current and voltage and the phase angle between the voltage and current can be controlled.
During the test the analog outputs of active and reactive power shall be monitored.
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
VBase (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 PICKUP1 signal, pickup 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 2 to 6 for the second stage.
11.5.11.2 Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to
Disabled. Restore connections and settings to their original values, if they were changed
for testing purposes.
11.5.12 Broken conductor check BRCPTOC (46)
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to
verify settings".
11.5.12.1 Measuring the trip and time limit of set values
1. Check that the input logical signal BLOCK to the BRCPTOC (46) function block is
logical zero and note on the local HMI that the output signal TRIP from the
BRCPTOC (46) 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 Pickup_PH.
Section 11 1MRK 504 165-UUS -
Testing functionality by secondary injection
200 Transformer protection RET670 2.2 ANSI
Commissioning manual
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