7.
Check the inverse time delay by injecting a voltage corresponding to 1.2 × U1>.
8.
Repeat the test to check the inverse time characteristic at different over-voltage levels.
9.
Repeat the above-described steps for Step 2 of the function.
12.6.2.2
Extended testing
GUID-BE4B4A36-CCEE-4020-B7DC-6A83A43D11F5 v2
1.
The tests above can be repeated for
2 out of 3 and for 3 out of 3 operation mode.
12.6.2.3
Completing the test
M13806-43 v6
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.
12.6.3
Two step residual overvoltage protection ROV2PTOV
SEMOD54358-3 v6
Prepare the IED for verification of settings as outlined in section
in this chapter.
12.6.3.1
Verifying the settings
SEMOD54358-35 v10
1.
Apply a single-phase voltage either to a single-phase voltage input or to a residual
voltage input with the start value below the set value
U1>.
2.
Slowly increase the value until ST1 appears.
3.
Note the operate value and compare it with the set value.
4.
Decrease the voltage slowly and note the reset value.
5.
Set and apply a 20% higher voltage than the measured operate value for one phase.
6.
Measure the time delay for the TR1 signal and compare it with the set value.
7.
Check the inverse time delay by injecting a voltage corresponding to 1.2 × U1>.
For example, if the inverse time curve A is selected, the trip signals TR1
and TRIP operate after a time corresponding to the equation:
t s
k
U
U
( )
=
>
−
1
1
1
IECEQUATION2429 V1 EN-US
(Equation 99)
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
8.
Repeat the test for Step 2 of the function.
1MRK 502 067-UEN B
Section 12
Testing functionality by secondary injection
185
Commissioning manual