Completing The Test; Frequency Protection; Underfrequency Protection Saptuf (81); Verifying The Settings - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
Step No.
5-a
5-b
5-c
* - 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
11.6.4.2

Completing the test

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.
11.7

Frequency protection

11.7.1

Underfrequency protection SAPTUF (81)

Prepare the IED for verification of settings outlined in Section
11.7.1.1

Verifying the settings

Verification of PICKUP value and time delay to trip
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 37.
StartFrequency
IECEQUATION16059 V1 EN-US
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.
150
Changes after step 4
WARNING TEST
Retain the constant voltages* of
U = 63.5∠0° V, U =
L1 L2
63.5∠240° V, and U =
L3
63.5∠120° V in secondary at
rated frequency.
Change U = 3.0∠0° V in
N
secondary at rated frequency
Change U = 4.0∠0° V in
N
secondary at rated frequency
BFI_3P and TRIP TEST
Change U = 6.0∠0° V in
N
secondary at rated frequency
, U , and U refer to bus voltages and U
L1 L2 L3
   
0.02 floor f StartFrequency

r
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Expected Output
WARNING signal should become HIGH after the
set time delay.
ALARM TEST
ALARM signal should become HIGH after the set
time delay.
BFI_3P signal should become HIGH.
TRIP signal should become HIGH after the set time
delay.
refers to the neutral voltage input.
N
"Preparing the IED to verify
 
/ 0.04 0.04

1MRK 511 403-UUS Rev. K
GUID-08826C79-B8D8-471B-AD82-906A999ED095 v1
SEMOD53547-1 v1
M16289-2 v7
settings".
M16289-15 v3
M16289-17 v7
(Equation 37)
Bay control REC670
Commissioning manual