Vpickup> Set pickup voltage for step 1
For example, if the measured voltage jumps from 0 to 1.2 times the set pickup
voltage level and time multiplier TD1 is set to 0.05 s (default value), then the
TRST1 and TRIP signals trip at a time equal to 0.250 s ± tolerance.
8. Repeat the test for Step 2 of the function.
13.6.3.2 Completing the test
SEMOD54358-38 v4
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.
13.6.4 Overexcitation protection OEXPVPH (24)
M6583-45 v5
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to
verify settings".
13.6.4.1 Verifying the settings
M6583-49 v4
1. Enable function.
2. Connect a symmetrical three-phase voltage input from the test set to the
appropriate connection terminals of the overexcitation protection OEXPVPH (24)
is configured for a three-phase voltage input.
A single-phase injection voltage is applied if the function is configured for a
phase-to-phase voltage input.
OEXPVPH (24) is conveniently tested using rated frequency for the injection
voltage and increasing the injection voltage to get the desired overexcitation
level.
3. Connect the alarm contact to the timer and set the time delay tAlarm temporarily
to zero.
4. Increase the voltage and note the operate value Pickup1.
5. Reduce the voltage slowly and note the reset value.
6. Set the alarm time delay to the correct value according to the setting plan and
check the time delay, injecting a voltage corresponding to 1.2 · Pickup1.
7. Connect a trip output contact to the timer and temporarily set the time delay
t_MinTripDelay to 0.5s.
8. Increase the voltage and note the Pickup2 operate value
9. Reduce the voltage slowly and note the reset value.
10. Set the time delay to the correct value according to the setting plan and check the
time delay t_MinTripDelay, injecting a voltage corresponding to 1.2 · Pickup2.
1MRK 502 073-UUS A Section 13
Testing functionality by secondary injection
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 223
Commissioning manual
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