ABB Relion 670 Series Commissioning Manual page 127

1MRK 511 403-UEN Rev. K
( )
t s
IECEQUATION2428 V1 EN-US
where:
t(s)
k1
U
U1<
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.
11.5.1.2 Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.5.2 Two step overvoltage protection OV2PTOV
Prepare the IED for verification of settings as outlined in section
section
11.5.2.1 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>.
For phase-to-earth measurement:
U 1
100
IECEQUATION2426 V1 EN-US
For phase-to-phase measurement:
U 1
100
IECEQUATION2427 V1 EN-US
Bay control REC670
Commissioning manual
k
1
=
 
U
−
1
 
<
 
U 1
Operate time in seconds
Settable time multiplier of the function for step 1
Measured voltage
Set start voltage for step 1
"Preparing for test" in this chapter.
The operate value in secondary volts is calculated according to the following
equations:
UBase VT sec
>
× ×
VTprim
3
VT sec
>
UBase
× ×
VTprim
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Testing functionality by secondary injection
"Requirements" and
Section 11
(Equation 22)
M13796-35 v8
M13796-25 v5
M13806-2 v6
M13806-9 v2
M13806-50 v10
(Equation 23)
(Equation 24)
121