Final Adjustment Of Compensation For Vt Ratio Differences; Completing The Test; Loss Of Voltage Check Lovptuv; Measuring The Operate Limit Of Set Values - ABB rec670 Commissioning Manual
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Also See for rec670:
- Applications manual (658 pages) ,
- Product manual (139 pages) ,
- Operator's manual (116 pages)
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1MRK 511 360-UEN A
10.5.4.4
10.5.4.5
10.5.5
10.5.5.1
Bay control REC670 2.1 IEC
Commissioning manual
Testing functionality by secondary injection
1.
Connect voltages to the IED according to valid connection diagram and figure
20.
2.
Set Ur (rated voltage) to the U1 inputs and increase U2 voltage until differential
voltage is 1.5 · operating level (UDTrip).
3.
Switch on the test set. Measure the time from activation of the START signal
until TRIP signal is activated.
4.
Check the measured time by comparing it to the set trip time tTrip.
5.
Increase the voltage until START signal resets. Measure the time from reset of
START signal to reset of TRIP signal.
6.
Check the measured time by comparing it to the set trip reset time tReset.
Final adjustment of compensation for VT ratio differences
Procedure
1.
With the protection in test mode, view the differential voltage service values in
each phase on the local HMI under Main menu/Test/Function status/Voltage
protection/VoltageDiff(PTOV,60)/VDCPTOV:x.
The IED voltage inputs should be connected to the VTs
according to valid connection diagram.
2.
Record the differential voltages.
3.
Calculate the compensation factor RFLx for each phase.
For information about calculation of the compensation factor, see the
application manual.
4.
Set the compensation factors on the local HMI under Main menu/Settings/
Settings group N/Voltage protection/VoltageDiff(PTOV,60)/VDCPTOV:x
5.
Check that the differential voltages are close to zero.
Completing the test
Continue to test another function or end the test by changing the TestMode setting to
Off. Restore connections and settings to their original values, if they were changed for
testing purposes.
Loss of voltage check LOVPTUV
Prepare the IED for verification of settings outlined in section
verify
settings".
Measuring the operate limit of set values
Section 10
"Preparing the IED to
125
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