Document
revision
Product
revision
History
H
2.2.4
-
J
2.2.4
-
K
2.2.5
Updated monitoring till 9
th
order current harmonics. Refer to document revision J for
monitoring till 5
th
order current harmonics.
11.13.9
Current harmonic monitoring CHMMHAI
GUID-692151F8-812B-4B32-AE86-E7A4E4B0101B v1
GUID-804F309E-B02F-4F6B-B0FC-2C7AE3F12DBA v2
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to verify settings"
11.13.9.1
Verifying the signals and settings
GUID-026F1A4F-E9A8-43DC-87E1-0831E0123E50 v1
The current can be injected using common test equipment.
Verifying the warning and alarm time limit of THD, WrnLimitTHD and tDelayAlmTHD
GUID-92992D84-BDAA-436F-9D2E-3770A29EF956 v1
1.
Supply the IED with current at rated value.
2.
Apply harmonics at the numerical multiple of fundamental frequency along with the injected
current 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 TDD, WrnLimitTDD and tDelayAlmTDD
GUID-3C346AFB-C073-4CA8-A471-57B04D9170DE v1
1.
Supply the IED with current at rated value.
2.
Apply harmonics at the numerical multiple of fundamental frequency along with the injected
current signal.
3.
Slowly increase the harmonic amplitudes until the TDDWRN 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 TDDALM signal appears and note
down the time from TDDWRN set to TDDALM 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-C10AB22D-5FC7-47B4-B619-EAC46D1C2ECF v3
1.
Supply the IED with current at rated value.
2.
Apply 2
nd
order harmonic along with injected current 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.
11.13.9.2
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.
1MRK 511 403-UEN Rev. L
Section 11
Testing functionality by secondary injection
Bay control REC670
197
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Содержание REC670
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