1140V AC Molded Case Circuit Breaker

The SYM3-1140V AC Molded Case Circuit Breaker, supplied by Chinese manufacturer Zhejiang Soutya New Energy LLC, is a 1140 V AC, 250-800 A three-pole moulded-case circuit-breaker with 25-85 kA breaking capacity, featuring adjustable thermal-magnetic releases and positive-contact indication, engineered for main-incomer and feeder protection in commercial switchboards, industrial plants and mining power systems.

Application scenarios

1. AC Solar Combiner Boards – SYM3-250/400 A three-pole MCCBs gather multiple string-inverter outputs in 380 V/440 V arrays, delivering 25 kA–50 kA short-circuit protection and load-break isolation for the main utility feed.

2. Commercial Distribution Panels – Rated 63 A–630 A, they feed HVAC, lifts and lighting risers in offices, malls and hospitals, providing adjustable thermal-magnetic trips for selective discrimination.

3. Industrial Motor Circuits – 50 kA breaking capacity and Class-10 overload curves safeguard 15 kW–250 kW pumps, compressors and conveyors against locked-rotor and phase-fault events.

4. Data-Centre UPS Busbars – 320 A/400 A frame sizes protect paralleled UPS strings and battery racks, ensuring 99.999 % availability with fast 25 ms arc-fault clearance.

5. EV Fast-Charging Stations – 100 A–250 A breakers isolate 60 kW–180 kW DC chargers, coping with high inrush and harmonic loads while meeting IEC 60947-2 and local utility codes.