UL1
UL2
UL3
UN
UL1
UL1
UL2
UL3
IE
D
T
E
S
T
S
E
T
IE
D
IEC07000106-1-en.vsd
UL2
UL3
UN
1
2
IEC07000106 V2 EN-US
Figure 27:
Connection of the test set to the IED for test of U1 block level
where:
1
is three-phase voltage group1 (U1)
2
is three-phase voltage group2 (U2)
3.
Decrease slowly the voltage in phase UL1 of the test set until the START signal resets.
4.
Check U1 blocking level by comparing the voltage level at reset with the set undervoltage
blocking
U1Low
.
5.
U1Low
for the other phases.
The connections to U1 must be shifted to test another phase. (UL1 to UL2, UL2 to
UL3, UL3 to UL1)
Check of U2Low
SEMOD175258-91 v3
Procedure
1.
Connect voltages to the IED according to valid connection diagram and figure
.
1MRK 511 403-UEN Rev. L
Section 11
Testing functionality by secondary injection
Bay control REC670
125
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Содержание REC670
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