3P 500A Type Molded Case Circuit Breaker

In industrial plants, large facilities, or regional distribution centers, a current level of 500A typically means carrying the power lifeline of the entire site or critical areas. The SPX durable 3P 500A Type Molded Case Circuit Breaker (also known as the "air circuit breaker") is the central level equipment deployed in this critical location. It goes beyond the concept of conventional circuit breakers and is a power control and protection platform that integrates precision measurement, intelligent logic judgment, powerful breaking capability, and network communication. Its "framework style" structure not only provides a solid mechanical foundation, but also represents its industrial grade attributes of modular design, expandable functionality, and easy maintenance. It is the core hardware for building a safe, stable, and intelligent distribution backbone network.

Feature

Adopting a high-strength insulation frame structure, it can bear the huge electric stress under high current and provide modular internal space for installing different levels of trip units and accessories.
The 3P 500A Type Molded Case Circuit Breaker has a maximum short-circuit breaking capacity of up to 85kA, 100kA, or even higher, which can safely clear the most serious short-circuit faults from the superior power grid or transformer near the end, ensuring the integrity of the entire low-voltage distribution system.
Equipped with high-performance electronic release as standard, it provides four stage fully selective protection for long delay, short delay, instantaneous and ground faults. All protection parameters can be finely adjusted within a wide range through the panel or software, achieving perfect coordination with the upper and lower levels of the system, ensuring selective tripping in case of faults.
Integrated load monitoring, thermal memory, phase imbalance protection, neutral line protection and other advanced functions provide comprehensive protection beyond traditional overload and short circuit protection.
Flexible selection of various auxiliary contacts, alarm contacts, shunt/undervoltage release devices, manual/electric operating mechanisms, cabinet door operating handles, etc. The 3P 500A Type Molded Case Circuit Breaker meets the design requirements of complex control cabinets.
Native support or expandable communication function through modules, real-time transmission of three-phase full power data (current, voltage, power, energy, harmonics, etc.) and device status, seamless integration into energy management systems or intelligent distribution monitoring platforms, achieving predictive maintenance and energy efficiency analysis.

Typical application scenarios

As the incoming line or bus tie circuit breaker of the low-voltage main distribution cabinet in the workshop or factory, it protects the low-voltage side outgoing line of the transformer.
High quality 3P 500A Type Molded Case Circuit Breaker is used for low-voltage main incoming lines or important area distribution lines in hospitals, data centers, airports, and large commercial complexes.
Provide main power protection and control for large central air conditioning units, mining crushers, large rolling mills, pump station groups, etc.

The SPX SM30-630 series of MCCB Molded Case Circuit Breaker Parameter

Operating characteristics

MCCB Molded Case Circuit Breaker Front view

Production process