ABB RELION 670 Series Technical Manual page 884

Section 14
Control
VCCT4
VCCT3
VCCT2
VCCT1
ADAPT
ActualUser
Vdeadband
LoadVoltage
HOMING
OperSimTap
ANSI06000521 V1 EN-US
Figure 467: Simplified logic for simultaneous tapping prevention
878
a
a=b
AND
b
T4PG
a
NOT
a=b
AND
b
T3PG
a
NOT
a=b
AND
b
T2PG
a
NOT
a=b
AND
b
MAX
T1PG
a
a=b
AND
b
a
NOT
a=b
AND
b
T2PG
a
NOT
a=b
AND
b
T3PG
a
NOT
a=b
AND
b
T4PG
MIN
a
S a=b
b
S
a
a=b
b
NOT
AND
T4
AND
AND
T3
AND
AND
T2
AND
AND
T1
AND
T1
AND
AND
T2
AND
AND
T3
AND
AND
T4
OR
OR
NOT
OR
OR
AND
SIMLOWER
OR
OR
AND
SIMRAISE
OR
en06000521_ansi.vsd
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Technical manual