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Section 10
Testing functionality by secondary injection
10.5.12.2
10.5.13
10.5.13.1
166
1.
Connect the test set for injection of voltage and current corresponding to the
mode to be used in the application. If a three phase test set is available this could
be used for all the modes. If a single phase current/voltage test set is available the
test set should be connected to a selected input for one phase current and voltage.
2.
Adjust the injected current and voltage to the set rated values in % of IBase and
UBase (converted to secondary current and voltage). The angle between the
injected current and voltage shall be set equal to the set direction Angle1, angle
for stage 1 (equal to 0° for low forward power protection and equal to 180° for
reverse power protection). Check that the monitored active power is equal to
100% of rated power and that the reactive power is equal to 0% of rated power.
3.
Change the angle between the injected current and voltage to Angle1 + 90°.
Check that the monitored active power is equal to 0% of rated power and that the
reactive power is equal to 100% of rated power.
4.
Change the angle between the injected current and voltage back to Angle1 value.
Increase the current slowly from 0 until the START1 signal, start of stage 1, is
activated. Check the injected power and compare it to the set value Power1,
power setting for stage 1 in % of Sbase.
5.
Increase the current to 100% of IBase and switch the current off.
6.
Switch the current on and measure the time for activation of TRIP1, trip of stage
1.
7.
If a second stage is used, repeat steps
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.
Broken conductor check BRCPTOC
Prepare the IED for verification of settings outlined in section
verify
settings".
Measuring the operate and time limit of set values
1.
Check that the input logical signal BLOCK to the BRCPTOC function block is
logical zero and note on the local HMI that the output signal TRIP from the
BRCPTOC function block is equal to the logical 0.
2.
Set the measured current (fault current) in one phase to about 110% of the set
operating current IP>.
Observe to not exceed the maximum permitted overloading of the current
circuits in the terminal.
3.
Switch on the fault current and measure the operating time of BRCPTOC.
TRIP is controlled by Gate 13 in the configuration.
Use the TRIP signal from the configured binary output to stop the timer.
1MRK 506 355-UEN A
2
to
6
for the second stage.
"Preparing the IED to
Line distance protection REL670 2.1 IEC
Commissioning manual
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