Hitachi Relion 670 Series Commissioning Manual page 250

Section 11
Testing functionality by secondary injection
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
11.13.7.3 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.
11.13.8 Voltage harmonic monitoring VHMMHAI(VTHD)
Prepare the IED for verification of settings outlined in Section
11.13.8.1 Function revision history
Document
revision
D
E
F
G
H
J
L
M
11.13.8.2 Verifying the signals and settings
The voltage can be injected using common test equipment.
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.
244
2 to 6 for the harmonics until 9
Product History
revision
2.2.3 -
2.2.3 -
2.2.4 -
2.2.4 -
2.2.4 -
2.2.5
Updated monitoring till 9
th
monitoring till 5
2.2.6 -
2.2.6 -
© 2017 - 2023 Hitachi Energy. All rights reserved
th
order.
"Preparing the IED to verify
th
order voltage harmonics. Refer to document revision H for
order voltage harmonics.
1MRK506371-UUS Rev. M
GUID-EDB51B29-9556-4EF4-94E6-5DC6B8C0F13A v1
GUID-B2F24353-AAEA-4520-BB1C-5FD5FFCFC67B v1
GUID-804F309E-B02F-4F6B-B0FC-2C7AE3F12DBA v2
settings".
GUID-E828F930-88FF-4D5B-8304-2BD3B89919B8 v2
GUID-1A5BBF82-94AE-4E87-B951-CA007CC36CF1 v1
GUID-3E56D8AC-9461-4EEA-83A8-522CA177563E v1
Line distance protection REL670
Commissioning manual