
Feeder Terminal
REF 541, REF 543, REF 545.
1MRS750443-MBG
46
LOAD SHEDDING AND
RESTORATION
81-1
f1
Underfrequency or
overfrequency inc. rate of
change, stage 1
Freq1St1
X
81-2
f2
Underfrequency or
overfrequency incl. rate of
change, stage 2
Freq1St2
X
81-3
f3t
Underfrequency or
overfrequency incl. rate of
change, stage 3
Freq1St3
X
81-4
f4
Underfrequency or
overfrequency incl. rate of
change, stage 4
Freq1St4
X
81-5
f5
Underfrequency or
overfrequency incl. rate of
change, stage 5
Freq1St5
X
ADDITIONAL FUNCTIONS
79
O
I
Auto-reclosure
AR5Func
X
X
X
25-1
SYNC1
Synchro-check/voltage
check, stage 1
SCVCSt1
X
X
X
25-2
SYNC2
Synchro-check/voltage
check, stage 2
SCVCSt2
X
X
X
68
3I2f >
Three-phase inrush detector Inrush3
X
X
60
FUSEF
Fuse failure supervision
FuseFail
X
X
X
46
Iub>
Phase discontinuity
CUB3Low
X
X
62BF
CBFP
Circuit breaker failure
-
X
X
X
49M/G/T 3Ithdev> Three-phase thermal
overload protection for
devices
TOL3Dev
X
48
Is2t n<
Start-up supervision for
motors
MotStart
X
47-1
U1U2<>_
1
Three-phase phase-
sequency voltage protection,
stage 1
PSV3St1
X
47-2
U1U2<>_
2
Three-phase phase-
sequency voltage protection,
stage 2
PSV3St2
X
Functionality levels, protection functions
FUNCTIONALITY LEVELS
ANSI
Code
IEC
Symbol
Function
Code
REF541/3/5
CONTROL
REF541/3/5
BASIC
REF541/3/5
MULTI
Functionality levels, other functions
FUNCTIONALITY LEVELS
ANSI
Code
IEC
Symbol
Function
Code
REF541/3/
5
CONTROL
REF541/3/
5 BASIC
REF541/3/
5 MULTI
MEASUREMENT
FUNCTIONS
CURRENT
3I
3I
Three-phase current
MECU3A
X
X
X
3I_B
3I_B
Three-phase current, B
stage
MECU3B
X
X
X
Io
Io
Neutral current
MECU1A
X
X
X
Io_B
Io_B
Neutral current, B stage
MECU1B
X
X
X
VOLTAGE
3U
3U
Three-phase voltage
MEVO3A
X
X
X