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
Figure 97:
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.
to check
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
Procedure
1.
Connect voltages to the IED according to valid connection diagram and
figure
.
1MRK 502 029-UEN A
Section 15
Verifying settings by secondary injection
195
Installation and commissioning manual
Содержание Relion 670 series
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