HSTW1 Series Intelligent Universal Circuit Breaker i. E. ACB, is mainly used in the low voltage distribution switchboard to control and protect power distribution system. Its technical index reaches the international advanced standard of that kind of products in 1990s and conforms to criteria for low voltage breaker in IEC60947-2.

Pole: 3 or 4
Rated Ultimate Short-circuit Breaking Capacity Icu(kA)(effective value)
AC400V: 80, 100, 120
AC690V: 50, 65, 75
Rated Ultimate Short-circuit Breaking Capacity Icu(kA)(effective value)
AC400V: 50, 80, 100
AC690V: 50, 65
Rated Short-circuit making Capacity Icm(kA)(peak)
AC400V: 176, 220
AC690V: 105, 143, 165

Rated Short-circuit Withstand Current (1s)Icw(kA)(effective value)
AC400V: 50, 80, 100
AC690V: 40, 50, 65
Dielectric Capability: AC50Hz 3600V/min
frame Rated Current Inm(A): 2000, 3200, 4000, 5000
Rated current In(A): 630, 800, 1000, 1250, 1600, 2200, 2500, 2900, 3200, 3600, 4000, 5000
Rated operational voltage Ue(V): AC50Hz 400, 690
Rated Insulation Voltage Ui(V): AC50Hz, 1000