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1MRK 511 366-UUS -
11.4.7.2
11.5
11.5.1
11.5.1.1
Commissioning manual
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
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.
Voltage protection
Two step undervoltage protection UV2PTUV (27)
Prepare the IED for verification of settings outlined in section
settings".
Verifying the settings
Verification of PICKUP value and time delay to trip for Step 1
1.
Check that the IED settings are appropriate, especially the PICKUP value, the
definite time delay and the 1 out of 3 operation mode.
2.
Supply the IED with three-phase voltages at their rated values.
3.
Slowly decrease the voltage in one of the phases, until the PICKUP signal appears.
4.
Note the trip value and compare it with the set value.
The trip value in secondary volts is calculated according to the
following equations:
For phase-to-ground measurement:
<
Vpickup
VBase
VT
´
´
100
VTprim
3
ANSIEQUATION2430 V1 EN
For phase-to-phase measurement:
Testing functionality by secondary injection
2
to
6
for the second stage.
sec
Section 11
"Preparing the IED to verify
(Equation 89)
137
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