Page 85 - SACE Tmax XT - Catalogue

PROTECTION TRIP UNITS 3/51

03

ABB Code ANSI Code Function Threshold Range Threshold Step Trip Time Time Step Excludability Excludability trip Pre-Allarm Curve
Protections
L 49 Overload according to 60947-2 I1 = 0.4…1 x In 0.001 x In XT2-XT4 : t1 = 3…60 s @ 3 x I1 1 s no no 50%...90% I1 step 1% t = k/I 2
XT5: t1 = 3…48 s @ 3 x I1
XT7: t1 = 3…144 s @ 3 x I1
49 Overload according to 60255-151 I1 = 0.4…1 x In 0.001 x In t1 = 3…144 s for XT7 1 s no no 50%...90% I1 step 1% t= (k t1)/((if/I1)α-1)
t1 = 3…9 s for XT2-XT4-XT5
SI: k=0.14; α=0.02
VI: k=13.5; α=1
EI: k=80; α=2
SI: k=0.14; α=0.02
t = k / I 4: k=80; α=4
S 50 TD Time-delayed overcurrent I2 = 0.6…10 x In 0.1 x In XT2 - XT4 : t2 = 0.05…0.4 s 0.01 s yes yes no t = k
XT5: t2 = 0.05…0.5 s
XT7: t2 = 0.05…0.8 s
68 Zone selectivity t2sel = 0.04…0.2 s @ 10 x In 0.01 s yes
Start up Activation: 0.6…10 x In 0.1 x In Range: 0.1 … 30s 0.01 s yes
51 Time-delayed overcurrent I2 = 0.6…10 x In 0.1 x In XT2 - XT4 : t2 = 0.05…0.4 s @ 10 x In 0.01 s yes yes no t = k/I 2
XT5: t2 = 0.05…0.5 s @ 10 x In
XT7: t2 = 0.05…0.8 s @ 10 x In
I 50 Instantaneous short-circuit XT2-XT4-XT5: I3 = 1.5…10 x In 0.1 x In Instantaneous yes no no t = k
XT7: I3 = 1.5…15 x In
Start up Activation: 0.1 x In Range: 0.1 … 30s 0.01 s yes
XT2-XT4-XT5: I3 = 1.5…10 x In
XT7: I3 = 1.5…15 x In
G (1) 50N TD Earth fault I4 = 0.1…1 x In 0.001 x In t4 = Inst.0.1 …1 s with I > I4 0.05 s yes yes 50%...90% I4 step 1% t = k
68 Zone selectivity t4sel = 0.04…0.2 s 0.01 s yes
Start up Activation: 0.2…10 x In 0.02 x In Range: 0.1 … 30s 0.01 s yes
51N Earth fault I4 = 0.1…1 x In 0.001 x In t4 = 0.1…1 s 0.05 s yes yes 50%...90% I4 step 1% t = k/I 2
N Neutral On/Off 50%-100%-200% yes
of the phases
2I 50 Programmable 2nd Instantaneous XT2-XT4-XT5: I3 = 1.5…10 x In 0.1 x In Instantaneous yes no no t = k
short-circuit XT7: I3 = 1.5…15 x In
MCR Closing on short-circuit XT2-XT4-XT5: I3 = 1.5…10 x In 0.1 x In Instantaneous 0.01 s yes no no t = k
XT7: I3 = 1.5…15 x In Monitor time range 40…500 ms
IU 46 Current unbalance I6 = 2…90% In unbalance 1% In t6 = 0.5…60 s 0.5 s yes yes no t = k
LC1/2 - Current threshold LC1 = 50…100% x I1 1% yes only signaling no
Iw1/2 Activation up/down LC2 = 50…100% x I1 1%
Iw1 = 0.1…10 x In 0.01 x In
Iw1 = 0.1…10 x In
S2 50 TD 2nd Time-delayed overcurrent I2 = 0.6…10 x In 0.1 x In XT2 - XT4 : t2 = 0.05…0.4 s 0.01 s yes yes no t = k
XT5: t2 = 0.05…0.5 s
XT7: t2 = 0.05…0.8 s
68 Zone selectivity t5sel = 0.04…0.2s 0.01 s yes yes
Start up Activation: 0.6…10 x In 0.1 x In Range: 0.1 … 30s 0.01 s yes
Phase Sequence 47 Cyclical direction of the phases 1-2-3 or 3-2-1 yes only signaling no
UV 27 Undervoltage U8 = 0.5….0.98 x Un 0.001 x Un t8 = 0.05…120 s 0.01 s yes yes no t = k
OV 59 Overvoltage U9 = 1.02….1.5 x Un 0.001 x Un t9 = 0.05…120 s 0.01 s yes yes no t = k
UV2 27 2nd Undervoltage U15 = 0.5….0.98 x Un 0.001 x Un t15 = 0.05…120 s 0.01 s yes yes no t = k
OV2 59 2nd Overvoltage U16 = 1.02….1.5 x Un 0.001 x Un t16 = 0.05…120 s 0.01 s yes yes no t = k
VU 47 Voltage unbalance U14 = 2…90 % Un unbalance 1% Un t14 = 0.5…60 s 0.5 s yes yes no t = k
S(V) 51V Voltage controlled overcurrent I20 = 0.6...10 x In 0.1 x In t20 = 0.05…30 s 0.01 s yes yes no t = k
Step mode (controlled mode) Ul = 0.2…1 x Un 0.01 x Un
Ks = 0.1…1 0.01
51V Linear mode (restrained mode) Ul = 0.2…1 x Un 0.01 x Un
Uh = 0.2…1 x Un 0.01 x Un
Ks = 0.1…1 0.01