Photovoltaic High-Voltage Molded Case Circuit Breaker

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  • CXB6 Miniature Circuit Breaker (MCB) with Leakage Protection Option Quick View
    CXB6 Miniature Circuit Breaker (MCB) with Leakage Protection Option
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    CXB6 Miniature Circuit Breaker (MCB) with Leakage Protection Option

    CXB6 Miniature Circuit Breaker (MCB) with Leakage Protection Option

    The CNXE CXB8 series (including the CXB8LE leakage protection model) of miniature circuit breakers are the core of "safety dual protection" for household and commercial low-voltage circuits. They cover two versions: the basic model focuses on overload and short-circuit protection, while the leakage model adds an leakage monitoring function to quickly cut off the leakage circuit, suitable for high-safety scenarios; it also supports multi-pole specification selection, which can match the phase wire configuration of different circuits such as lighting and sockets, achieving independent protection for single or multiple circuits to avoid local faults affecting the overall power supply.
    It adopts a dedicated dual-decoupling structure, with a slow response during overload and a instantaneous break during short circuit, and is equipped with high-grade breaking capacity to ensure safety. The leakage model can also accurately identify tiny leakage signals. The high flame-retardant housing + anti-misoperation terminals reduce risks, have strong durability for long-term operation, and come with a status indicator light to make the circuit status clear at a glance. Moreover, it is compatible with universal rails for tool-free installation, supports connections of multiple specifications of cables, and enables efficient and effortless construction and debugging.
    This product is suitable for different circuit areas in households, commercial branch lighting, and office equipment protection. It is an "all-round protection choice" for low-voltage circuits, providing dual versions, multi-pole compatibility, and dual-dimensional protection, taking into account both basic and leakage safety needs, and offering high compatibility and reliability of power supply for households and businesses.

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  • CXB8LE/CXB10LE Miniature Circuit Breaker for Home and Commercial Safety Use Quick View
    CXB8LE/CXB10LE Miniature Circuit Breaker for Home and Commercial Safety Use
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    CXB8LE/CXB10LE Miniature Circuit Breaker for Home and Commercial Safety Use

    CXB8LE/CXB10LE Miniature Circuit Breaker for Home and Commercial Safety Use

    The leakage protection circuit breaker is a "leakage protection device" specifically designed for households and commercial environments with high humidity or high-risk electricity usage. It integrates overload / short-circuit protection and leakage protection, meeting the high safety requirements of different circuits: In addition to basic protection, it adds an accurate leakage monitoring function, which can quickly cut off minor leakage circuits, eliminating the risk of electric shock at the source, suitable for damp and high-risk scenarios such as those with many people. At the same time, it offers multiple pole and multiple current specifications for selection, capable of matching the loads and phase line configurations of different circuits, achieving independent protection for single or multiple paths to prevent the spread of faults.
    This product is equipped with a monthly test button to regularly verify the leakage function. Its high flame-retardant casing and anti-misoperation terminals reduce risks, and it comes with a clear status indicator to clearly display the circuit status. It also supports universal rails for tool-free installation, supports connections of multiple specifications of cables, and is compatible with most distribution box layouts, making maintenance efficient and effortless.
    It is suitable for damp areas in households, commercial kitchen equipment, office public sockets, etc., and is a "necessary safety product" for high-risk electricity usage scenarios. With dual protection, multi-specification compatibility, and detailed safety design, it builds an electricity safety defense line for household and commercial users.

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  • DZ47-125 C63 4P Circuit Breaker 400V 63A Air Switch Quick View
    DZ47-125 C63 4P Circuit Breaker 400V 63A Air Switch
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    DZ47-125 C63 4P Circuit Breaker 400V 63A Air Switch

    DZ47-125 C63 4P Circuit Breaker 400V 63A Air Switch

    A 4-pole (4P) circuit breaker from Chengxi Electric's DZ47-125 series, with a rated current of 63A (Type C tripping curve) and compatible with 400V electrical systems. It features a breaking capacity of 7.5kA, complies with GB/T 14048.2 standards and EC008472 certification. Ideal for overload and short-circuit protection in residential and commercial power distribution systems, it comes with an easy-to-operate ON/OFF toggle switch and fits standard distribution boxes.
    The DZ47-125 C63 4P Circuit Breaker from Chengxi Electric is designed to provide dependable overload and short-circuit protection for low-voltage power distribution systems. Suitable for both residential and commercial applications, it supports stable operation in 400V electrical systems where safety and reliability are essential.

    Featuring a 4-pole (4P) configuration and a Type C tripping curve, this circuit breaker responds effectively to moderate inrush currents while maintaining consistent protection during normal operation. The rated current of 63A makes it well-suited for common distribution requirements, helping users manage power flow with confidence across everyday electrical installations.

    The breaker is built to comply with GB/T 14048.2 standards and holds EC008472 certification, reflecting its adherence to recognized safety and performance requirements. With a breaking capacity of 7.5kA, it is capable of handling typical fault conditions in residential and light commercial environments.

    Designed for practical use, the DZ47-125 series features a clear ON/OFF toggle switch that allows easy operation and quick status recognition. Its compact structure fits standard distribution boxes, enabling straightforward installation in new projects or system upgrades. The DZ47-125 C63 4P circuit breaker offers a reliable and user-friendly solution for modern power distribution needs.

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Miniature circuit breakers serve as essential protective components in low-voltage terminal distribution systems. The DZ47, DZ30, and related product series are renowned for their compact size and high reliability. They are suitable for branch circuits with AC 50/60Hz, rated voltage up to 400V, and current from 6A to 63A. Widely used in households, small commercial premises, and office buildings, these breakers provide protection against overload and short circuits. Certain models, such as the DZ47LE, also offer residual current (leakage) protection.

The product features are distinct: both the casing and core components are made from high-impact, flame-retardant materials. With a high breaking capacity, they ensure rapid disconnection of circuits during faults. Their compact design allows for easy installation and compatibility with standard DIN rails, supporting flexible combinations. The CHB1YF series of miniature auto recloser circuit breakers is specially designed for photovoltaic (PV) applications, supporting automatic reclosing to enhance system reliability.

Meticulous attention is given to detail during production, ensuring compliance with international safety standards. The breakers are suitable for environments ranging from -5°C to 40°C and offer excellent protection performance. As the “safety guardians” of terminal distribution, their high cost-performance ratio and ease of maintenance make them highly favored by residential and small industrial users.

Chengxi Electric Group Co., Ltd.

Chengxi Electric Group Co., Ltd.

Chengxi Electric Group Co., Ltd. is a China Miniature Circuit Breaker (MCB) Manufacturer and Sale Miniature Circuit Breaker (MCB) Factory . Equipped with modern industrial factory buildings and office facilities, we specialize in the production and operation of circuit breakers, dual power supplies (ATS), AC contactors, and other modern low-voltage electrical products. The company implements a complete and scientific quality management system. Through good faith and strong technical capabilities, our products have earned widespread recognition in the industry. ChengXi Electric adheres to a management philosophy of "Integrity, Pragmatism, Science, Rigor, and Solidarity," always focusing on customer needs and dedicated to the field of low-voltage electrical equipment. Relying on the power system and driven by market demands, ChengXi Electric has provided high-quality products and services to a diverse range of users over the years. We continue to expand our market presence, and our products are widely used in numerous domestic sectors, including electric power systems, nuclear power, national defense, petrochemicals, metallurgy, coal, railways, and more. They play a vital role in many national key projects, winning the trust of a growing number of customers and achieving an excellent reputation within the industry.

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Industry Knowledge Extension

What is a Miniature Circuit Breaker and how does it work?

A Miniature Circuit Breaker (MCB) replaces traditional fuses, offering greater reliability and convenience since it can be reset manually after tripping. Inside the MCB, a bimetallic strip provides overload protection by bending under excessive heat, while a magnetic coil reacts instantly to short circuits by generating a magnetic field that separates the contacts. These two mechanisms ensure precise and fast interruption of current flow, preventing damage to cables, equipment, and connected devices.

Where are Miniature Circuit Breakers commonly used?

MCBs are widely used in residential, commercial, and light industrial installations. They serve as the primary protection for lighting systems, outlets, and small appliances. In offices and homes, MCBs help maintain safety by preventing wire overheating or electrical fires caused by faulty devices. In addition, modular MCBs can be mounted on distribution boards and combined with other protective units like residual current devices for enhanced safety.

What are the key benefits of using Miniature Circuit Breakers?

MCBs offer high reliability, quick response, and easy operation. They can be reset without replacement, reducing downtime and maintenance costs. Their compact design allows for simple installation and integration into various control panels. Additionally, many MCBs come with standardized current ratings and trip curves, making them suitable for different load conditions. The miniature circuit breaker provides a durable and user-friendly solution for protecting low-voltage electrical systems.

What Are the Advantages of a Photovoltaic High-Voltage Molded Case Circuit Breaker?

Designed for Solar Power Systems

Traditional circuit breakers are often inadequate for handling the unique electrical characteristics of photovoltaic installations, such as high-voltage direct current and fluctuating loads. Photovoltaic High-Voltage Molded Case Circuit Breaker provide reliable protection against overcurrent, reverse current, and short circuits, ensuring the safety and stability of solar energy equipment.

High Breaking Capacity and Thermal Stability

Photovoltaic High-Voltage Molded Case Circuit Breaker are capable of safely interrupting large fault currents that may occur within photovoltaic strings or inverter connections. The breaker’s contacts and arc-extinguishing chambers are designed to manage high-energy DC arcs effectively. In addition, these devices exhibit thermal stability, maintaining consistent performance even under prolonged exposure to high temperatures or continuous current flow—a common condition in solar installations.

Durability and System Efficiency

The molded case enclosure protects internal components from dust, moisture, and UV exposure, extending the breaker’s service life. Many PV MCCBs also feature adjustable trip settings, allowing installers to fine-tune protection according to system requirements. They help improve energy efficiency by unnecessary tripping and power loss. In large-scale solar farms and rooftop systems, PV high-voltage molded case circuit breakers contribute to stable operation, reduced maintenance needs, and greater long-term reliability.

What Precautions Should Be Taken When Installing a Small Leakage Circuit Breaker?

The Role of a Small Leakage Circuit Breaker

A Small Leakage Circuit Breaker (SLCB), often referred to as a Residual Current Circuit Breaker (RCCB), is designed to protect people from electric shock and prevent electrical fires caused by current leakage. It detects the difference between the current flowing through live and neutral wires. If the imbalance exceeds a safe threshold, the breaker trips instantly, cutting off power supply. To ensure its effectiveness, correct installation is essential.

Key Installation Precautions

Before installation, it is important to confirm the rated current, voltage, and sensitivity of the leakage circuit breaker to match the load requirements. The wiring must be carried out according to the manufacturer’s diagram, ensuring that the live and neutral wires pass through the correct terminals. Reversing connections or omitting the neutral line can false tripping or failure to operate. The circuit breaker should be installed in a dry, well-ventilated environment, away from moisture, dust, or corrosive gases that might affect insulation performance.

Testing and Safety Measures

After installation, the SLCB should undergo functional testing using the built-in test button to verify its operation. Regular inspection is also recommended to ensure reliability. Grounding is a critical precaution—proper earthing guarantees that leakage current is safely discharged instead of passing through the human body. Additionally, avoid connecting neutral wires from different circuits to the same leakage breaker, as this can cause malfunction. Taking these precautions ensures that a small leakage circuit breaker operates accurately, providing consistent electrical safety in homes and workplaces.