Page 84 - SACE Tmax XT - Catalogue
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3/50             SACE TMAX XT LOW VOLTAGE MOLDED CASE CIRCUIT-BREAKERS



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          Protection settings









          Available settings for each protection function:

          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
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