifying The Settings - ABB ret650 Commissioning Manual

1MRK 504 126-UEN -
6.6.2
6.6.2.1
Commissioning Manual
Tests/Function test modes/Frequency/SAPTUF(81,f<)/X:SAPTUF 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.

Overfrequency protection SAPTOF

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

Verifying the settings

Verification of START value and time delay to operate
1. Check that the settings in the IED are appropriate, especially the START
value and the definite time delay.
2. Supply the IED with three-phase voltages at their rated values.
3. Slowly increase the frequency of the applied voltage, until the START signal
appears.
4. Note the operate value and compare it with the set value.
5. Decrease the frequency to rated operating conditions.
6. Check that the START signal resets.
7. Instantaneously increase the frequency of the applied voltage to a value about
20% higher than the operate value.
8. Measure the time delay for the TRIP signal, and compare it with the set value.
Extended testing
1. The test above can be repeated to check the time to reset.
Verification of the low voltage magnitude blocking
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.
Section 6
Testing functionality
5.1 "Preparing the IED to
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