It is used in rated current (In): 63A-800A, Rated operational voltage (Un): up to 660V(690V),AC50HZ (60HZ), Insulation voltage 800V,DC250V . Arc-over distance >= 50mm. Breaking capacity from 25KA to 85KA. Standard: IEC60947, GB14048 BLM2 series Mould Case Circuit Breakers are designed to product the cable, leading wires, bus bars, electric motors, transformers and power consumption Features: 1) Attractive design 2) High breaking capacity 3) Light weight plastic frame and parts 4) Reliable performance 5) Flame-resistant, shock-resistant 6) Long service life 7) Overload and short circuit protection within AC 50/60Hz circuits 8) Also used as an infrequent circuit switchover under normal conditions