NS 3P 250A Moulded case circuit breaker/MCCB

NS series moulded case circuit breaker NS series moulded case circuit breaker/mccb is one of the most advanced type breakers in the world, which adopt international advanced design and manufacture fechnology. They are suitable for short circuit and overload protection for circuit of AC 690V 50/60Hz, rated current from 12.5A to 630A. It takes protect effect when mouse cage motors non-frequent start, breaking off working and protecting overload, short circuit and lacking voltage.Tripping Characteristics of MCCB Rated Current of Release(A) Thermodynamic Release (ambient temp +40C) Operational Current of Magnetic Release(A) 1.05In(cold state) inoperative time(h) 1.30In(heat state) operative time(h) In≤ 63 ≥ 1 <1 10In+20% 63 ≥ 2 <2 10In +20% 100 ≥ 2 <2 5-10In+20%Rated Current of Release(A) Thermodynamic Release (ambient temp +40C) Operational Current of Magnetic Release(A) 1.0In(cold state)operative time(h) 1.20In(heat state)operative time(h) 1.50In(heat state)operative time(h) 1.01In(heat state)operative time(h) 12.5≤ In≤ 400 ≥ 2 <2 ≤ 4min S 12In+20%Main Technical Specifications Type Rated Current (A) Poles Rated Insulating Voltage(A) Rated Operating Voltage (A) Acting Over Distance (mm) Ultimate short circuit Breaker Capacity Servies Short Circuit Breaker Capacity Operating performance(times) Rated current of release(A)Thermodynamic release(ambient temp+40 )Operation current of magnetic release(A)1.05ln(cold state) inoperative time(h)1.30ln(heat state) inoperative time(h)ln 631110ln 20%63 ln 1002210ln 20%100 ln 630225-10ln 20% Rated current of release(A)Thermodynamic release(ambient temp+40 )Operation current of magnetic release(A)1.0ln(cold state) inoperative time(h)1.20ln(heat state) inoperative time(h)1.50ln(heat state) inoperative time(h)1.0ln(heat state) inoperative time(h)12.5 ln 400224min2S Tp 10S12ln 20% Specifications: TypeRated current(A)Pole No.Rated insulating voltage (V)Rated operating voltageArcing over distance (mm)Ultimate short circuit breaking capacity(kA)Services short circuit breaking capacity(kA)Operation performance (Endurance)ONOFFNS-100D12.5, 16, 20, 25, 32, 40, 50, 63, 80, 1003 49506900181815008500NS-100N2525NS-100H7070NS-100L150150NS-160D16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 160252510007000NS-160N3636NS-160H7070NS-160L150150NS-250D160, 180, 200, 225, 250252510007000NS-250N3636NS-250H7070NS-250L150150NS-400D200, 225, 250, 300, 315, 400353510004000NS-400N1545NS-400H7070NS-400L150150NS-630D315, 350, 400, 500, 600, 630353510004000NS-630N4545NS-630H7070NS-630L150150