ABB RES670 Technical Manual page 381

1MRK 511 408-UUS A
Phasor measurement unit RES670 2.2 ANSI
Technical manual
DVDI Detection
DVDI detection Phase 1
IA
IB
DI detection based on sample analysis
IC
DIPU
VA
DV detection based on sample analysis
DVPU
a
b
VPPU
IA
DVDI detection Phase 2
IB
IC
VB
IA
DVDI detection Phase 3
IB
IC
VC
VA
a
a<b
b
IA
a
a>b
b
50P
52A
VB
a
a<b
b
IB
a
a>b
b
VC
a
a<b
b
IC
a
a>b
b
ANSI12000166 V3 EN-US
Figure 131: Simplified logic diagram for the DV/DI detection part
Secondary system supervision
1.5 cycle
20 ms
a>b
t
t
Same logic as for phase 1
Same logic as for phase 1
AND
OR
AND OR
AND
OR
AND
OR
AND
OR
AND
OR
Section 13
DeltaIA
AND
DeltaVA
DeltaIB
DeltaVB
DeltaIC
DeltaVC
AND
AND
AND
FuseFailDetDVDI
AND
ANSI12000166-3-en.vsd
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