Section 11
Testing functionality by secondary injection
Verifying the warning and alarm time limit of THD, WrnLimitTHD and tDelayAlmTHD
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
1.
Supply the IED with voltage at rated value.
2.
Apply 2
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
11.13.11.2
Completing the test
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.
11.13.12
Function revision history
Document
revision
A
B
C
D
E
F
J
K
11.13.13
Fault current and voltage monitoring function FLTMMXU
Prepare the IED for verification of settings as outlined in section
for test"
in this chapter.
208
nd
order harmonic along with injected voltage signal.
2
to
6
for the harmonics until 9
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
New function release
© 2017 - 2021 Hitachi Power Grids. All rights reserved
nd
rd
th
th
, 3
, 4
...9
)
th
order.
"Requirements"
1MRK 511 403-UUS Rev. K
GUID-3E56D8AC-9461-4EEA-83A8-522CA177563E v1
GUID-17EC5D60-A748-46F4-8F13-A77E9CA3D17D v3
GUID-EDB51B29-9556-4EF4-94E6-5DC6B8C0F13A v1
GUID-0AA99E78-0C76-48B5-AA00-8E3201C0D263 v1
GUID-B976D374-CB18-441E-9A12-D4B351D6BF7F v1
GUID-22723399-65DD-44BD-B908-EDA67760065B v1
and section
"Preparing
Bay control REC670
Commissioning manual