Feeder Terminal
REF 541, REF 543, REF 545.
1MRS750443-MBG
68
Application selection tables for REF 541, REF 543 and REF 545
functions
.
1)
These functions are only supported in the feeder termi-
nal revisions of Release 1.5 or later.
2)
These functions are only supported in the feeder termi-
nal revisions of Release 2.0 or later
.
3) These functions are only supported in the feeder termi-
nal revisions of Release 2.5 or later.
4) This function is only supported in the feeder terminal
revisions of Release 3.5 or later.
Table 20: Protection functions
Function
ANSI
device no.
IEC symbol Description
AR5Func
79
O-->I
Auto-reclose function (5 shots)
CUB1Cap
2)
51NC-1
dI>C
Current unbalance protection for shunt capacitor banks
CUB3Cap
3)
51NC-2
3dI>C
Three-phase current unbalance protection for H-bridge
connected shunt capacitor
CUB3Low
46
Iub>
Phase discontinuity protection
DEF2Low
67N-1
Io>-->
Directional earth-fault protection, low-set stage
DEF2High
67N-2
Io>>-->
Directional earth-fault protection, high-set stage
DEF2Inst
67N-3
Io>>>-->
Directional earth-fault protection, instantaneous stage
DOC6Low
1)
67-1
3I>-->
Three-phase directional overcurrent protection, low-set stage
DOC6High
1)
67-2
3I>>-->
Three-phase directional overcurrent protection, high-set stage
DOC6Inst
1)
67-3
3I>>>-->
Three-phase directional overcurrent protection, instantaneous
stage
FLOC
4)
21FL
FLOC
Fault locator
Freq1St1
1)
81-1
f1
Underfrequency or overfrequency protection, stage 1
Freq1St2
1)
81-2
f2
Underfrequency or overfrequency protection, stage 2
Freq1St3
1)
81-3
f3
Underfrequency or overfrequency protection, stage 3
Freq1St4
1)
81-4
f4
Underfrequency or overfrequency protection, stage 4
Freq1St5
1)
81-5
f5
Underfrequency or overfrequency protection, stage 5
FuseFail
3)
60
FUSEF
Fuse failure supervision
Inrush3
68
3I2f>
Three-phase transformer inrush and motor start-up current
detector
MotStart
2)
48
Is2t n<
Three-phase start-up supervision for motors
NEF1Low
51N-1
Io>
Non-directional earth-fault protection, low-set stage
NEF1High
51N-2
Io>>
Non-directional earth-fault protection, high-set stage
NEF1Inst
51N-3
Io>>>
Non-directional earth-fault protection, instantaneous stage
NOC3Low
51-1
3I>
Three-phase non-directional overcurrent protection, low-set
stage
NOC3High
51-2
I>>
Three-phase non-directional overcurrent protection, high-set
stage
NOC3Inst
51-3
3I>>>
Three-phase non-directional overcurrent protection,
instantaneous stage
OL3Cap
2)
51C
3I>3I<
Three-phase overload protection for shunt capacitor banks
OV3Low
59-1
3U>
Three-phase overvoltage protection, low-set stage
OV3High
59-2
3U>>
Three-phase overvoltage protection, high-set stage
PSV3St1
2)
47-1
U1U2<>_1
Phase-sequence voltage protection, stage 1
PSV3St2
2)
47-2
U1U2<>_2
Phase-sequence voltage protection, stage 2
ROV1Low
59N-1
Uo>
Residual overvoltage protection, low-set stage
ROV1High
59N-2
Uo>>
Residual overvoltage protection, high-set stage
ROV1Inst
59N-3
Uo>>>
Residual overvoltage protection, instantaneous stage
SCVCSt1
1)
25-1
SYNC1
Synchro-check / voltage-check function, stage 1
SCVCSt2
1)
25-2
SYNC2
Synchro-check / voltage-check function, stage 2
TOL3Cab
1)
49F
3Ith>
Three-phase thermal overload protection for cables
TOL3Dev
2)
49M/G/T
3Ithdev>
Three-phase thermal overload protection for devices
UV3Low
27-1
3U<
Three-phase undervoltage protection, low-set stage
UV3High
27-2
3U<<
Three-phase undervoltage protection, high-set stage