ABB RELION 670 Series Commissioning Manual page 102

Section 10
Testing functionality by secondary injection
10.4.3.1 Verifying the settings
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
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>.
t s
( )
IECEQUATION2429 V1 EN-US
where:
t(s)
k1
U
U1>
8. Repeat the test for Step 2 of the function.
10.4.3.2 Completing the test
Continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
10.4.4 Voltage differential protection VDCPTOV
Prepare the IED for verification of settings as outlined in the section
this chapter.
10.4.4.1 Check of undervoltage levels
This test is relevant if the setting
Check of U1Low
Procedure
1. Connect voltages to the IED according to valid connection diagram and figure 15.
2. Apply voltage higher than the highest set value of
three-phase inputs and to one phase of the U2 inputs according to figure 15.
The voltage differential START signal is set.
96
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
=
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
BlkDiffAtULow = Yes .
UDTrip , U1Low and U2Low to the U1
1MRK 505 339-UEN B
U1> .
TestMode setting to Off .
"Preparing for test"
Commissioning manual
SEMOD54358-35 v10
(Equation 20)
SEMOD54358-38 v4
SEMOD175258-3 v2
in
SEMOD175258-71 v2
SEMOD175258-75 v3