Completing The Test; Frequency Protection; Underfrequency Protection Saptuf; Verifying The Settings - ABB REG670 Commissioning Manual

1MRK 502 073-UEN A
13.6.6.3
13.7
13.7.1
13.7.1.1
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Commissioning manual
Testing functionality by secondary injection

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.

Frequency protection

Underfrequency protection SAPTUF

Prepare the IED for verification of settings outlined in Section
to verify settings".

Verifying the settings

Verification of START value and time delay to operate
1. Check that the IED settings are appropriate, for example the start 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 105.

StartFrequency 0.02
IECEQUATION16059 V1 EN-US
3. Slowly decrease the voltage frequency by steps of 40 mHz until the START
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.
5. Increase the frequency until its rated value is reached.
6. Check that the START signal resets.
7. Supply the IED with three-phase voltages at their rated values and frequency
20 mHz over the set value StartFrequency.
8. Decrease the frequency with a 40 mHz step, applying it for a time that is at
least 10% longer than (tDelay+100ms).
9. Measure the time delay of the TRIP signal, and compare it with the set value
tDelay. Note that the measured time consists of the set value of the time delay
plus the minimum operate time of the start function (80 - 90 ms).
Extended testing
  
floor f StartFrequency / 0.04

r
Section 13
SEMOD158990-34 v3
"Preparing the IED
 
0.04

(Equation 105)
SEMOD53547-1 v1
M16289-2 v7
M16289-15 v3
M16289-17 v7
M16289-31 v6
215