Completing The Test; Two Step Overvoltage Protection Ov2Ptov; Verifying The Settings - ABB rec670 Commissioning Manual

1MRK 511 360-UEN A
10.5.1.2
10.5.2
10.5.2.1
Bay control REC670 2.1 IEC
Commissioning manual
Testing functionality by secondary injection
For example, if the inverse time curve A is selected, the trip
signals TR1 and TRIP operate after a time corresponding to the
equation:
k 1
( )
=
t s
 
U
−
 1 
<
 
U
1
IECEQUATION2428 V1 EN
where:
t(s) Operate time in seconds
k1 Settable time multiplier of the function for step 1
U Measured voltage
U1< Set start voltage for step 1
For example, if the measured voltage jumps from the rated value to 0.8 times the
set start voltage level and time multiplier k1 is set to 0.05 s (default value), then
the TR1 and TRIP signals operate at a time equal to 0.250 s ± tolerance.
10. The test above can be repeated to check the inverse time characteristic at
different voltage levels.
11. Repeat the above-described steps for Step 2 of the function.
Extended testing
The tests above can be repeated for 2 out of 3 and for 3 out of 3 operation mode.

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.

Two step overvoltage protection OV2PTOV

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

Verifying the settings

Verification of single-phase voltage and time delay to operate for Step
1
1. Apply single-phase voltage below the set value U1>.
2. Slowly increase the voltage until the ST1 signal appears.
3. Note the operate value and compare it with the set value U1>.
Section 10
(Equation 22)
"Preparing the IED to
119