9.4.3.1
Verifying the settings
SEMOD54358-35 v11
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 6)
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.
9.4.3.2
Completing the test
SEMOD54358-38 v4
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.
9.4.4
Loss of voltage check LOVPTUV
SEMOD175023-3 v5
Prepare the IED for verification of settings as outlined in section
and
in this chapter.
9.4.4.1
Measuring the operate limit of set values
SEMOD175023-7 v7
1.
Check that the input logical signals BLOCK, CBOPEN and VTSU are logical zero.
2.
Supply a three-phase rated voltage in all three phases and note on the local HMI that the
TRIP logical signal is equal to the logical 0.
3.
Switch off the voltage in all three phases.
After set
tTrip time a TRIP signal appears on the corresponding binary output or on the
local HMI.
Section 9
1MRK 505 385-UEN C
Testing functionality by secondary injection
74
Breaker protection REQ650
Commissioning manual
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