Page 43 - Sace Emax 2 Catalogue

PROTECTION TRIP UNITS 3/19

03

ABB Code ANSI/IEEE Function Threshold Trip time (3) Excludibility Pre Alarm Trip curve Ekip Dip
C37.2 Code
L 49 Overload protection I1 = 0.4 - 0.42 - 0.45 - 0.47 - 0.5 - 0.52 - 0.55 - 0.57 - 0.6 - 0.62 - 0.65 - 0.67 - 0.7 - with If = 3 I1, t1 = 3 - 12 - 24 - 36 - 48 - 72 - 108 - 144s (2) no 50 ... 90% I1 t = k / I 2
0.72 - 0.75 - 0.77 - 0.8 - 0.82 - 0.85 - 0.87 - 0.9 - 0.92 - 0.95 - 0.97 - 1 x In Step 1%
Thermal memory no
Tolerance trip between 1.05 and 1.2 x I1 ± 10% If ≤ 6 x In
± 20% If > 6 x In
S 50TD Time-delayed overcurrent protection I2 = 0.6 - 0.8 - 1 - 1.5 - 2 - 2.5 - 3 - 3.5 - 4 - 5 - 6 - 7 - 8 - 9 - 10 x In with If > I2, t2 = 0.1 - 0.2 - 0.3 - 0.4 - 0.5 - 0.6 - 0.7 - 0.8s yes - t = k
Tolerance ± 7% If ≤ 6 x In The better of the two data:
± 10% If > 6 x In ± 10% t2 or ± 40 ms
51 Time-delayed overcurrent protection I2 = 0.6 - 0.8 - 1 - 1.5 - 2 - 2.5 - 3 - 3.5 - 4 - 5 - 6 - 7 - 8 - 9 - 10 x In with If = 10 In, t2 = 0.1 - 0.2 - 0.3 - 0.4 - 0.5 - 0.6 - 0.7 - 0.8s yes - t = k / I 2
Thermal memory yes -
Tolerance ± 7% If ≤ 6 x In ± 15% If ≤ 6 x In
± 10% If > 6 x In ± 20% If > 6 x In
I 50 Instantaneous overcurrent protection I3= 1.5 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 x In Instantaneous yes - t = k
Tolerance ± 10% ≤ 30 ms
G 50N TD Earth fault protection I4 = 0.1 - 0.2 - 0.3 - 0.4 - 0.6 - 0.8 - 1 x In with If > I4, t4 = 0.1 - 0.2 - 0.4 - 0.8s yes 50 ... 90% I4 t = k
(1)
Step 1%
Tolerance ± 7% The better of the two data:
± 10% t4 or ± 40 ms
51N Earth fault protection I4 = 0.1 - 0.2 - 0.3 - 0.4 - 0.6 - 0.8 - 1 x In with If = 3In, t4 = 0.1 - 0.2 - 0.4 - 0.8s yes 50 ... 90% I4 t = k / I 2
(1)
Step 1%
Tolerance ± 7% ± 15%