Page 66 - SACE Tmax XT - Technical Catalogue

1/62 SACE TMAX XT LOW VOLTAGE MOLDED CASE CIRCUIT-BREAKERS

—

Characteristic curves

Specific let-through energy curves

440V

XT4 V-X XT5
440V 440V

I 2 t [10 6 A 2 s] I 2 t [10 6 A 2 s]
10 10

250 A
1 1

10 -1 10 -1

10 -2 10 -2
1 10 10 2 10 3 1 10 10 2 10 3
x I rms [kA] x I rms [kA]
Note: XT4X starting from In=32A

XT6 XT7 - XT7 M S-H-L
440V 440V

I 2 t [10 6 A 2 s] I 2 t [10 6 A 2 s]
10 3 10 3

10 2 10 2

250 A
10 10

1 1
1 10 10 2 10 3 1 10 10 2 10 3
x I rms [kA] x I rms [kA]