The molded case circuit breaker (MCCB) features overload, short circuit, and undervoltage protection functions to safeguard electrical lines and power equipment against damage.
They are classified into four distinct types based on their rated ultimate short-circuit breaking capacity: C (economic type), L (standard type), M (medium breaking type), and H (high breaking type).
These MCCBs meet the testing requirements of GB/T2423 and IEC60947 standards, meaning they can effectively withstand humid air, salt mist, oil mist, and mold environments.
The 4-pole ARXM3-125~630 MCCB (A/B circuit breaker type) features a unique "overload alarm without tripping" function, ensuring uninterrupted power supply in compliance with GB50054 Article 6.3.6.
It is designed to withstand mechanical vibrations at frequencies of 2Hz to 13.2Hz with a displacement of ±1mm, and frequencies of 13.2Hz to 100Hz with an acceleration of ±0.7g.