ABB Relion 670 series - Completing the Test; Frequency Protection; Underfrequency Protection SAPTUF (81); Verifying the Settings

Step No. Changes after step 4 Expected Output
WARNING TEST
5-a Retain the constant voltages* of
U
L1
= 63.5∠0° V, U
L2
=
63.5∠240° V, and U
L3
=
63.5∠120° V in secondary at
rated frequency.
Change U
N
= 3.0∠0° V in
secondary at rated frequency
WARNING signal should become HIGH after the
set time delay.
ALARM TEST
5-b Change U
N
= 4.0∠0° V in
secondary at rated frequency
ALARM signal should become HIGH after the set
time delay.
BFI_3P and TRIP TEST
5-c Change U
N
= 6.0∠0° V in
secondary at rated frequency
BFI_3P signal should become HIGH.
TRIP signal should become HIGH after the set time
delay.
* - VT ratios of the phase voltages and neutral voltages are considered as 400 kV/110 V. The value
UBase is considered as 110 V.
The voltage inputs U
L1
, U
L2
, and U
L3
refer to bus voltages and U
N
refers to the neutral voltage input.
11.7.4.2 Completing the test
GUID-08826C79-B8D8-471B-AD82-906A999ED095 v1
Continue to test another function or end the test by navigating to Main menu /Test /IED test mode /
TESTMODE:1 and change the IEDTestMode setting to Off. Restore connections and settings to their
original values, if they were changed for testing purposes.
11.8 Frequency protection
SEMOD53547-1 v1
11.8.1 Underfrequency protection SAPTUF (81)
M16289-2 v7
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to verify settings".
11.8.1.1 Verifying the settings
M16289-15 v3
Verification of PICKUP value and time delay to trip
M16289-17 v7
1. Check that the IED settings are appropriate, for example the pickup value and the time delay.
2. Supply the IED with three-phase voltages at their rated values and initial frequency.
The initial frequency is calculated using Equation
117.
0.02 /0.04 0.04
r
StartFrequency floor f StartFrequency


   
IECEQUATION16059 V1 EN-US (Equation 117)
3. Slowly decrease the voltage frequency bysteps of 40 mHz until the TRIP signal appears; during
each step apply the voltage signal for a time that is either at least 10% longer than (tDelay+100ms)
or a suitable time to monitor the function.
4. Note the frequency value at which the START signal appears and compare it with the set value
StartFrequency.
Section 11 1MRK 504 165-UUS Rev. J
Testing functionality by secondary injection
228 Transformer protection RET670
Commissioning manual
© 2017 - 2021 Hitachi Power Grids. All rights reserved