Hitachi Relion 670 Series Commissioning Manual page 190

Section 11
Testing functionality by secondary injection
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.
11.6.4.2 Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.6.5 Voltage differential protection VDCPTDV (87V)
Prepare the IED for verification of settings as outlined in section
for test" in this chapter.
11.6.5.1 Function revision history
Document
revision
A
B
C
D
E
F
H
J
L
M
184
Product History
revision
2.2.1 -
2.2.1 -
2.2.2 -
2.2.3 -
2.2.3 -
2.2.4 -
2.2.4 -
2.2.5 -
2.2.6 -
2.2.6 Function name changed from VDCPTOV to VDCPTDV
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1MRK506371-UUS Rev. M
"Requirements" and section
GUID-04679E4E-E0D2-4BA6-A002-4020E52DB973 v2
Line distance protection REL670
Commissioning manual
M6583-85 v4
SEMOD175258-3 v3
"Preparing