Da
te
C
ode
20
011
009
SEL
-701-1 Monitor
SEL
OG
IC
®
Co
nt
ro
l Eq
u
at
io
n
s a
n
d
M
oni
to
r
Lo
g
ic
Se
le
cte
d Mo
nit
or L
og
ic Di
ag
ra
m
s
B.
37
Figure B.11
Current Unbalance Element Logic.
Avg.
|IA|
|IB|
|IC|
lav
FLA
46UBA
46UBT
lm
%UB = (|Iav-lm|/FLA) • 100%
Enable
%UB = (|Iav-lm|/lav) • 100%
46UBA
46UBT
Relay
Word
Bits
46UBAD
0
Settings
Max.Dev.
• 0.25
Enable
46UBTD
0
Inputs
IA =
IB =
IC =
FLA =
46UBA =
46UBT =
Avg. =
Iav =
Im =
46UBAD =
46 UBTD =
Phase Current
Phase Current
Phase Current
Full Load Amps Setting
Phase Current Unbalance Alarm Setting
Phase Current Unbalance Trip Setting
Average
Average Phase Current Magnitude
Magnitude of Current Having Max. Deviation From Iav
Phase Current Unbalance Alarm Delay
Phase Current Unbalance Trip Delay
Summary of Contents for SEL-701-1
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