Function Revision History; Check Of Undervoltage Levels - Hitachi RED670 Commissioning Manual

Section 11
Testing functionality by secondary injection
11.6.5.1

Function revision history

Document
revision
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B
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J
11.6.5.2

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 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.
186
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 -
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1MRK 505 378-UEN Rev. K
GUID-04679E4E-E0D2-4BA6-A002-4020E52DB973 v1
SEMOD175258-71 v2
SEMOD175258-75 v3
Line differential protection RED670
Commissioning manual