Logic Diagram - ABB REG650 Technical Manual

1MRK 502 043-UUS B
8.10.7.4
MaxPhCurr
PickupCurr
MinPh-Ph Voltage
ANSI10000214 V2 EN
Figure 116: Simplified internal logic diagram for overcurrent function
ANSI10000213 V2 EN
Figure 117: Simplified internal logic diagram for undervoltage function
Technical Manual
current value for the calculation of operate times for IDMT curves (the overcurrent
with IDMT curve operates faster during low voltage conditions).

Logic diagram

a
b
X
Voltage
control or
restraint
feature
MinPh-PhVoltage
PickupVolt
Operation_UV=Disabled
BLKUV
DEF time
selected
a>b
Inverse
time
selected
a
b>a
b
Section 8
Current protection
0-tDef_OC
0
OR
Inverse
ANSI10000214-2-en.vsd
DEF time
0-tDef_UV
selected
0
AND
ANSI10000213-2-en.vsd
TROC
PU_OC
PU_UV
249