Hitachi RED670 - Function Revision History; Check of Undervoltage Levels

11.6.5.1 Function revision history
GUID-04679E4E-E0D2-4BA6-A002-4020E52DB973 v1
Document
revision
Product
revision
History
A 2.2.1 -
B 2.2.1 -
C 2.2.2 -
D 2.2.3 -
E 2.2.3 -
F 2.2.4 -
H 2.2.4 -
J 2.2.5 -
11.6.5.2 Check of undervoltage levels
SEMOD175258-71 v2
This test is relevant if the setting BlkDiffAtULow = Yes.
Check of U1Low
SEMOD175258-75 v3
Procedure
1. Connect voltages to the IED according to valid connection diagram and figure 47.
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
47.
The voltage differential START signal is set.
Section 11 1MRK 505 378-UEN Rev. K
Testing functionality by secondary injection
186 Line differential protection RED670
Commissioning manual
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