Moulded Case Circuit Breaker Manufacturer

Product Features

Suitable for common AC power distribution voltage environments, and can be flexibly applied to three-phase circuits with different voltage requirements. The circuit breaker's ability to withstand impulse voltages such as lightning strikes ensures equipment safety under transient high-voltage interference. In the event of a short-circuit fault, it can safely interrupt the maximum short-circuit current, effectively disconnecting the faulty circuit and protecting system equipment. It adopts a molded case structure, possessing good insulation performance and mechanical strength. Easy to operate, the "ON" indicator clearly shows the closed circuit state. It can effectively handle overload and short-circuit faults in power distribution lines, quickly disconnecting the circuit and protecting downstream electrical equipment. Widely used in low-voltage power distribution systems in industrial plants, commercial buildings, and other places, providing reliable protection for electrical safety and stable system operation.

Product Competitive Advantages
“Strong Interruption” Safety Guarantee: 35kA ultimate breaking capacity, capable of quickly interrupting strong short-circuit currents (such as equipment short circuits and line faults), preventing the fault from spreading to the entire power distribution system and protecting core equipment such as distribution cabinets and cables.
Intelligent Protection Logic: Integrated overload protection (10In tripping characteristic) + short-circuit protection, real-time monitoring of current anomalies:
Slow tripping during overload to avoid false tripping;
Instantaneous tripping during short circuit to cut off dangerous current.
Durable Molded Case Design: The casing uses high-strength insulating material, offering:
Excellent insulation: preventing leakage and creepage;
Mechanical strength: impact resistance and dustproof, suitable for complex power distribution environments (such as factory workshops and basements).
Typical Application Scenarios
Industrial field: Factory power distribution trunk lines, motor control circuits (such as fans and pumps), power supply protection for automated production lines;
Commercial buildings: Distribution boxes, central air conditioning, elevators and other large load power distribution in shopping malls and office buildings;
Infrastructure: Low-voltage power distribution systems in data centers and communication rooms, ensuring the power supply safety of core equipment such as servers and switches.

The CNXE CHM9-250L/3300 molded case circuit breaker, with its core features of 250A high current capacity and 35kA high breaking capacity, combined with reliable protection and durable design, provides a dual guarantee of “safe interruption + stable operation” for medium and large low-voltage power distribution systems, making it an efficient solution for industrial and commercial power distribution.

1. "Precise Protection" Thermal-Magnetic Trip Technology
During overload, the bimetallic strip slowly heats up and bends, triggering the circuit breaker to trip (sensitivity can be adjusted via Ir);
During a short circuit, the electromagnetic coil instantly engages, cutting off the circuit (Im sets the instantaneous protection threshold), balancing the needs of "preventing false tripping" and "fast disconnection".
2. "Multi-purpose" Multi-voltage Design
A single product covers 220V (household) → 380V (industrial) → 690V (high-voltage equipment), eliminating the need to stock multiple models for different voltages, reducing procurement and inventory costs.

It is compatible with common AC power distribution voltage environments and can be flexibly applied to three-phase circuits with different voltage requirements. The circuit breaker's ability to withstand surge voltages such as lightning strikes ensures equipment safety under instantaneous high-voltage interference. In the event of a short circuit fault, it can safely interrupt the circuit at the maximum short-circuit current value, effectively cutting off the faulty circuit and protecting system equipment. It adopts a molded case structure, possessing excellent insulation performance and mechanical strength. Operation is simple, with a clear "ON" indicator showing the closed circuit state. It can effectively handle overload and short-circuit faults in power distribution lines, quickly disconnecting the circuit and protecting downstream electrical equipment. It is widely used in low-voltage power distribution systems in industrial plants, commercial buildings, and other places, providing reliable protection for electrical safety and system stable operation.

Features: Covers 240V (residential) → 690V (industrial high voltage)
Precise electronic tripping control
Rated current range: 250~630A continuously adjustable (set via Micrologic 2.3 trip unit), suitable for current demands from "medium-load feeders" to "heavy-load busbars".

Electronic trip unit with three-stage protection:
Long delay (Ir): Slow tripping during overload, with adjustable threshold based on load characteristics (e.g., motor starting curve) to avoid false tripping;
Short delay (Isd): Delayed tripping during the initial stage of a short circuit (non-fatal current), prioritizing power supply to critical circuits and reducing the scope of power outages;
Instantaneous (Im): Instantaneous tripping during severe short circuits, quickly isolating faults and protecting equipment safety.
Compared to thermal-magnetic tripping: Electronic tripping offers a more precise protection curve and more flexible threshold adjustment (supporting complex settings such as 0.4~1 times Ir), suitable for special loads such as capacitor compensation cabinets and variable frequency motors.
Standards and Compatibility

International certification: Complies with both IEC/EN 60947-2 (EU/International) and NEMA AB1 (North America) standards, directly meeting the access requirements for multinational projects.
Frequency: 50/60Hz compatible, suitable for domestic and international power grids.

Product Competitive Advantages
1. Electronic tripping technology, self-adaptive to the environment: Automatically compensates for the impact of temperature on protection parameters (e.g., derating at 40℃), ensuring protection accuracy; Fault memory: Records the cause of the most recent trip (overload/short circuit), assisting maintenance personnel in quickly locating problems.

Core Advantages
Precise Protection: The thermal-magnetic circuit breaker supports adjustable overload and short-circuit thresholds, adapting to complex loads such as motor starting and main line power distribution, preventing false trips.
Multi-Voltage Compatibility: A single product covers 240V (residential) to 690V (industrial high voltage), reducing inventory and suitable for export/multinational projects.
Convenient Operation and Maintenance: A transparent window intuitively displays parameters, a TRIP button allows for one-click testing, and input/output terminals are clearly marked (1/3/5 for input, 2/4/6 for output).

Typical Scenarios
Industrial: Motor control (fans, pumps, adjusting Ir to match starting current);
Commercial: Power distribution in shopping malls and data centers (adapting to multi-floor voltage);
Export: Directly meets IEC standards and is compatible with overseas equipment.

Core Advantages:
Precise Electronic Protection: The Micrologic 3.3 trip unit supports three-stage protection: long-time overload, short-time short circuit/instantaneous protection, with flexible threshold adjustment, suitable for complex loads such as motors and capacitor banks.
Wide Voltage and High Current: A single product covers 240V~690V voltage and 800A rated current, meeting the needs of high-load scenarios such as industrial main lines and transformer secondary circuits.
Convenient Operation and Maintenance: A transparent window intuitively displays parameters, fault memory assists in troubleshooting, and a TRIP button allows for one-click testing of the protection function.

Typical Scenarios:
Industrial main power distribution (e.g., 690V motors, heavy equipment power supply);
Main line protection for large data centers and commercial complexes;
International engineering projects and export equipment (compliant with IEC standards, compatible with multiple regional power grids).
The CHM6-800N provides intelligent protection for high-load, complex power distribution systems with its precise electronic tripping control, 800A high current, and multi-voltage adaptability, suitable for industrial, commercial, and international project scenarios.

Core Advantages:
Strong Breaking Capacity: 50kA ultimate breaking capacity, quickly interrupting short-circuit faults and protecting the safety of the power distribution system.
Three-Phase Compatibility: The 3340 structure is compatible with three-phase circuits, with clear wiring terminals (top input, bottom output).
Intuitive Status Indication: Clear "ON/OFF" switching indicators, with a red indicator light for fault warning.
Dual-Mode Protection: Thermal tripping for overload protection and magnetic tripping for rapid short-circuit protection, providing bidirectional protection for lines and equipment;
Maximum Durability: Silver alloy contacts + flame-retardant casing, supporting over ten thousand breaking operations for long-term stable operation;
Flexible Installation: Rail-mounted design compatible with standard electrical cabinets, supporting drawer/fixed installation, adapting to different power distribution layouts.
Applicable Scenarios: Factory power distribution cabinets, commercial building HVAC systems, elevator power circuits, and front-end protection for photovoltaic inverters.
Certification: Complies with international/domestic electrical safety standards such as IEC 60947-2 and GB 14048.2. CE certified.
The CHM1-400L/3340 provides reliable thermal-magnetic protection for three-phase power distribution systems with its 400A high current capacity and 50kA high breaking capacity, suitable for core circuits in industrial and commercial applications.

The CHM1 series 3P plastic case circuit breaker, with a wide current range of 10A-1600A and a breaking capacity of up to 100kA, faces the harsh power challenges. We are not only a provider of standard products, but also your reliable backing, supporting deep customization and matching precise protection solutions for your system.
The CHM1 Series 3P Plastic Case Circuit Breaker is specifically designed to withstand harsh power conditions and demanding industrial environments. Covering a wide current range from 10A to 1600A and offering a breaking capacity of up to 100kA, it provides reliable protection against overloads, short circuits, and electrical faults. More than just a standard product, we position ourselves as your trusted partner, delivering deep customization services to match voltage, current, and breaking capacity requirements precisely. This flexibility ensures your electrical system operates safely and efficiently under even the most challenging conditions.

High-Capacity CE Certified MCCB

The 630A 3P Molded Case Circuit Breaker (MCCB) is CE certified, guaranteeing high-quality performance and adherence to international safety standards. Designed for industrial and commercial power distribution, it provides robust overload and short-circuit protection, ensuring your system’s stability and operational reliability. Combining advanced design with durable construction, this MCCB is ideal for professionals seeking flexible, dependable, and fully customizable electrical protection solutions. Together with the CHM1 series, it forms a comprehensive solution for modern power systems, offering safety, reliability, and performance in one package.

To cope with the complex and ever-changing power environment, the CHM1 series 3P circuit breaker is born to meet the demand. The wide current and breaking capacity (63A-1600A/25-100kA) are just the starting point. We are more willing to be your solution partner, relying on the strength of our factory to customize voltage, current, and breaking capacity for you, and jointly create the ideal power protection configuration.
The CHM1 Series 3P Circuit Breaker is designed to tackle the challenges of complex and ever-changing power environments. With a wide current range of 63A to 1600A and a breaking capacity of 25kA to 100kA, it offers robust protection for industrial and commercial applications. Leveraging our factory’s expertise, we provide customization of voltage, current, and breaking capacity, allowing you to create the ideal power protection configuration tailored to your system’s needs.

Reliable CE Certified MCCB

The 250A 3P Molded Case Circuit Breaker (MCCB) is CE certified, ensuring high-quality, standard-compliant performance. Designed for dependable overload and short-circuit protection, it is perfect for critical power distribution systems. Together, these breakers provide versatile, reliable, and fully customizable solutions, making them the preferred choice for professionals seeking safe and stable electrical protection.

CHM1 series 3P plastic case circuit breaker: designed for harsh working conditions, with a current coverage of 10A to 1600A and a breaking capacity of up to 100kA. We provide deep customization and OEM services, making us your reliable power solution partner.
The CHM1 Series 3P Plastic Case Circuit Breaker is engineered for harsh working environments, covering a wide current range from 10A to 1600A and offering a breaking capacity of up to 100kA. Its robust design ensures reliable protection against overloads and short circuits, while deep customization and OEM services allow tailored solutions to meet your specific power system requirements.

High-Capacity CE Certified MCCB

The 630A 3P Molded Case Circuit Breaker (MCCB) is CE certified, providing guaranteed quality and dependable performance. Ideal for industrial and commercial power distribution, it ensures safe and stable operation under demanding conditions. Both products combine advanced protection technology and durable construction, making them trusted choices for professionals seeking reliable electrical safety solutions.

Professional power core protection: CHW1 series 4P frame circuit breaker. Covering a wide current range of 200A to 6300A, with a maximum breaking capacity of up to 120kA, it can easily meet various demanding distribution and protection requirements. Supporting comprehensive parameter customization is a solid foundation for building a safe and stable power system.

The CHW1 Series 4P Frame Circuit Breaker delivers professional-grade power core protection, supporting a wide current range from 200A to 6300A. With a maximum breaking capacity of up to 120kA, it ensures reliable safety and stability for industrial and commercial power distribution systems. Its comprehensive parameter customization allows tailored protection to meet diverse electrical requirements, making it an ideal choice for critical applications.

High-Performance 3P MCCB

The 250A 3P Molded Case Circuit Breaker (MCCB) is CE certified, offering dependable overload and short-circuit protection. Designed for high-performance operation, it provides long-lasting reliability and ensures safe power management in demanding environments. Both products combine robust construction with advanced protection technology to safeguard your electrical systems efficiently.

CHM1 series 3P molded case circuit breaker. The current covers 10A-1600A, with a breaking capacity of up to 100kA. With excellent performance and flexible parameter customization capabilities, it is an ideal choice for matching harsh working conditions and achieving precise protection.
CHM1 series 3P molded case circuit breaker. The current covers 10A-1600A, with a breaking capacity of up to 100kA. With excellent performance and flexible parameter customization capabilities, it is an ideal choice for matching harsh working conditions and achieving precise protection.
The CHM1 Series 3P Molded Case Circuit Breaker (MCCB) is engineered to deliver reliable protection and optimal performance for industrial, commercial, and utility applications. Covering a wide current range from 10A to 1600A, and with a high breaking capacity of up to 100kA, the CHM1 MCCB ensures robust protection against overloads, short circuits, and electrical faults.

CE-certified and factory-direct, the CHM1 Series MCCB guarantees high quality and fast worldwide delivery. Its modular and compact design allows for flexible installation in various electrical panels, while its customizable parameters make it ideal for harsh working conditions, ensuring precise protection tailored to your specific power system requirements.