10.12.9.1
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
, 4
th
…9
th
)
GUID-17EC5D60-A748-46F4-8F13-A77E9CA3D17D v3
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
for the harmonics until 9
th
order.
10.12.9.2
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.
10.12.10 Function revision history
GUID-E828F930-88FF-4D5B-8304-2BD3B89919B8 v1
10.12.11 Voltage harmonic monitoring VHMMHAI
GUID-B2F24353-AAEA-4520-BB1C-5FD5FFCFC67B v1
GUID-804F309E-B02F-4F6B-B0FC-2C7AE3F12DBA v2
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to verify settings"
10.12.11.1 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.
1MRK 506 377-UEN Rev. K
Section 10
Testing functionality by secondary injection
Railway application RER670
153
Commissioning manual
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