10.12.8 Voltage harmonic monitoring VHMMHAN
GUID-C4E8C37F-0266-44DA-B292-3565C5BD49D0 v1
GUID-804F309E-B02F-4F6B-B0FC-2C7AE3F12DBA v1
Prepare the IED for verification of settings outlined in Section "Preparing the IED
to verify settings".
10.12.8.1 Verifying the signals and settings
GUID-1A5BBF82-94AE-4E87-B951-CA007CC36CF1 v1
The voltage can be injected using common test equipment.
Verifying the warning and alarm time limit of
THD
,
WrnLimitTHD
and
tDelayAlmTHD
GUID-3E56D8AC-9461-4EEA-83A8-522CA177563E v1
1. Supply the IED with voltage at rated value.
2. Apply harmonics at the numerical multiple of fundamental frequency along
with the injected voltage signal.
3. Slowly increase the harmonic amplitudes until the THDWRN signal appears.
4. Compare the harmonic amplitude level value with the set warning limit value.
5. Continue to inject the same level of harmonics level until the THDALM
signal appears and note down the time from THDWRN set to THDALM set.
6. Compare the noted time value with the set time limit value of alarm.
Verifying the warning and alarm time limit of individual harmonic
distortions
IHD
,
WrnLimit#HD
and
tDelayAlm#HD
(where # = 2
nd
,
3
rd
…5
th
)
GUID-17EC5D60-A748-46F4-8F13-A77E9CA3D17D v2
1. Supply the IED with voltage at rated value.
2.
Apply 2
nd
order harmonic along with injected voltage signal.
3. Slowly increase the harmonic amplitude until the 2NDHDWRN signal
appears.
4. Compare the harmonic amplitude level value with the set warning limit value.
5. Continue to inject the same level of harmonics level until the 2NDHDALM
signal appears and note down the time from 2NDHDWRN signal set to
2NDHDALM signal set.
6. Compare the noted time value with the set time limit value of alarm.
7.
Repeat Steps
2 to 6 for the harmonics until 5
th
order.
10.12.8.2 Completing the test
GUID-EDB51B29-9556-4EF4-94E6-5DC6B8C0F13A v1
Continue to test another function or end the test by changing the TestMode setting
to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
Section 10 1MRK 506 377-UEN C
Testing functionality by secondary injection
176 Railway application RER670 2.2 IEC
Commissioning manual
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