Page 77 - MCCB-XT2-XT4

P. 77

ABB | SACE Tmax XT

12 - Performance table

General notes: • The performance values given in the next table are valid with  100 ms trip time, temperature
and signals within the operating limits; failure to comply with these limitations could lead to an
increase in the tolerances.
• Ekip Touch sends the TRIP command if the signal read exceeds the threshold for longer than the
set time (or the time resulting from the calculation formula)
• With an inverse time-delay trip curve, the calculation refers to a signal with a constant value
throughout the timing: variation of the alarm signal causes a different trip time
• The additional notes are given after all the tables

Standard Protections Protection Trip threshold
[ANSI code] Trip time t t (1) tolerance (3) Trip time tolerance (3)

(with curve t = k / I ) Activation for If with If ≤ 6 In: ± 10 % / with If > 6
2
L [49] within range: (1.05 to In: ± 20 %
1.2) x I1
(with curves 60255-151)
t = t2 ( with curve t = The best between ± 10% and 40
t
k ) ms
S [50TD / 51] with If ≤ 6 In: ± 7 % /
with If > 6 In: ± 10 % with If ≤ 6 In: ± 15 % / with If > 6
In: ± 20 %
(with curve t = k / I )
2
with If ≤ 6 In: ± 7 % / The best between ± 10% and 40
S2 [50TD] t = t5
t with If > 6 In: ± 10 % ms
I [50] t ≤ 30 ms ± 10 % --
t
t = t4 ( with curve t = The best between ± 10% and 40
t
k ) ms (2)
G [50N TD / ± 7 %
51N]
± 15 %
2
(with curve t = k / I )
MCR t ≤ 30 ms ± 10 % --
t
2I [50] (10) ± 10 % --
with t6 ≥ 5 s: ± 100 ms / with t6 <
IU [46] t = t6 ± 10 % 5 s the best between ± 10 % and
t
± 40 ms

Startup
Protection Trip time t Trip threshold Trip time tolerance
[ANSI code] t tolerance (3)
with If ≤ 6 In: ± 7
S StartUp t = t2 startup % / with If > 6 In: The best between ± 10% and 40
t ms
± 10 %
I StartUp t ≤ 30 ms ± 10 % --
t
The best between ± 10% and 40
G StartUp t = t4 startup ± 7 %
t ms
with If ≤ 6 In: ± 7 The best between ± 10% and 40
S2 StartUp t = t5 startup % / with If > 6 In:
t ms
± 10 %

72 73 74 75 76 77 78 79 80 81 82