ABB RED670 Commissioning Manual page 201

1MRK 505 378-UUS Rev. J
where:
t(s)
TD1
V
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.
11.6.3.3 Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.6.4 Overexcitation protection OEXPVPH (24)
Prepare the IED for verification of settings outlined in Section
11.6.4.1 Verifying the settings
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.
11. Check that trip and alarm contacts operate according to the configuration logic.
12. Set the cooling time constant temporarily to min value (1min.) to quickly lower the thermal content.
13. Wait for a period equal to 6 times t_CoolingK switch 20 minutes on a voltage 1.15 · Pickup1 and
check the inverse operate time.
Wait until the thermal memory is emptied, set the cooling time constant according to the setting
plan and check another point on the inverse time curve injecting a voltage 1.3 · Pickup1.
14. Finally check that PICKUP and TRIP information is stored in the event menu.
Line differential protection RED670
Commissioning manual
Trip time in seconds
Settable time multiplier of the function for step 1
Measured voltage
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Testing functionality by secondary injection
"Preparing the IED to verify
Section 11
SEMOD54358-38 v4
M6583-45 v5
settings".
M6583-49 v4
195