Completing The Test; Two Step Overvoltage Protection Ov2Ptov; Verifying The Settings - ABB REB670 Commissioning Manual

Section 10
Testing functionality by secondary injection
10.5.1.2
10.5.2
10.5.2.1
114
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
to 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>.
The operate value in secondary volts is calculated according
to the following equations:
For phase-to-earth measurement:
U UBase VT
1 sec
>
× ×
100 VTprim
3
IECEQUATION2426 V1 EN-US
For phase-to-phase measurement:
U 1 VT sec
>
UBase
× ×
VTprim
100
IECEQUATION2427 V1 EN-US
4. Decrease the voltage slowly and note the reset value.
1MRK 505 372-UEN A
M13796-35 v8
M13796-25 v5
M13806-2 v6
"Preparing the IED
M13806-9 v2
M13806-50 v9
(Equation 18)
(Equation 19)
Busbar protection REB670 2.2 IEC
Commissioning manual