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Section 10
Testing functionality by secondary injection
( )
t s
IECEQUATION2429 V1 EN-US
where:
t(s)
k1
U
U1>
8.
Repeat the test for Step 2 of the function.
10.5.3.3
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.
10.5.4
Voltage differential protection VDCPTOV
Prepare the IED for verification of settings as outlined in section
"Preparing for test"
10.5.4.1
Function revision history
Document
revision
A
B
C
D
E
F
H
J
10.5.4.2
Check of undervoltage levels
This test is relevant if the setting BlkDiffAtULow = Yes.
Check of U1Low
Procedure
1.
Connect voltages to the IED according to valid connection diagram and figure 14.
2.
Apply voltage higher than the highest set value of UDTrip, U1Low and U2Low to the U1 three-
phase inputs and to one phase of the U2 inputs according to figure 14.
The voltage differential START signal is set.
102
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
in this chapter.
Product
History
revision
2.2.1
-
2.2.1
-
2.2.2
-
2.2.3
-
2.2.3
-
2.2.4
-
2.2.4
-
2.2.5
-
© 2017 - 2022 Hitachi Energy. All rights reserved
1MRK 505 372-UEN Rev. K
"Requirements"
and section
GUID-04679E4E-E0D2-4BA6-A002-4020E52DB973 v1
Busbar protection REB670
Commissioning manual
(Equation 20)
SEMOD54358-38 v4
SEMOD175258-3 v2
SEMOD175258-71 v2
SEMOD175258-75 v3
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