New Blue Sky Elec possessing more than 70 domestic and international patents; all of our circuit breakers have passed CCC,CB,CE,EMC,TUV,ROHS,SNI,NOM and other international authoritative certifications. Our products use improvement of structure for circuit breaker (with invention patents); sharply increased the mcb electrical performance and lower the cost.After years of R & D work, our products have become the leader in circuit breaker field.