Industrial Grade 1250A MCCB Circuit Breaker with Overload Protection for Three-Phase Systems

This industrial grade MCCB circuit breaker is designed for three-phase four-wire power supply systems. With a rated insulation voltage of 800V, it provides reliable protection for circuits with AC 50Hz frequency, 400V working voltage and current up to 1250A.

The circuit breaker incorporates multiple protection functions including over-voltage protection, under-voltage protection, phase loss protection, overload long-delay inverse time limit, short-circuit short-delay inverse time limit, short-circuit short-delay fixed time limit, short-circuit instantaneous and under-voltage protection. These comprehensive protection features ensure the safety of electrical lines and connected equipment.

The product meets GB14048.2 standards and features a highly integrated industrial grade circuit board with advanced lightning protection design. The compact structure makes it ideal for installations with limited space requirements. The neat circuit board layout simplifies wiring with only necessary signal input connections required.

The breaker's housing is constructed from flame-retardant, high-temperature resistant materials. The dynamic and static contacts use silver-plated copper alloy for excellent conductivity and arc resistance. Each unit undergoes rigorous testing including instantaneous and delayed operation tests to ensure quality and reliability.