OEM Insulated Case Circuit Breaker

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  • DZ47 Series High Breaking Small Leakage Circuit Breaker Quick View
    DZ47 Series High Breaking Small Leakage Circuit Breaker
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    DZ47 Series High Breaking Small Leakage Circuit Breaker

    DZ47 Series High Breaking Small Leakage Circuit Breaker

    The DZ47-63 series miniature circuit breakers feature a comprehensive structure, reliable performance, high breaking capacity, and an attractive and compact appearance. The housing and main components are constructed of impact-resistant, highly flame-retardant materials.

    Applications and Features
    The DZ47-63 standard miniature circuit breaker is suitable for controlling and isolating low-voltage terminal power distribution in residential, industrial, and construction applications, providing overload and short-circuit protection for low-voltage terminal distribution lines and electrical equipment. It can also be used for infrequent switching operations.

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  • DZ47Z Series DC High Breaking Small Leakage Circuit Breaker Quick View
    DZ47Z Series DC High Breaking Small Leakage Circuit Breaker
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    DZ47Z Series DC High Breaking Small Leakage Circuit Breaker

    DZ47Z Series DC High Breaking Small Leakage Circuit Breaker

    Product Description:
    The DZ47Z series DC miniature circuit breakers are designed specifically for DC circuits. They feature a comprehensive structure, reliable performance, high breaking capacity, and an attractive and compact appearance. The housing and main components are constructed of impact-resistant, highly flame-retardant materials.

    Applications and Features:
    The DZ47Z series DC miniature circuit breakers are suitable for controlling and isolating DC terminal distribution circuits in solar photovoltaic systems, energy storage systems, communication base stations, DC microgrids, rail transit, and electric vehicle charging facilities. They also provide overload and short-circuit protection for DC terminal distribution lines and electrical equipment. They can also be used for infrequent switching operations.

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  • CHB1YF Series Photovoltaic Small Reclosing Circuit Breaker Quick View
    CHB1YF Series Photovoltaic Small Reclosing Circuit Breaker
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    CHB1YF Series Photovoltaic Small Reclosing Circuit Breaker

    CHB1YF Series Photovoltaic Small Reclosing Circuit Breaker

    The CHB1YF series photovoltaic miniature reclosing circuit breaker is a protective device designed specifically for photovoltaic power generation systems. It offers high reliability and stability, effectively protecting photovoltaic panels and the system.

    Utilizing advanced reclosing technology, this circuit breaker rapidly disconnects power when a short circuit or overload is detected and automatically restores power after the fault is resolved, minimizing system downtime.

    Its compact design makes it easy to install in various photovoltaic systems, and it offers both manual and automatic operation modes, allowing users to choose according to their needs.

    The CHB1YF series circuit breaker also features excellent weather resistance and anti-interference capabilities, making it suitable for a variety of harsh environmental conditions. It is an indispensable safety device for photovoltaic power generation systems.

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  • DZ30-32/DZ30LE-32 (DPN) Series Small Leakage Circuit Breakers Provide Personal Protection Quick View
    DZ30-32/DZ30LE-32 (DPN) Series Small Leakage Circuit Breakers Provide Personal Protection
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    DZ30-32/DZ30LE-32 (DPN) Series Small Leakage Circuit Breakers Provide Personal Protection

    DZ30-32/DZ30LE-32 (DPN) Series Small Leakage Circuit Breakers Provide Personal Protection

    The DZ30-32/DZ30LE-32 (DPN) series of small leakage circuit breakers provide effective personal safety protection for low-voltage terminal power distribution in residential, industrial, construction and other fields through leakage protection function.

    Applications and Features: Suitable for low-voltage terminal distribution in residential, industrial, and construction applications, it provides overload, short-circuit, isolation, and leakage protection. It can simultaneously disconnect both the phase and neutral wires, protecting electrical equipment from insulation failures and providing personal protection against indirect contact and supplementary protection against direct contact.

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  • DZ47LE Small Size Small Leakage Circuit Breaker Grounding Fault Protection Device Quick View
    DZ47LE Small Size Small Leakage Circuit Breaker Grounding Fault Protection Device
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    DZ47LE Small Size Small Leakage Circuit Breaker Grounding Fault Protection Device

    DZ47LE Small Size Small Leakage Circuit Breaker Grounding Fault Protection Device

    The DZ47LE series leakage circuit breakers feature a comprehensive structure, reliable performance, high breaking capacity, and an attractive and compact appearance. The housing and main components are constructed of impact-resistant, highly flame-retardant materials. They are suitable for applications operating at 50Hz or 60Hz AC, with a rated operating voltage of 400V and below, and a rated current of 6A to 63A.

    Applications and Features
    The DZ47LE-63 standard miniature leakage circuit breaker is a ground fault protection device with a wide range of applications. It offers various operating levels, such as 30mA and 50mA, to meet diverse protection needs. The use of a fog-sequence current transformer and integrated amplifier circuit ensures high sensitivity, enabling detection of ground fault currents, significantly reducing the risk of fire and electric shock. The DZ47LE-63 standard miniature leakage circuit breaker provides:
    Provides personal protection against indirect contact
    Provides supplementary personal protection against direct contact
    Provides protection against insulation failures in electrical equipment

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  • DZ47 Series Miniature Circuit Breaker Accessories For Low Voltage Terminal Distribution Quick View
    DZ47 Series Miniature Circuit Breaker Accessories For Low Voltage Terminal Distribution
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    DZ47 Series Miniature Circuit Breaker Accessories For Low Voltage Terminal Distribution

    DZ47 Series Miniature Circuit Breaker Accessories For Low Voltage Terminal Distribution

    DZ47 series miniature circuit breaker accessories are suitable for low-voltage terminal distribution systems to ensure circuit safety, prevent overload and short circuit, and achieve effective circuit control and protection.

    Applications and Features
    Suitable for low-voltage terminal distribution in residential, industrial, and construction applications. It provides overload, short-circuit protection and control, and isolation. It can simultaneously disconnect both the phase and neutral lines, but does not protect the neutral line.

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  • CHQ3-63/CHQ1/CHQ1Y Series Dual Power Automatic Transfer Switch (CB Class) With Built-In Circuit Breaker Quick View
    CHQ3-63/CHQ1/CHQ1Y Series Dual Power Automatic Transfer Switch (CB Class) With Built-In Circuit Breaker
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    CHQ3-63/CHQ1/CHQ1Y Series Dual Power Automatic Transfer Switch (CB Class) With Built-In Circuit Breaker

    CHQ3-63/CHQ1/CHQ1Y Series Dual Power Automatic Transfer Switch (CB Class) With Built-In Circuit Breaker

    The CHQ3-63/CHQ1/CHQ1Y series dual-source automatic transfer switches (CB class) feature integrated circuit breakers, providing comprehensive circuit protection.

    With their compact design and easy installation, they are suitable for a variety of industrial and commercial environments. The automatic transfer function ensures seamless transfer to the backup power source in the event of a primary power failure, ensuring power continuity.

    These products offer high reliability and a long service life, reducing maintenance costs. Their modular design facilitates expansion and upgrades to meet diverse user needs. The CHQ series switches are an ideal choice for enhancing power system safety and stability.

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  • CHQ2 Series Dual Power Automatic Transfer Switch (PC Class) Focuses On Transfer Performance Quick View
    CHQ2 Series Dual Power Automatic Transfer Switch (PC Class) Focuses On Transfer Performance
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    CHQ2 Series Dual Power Automatic Transfer Switch (PC Class) Focuses On Transfer Performance

    CHQ2 Series Dual Power Automatic Transfer Switch (PC Class) Focuses On Transfer Performance

    The CHQ2 series dual-power automatic transfer switch (PC class) is an electrical device designed to improve switching performance and enhance short-circuit current withstand capability.

    Offering high reliability and stability, it automatically switches to a backup power source in the event of a primary power failure, ensuring power continuity and safety. Its compact design and easy installation make it suitable for a variety of industrial and commercial environments. The CHQ2 series offers both manual and automatic operation modes, allowing users to choose the right one based on their specific needs.

    Our PC-grade dual-power automatic transfer switch complies with multiple international standards, ensuring its wide applicability and excellent performance in diverse application scenarios.

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  • HD/HS Series Knife Switches Are Used For Circuit Isolation And Infrequent Operation Quick View
    HD/HS Series Knife Switches Are Used For Circuit Isolation And Infrequent Operation
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    HD/HS Series Knife Switches Are Used For Circuit Isolation And Infrequent Operation

    HD/HS Series Knife Switches Are Used For Circuit Isolation And Infrequent Operation

    The HD and HS series knife switches (hereinafter referred to as switches) are suitable for use in power distribution systems operating at 50 Hz, with a rated operating voltage up to 690 V and a rated operating current up to 3000 A. They are used for infrequent manual circuit connection and disconnection, or as disconnectors.

    The HD and HS series knife switches offer a compact design and flexible mounting options, allowing for vertical or horizontal installation, facilitating optimized layout within distribution cabinets. The blades maintain close contact, ensuring excellent conductivity and minimizing energy loss.

    These switches offer excellent mechanical strength and thermal stability, making them suitable for industrial, commercial, and building power distribution systems, effectively enhancing the safety and reliability of electrical systems.

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  • HR3/HR3BX Series Fuse-Type Knife Switches Are Used In Complete Power Distribution Equipment Quick View
    HR3/HR3BX Series Fuse-Type Knife Switches Are Used In Complete Power Distribution Equipment
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    HR3/HR3BX Series Fuse-Type Knife Switches Are Used In Complete Power Distribution Equipment

    HR3/HR3BX Series Fuse-Type Knife Switches Are Used In Complete Power Distribution Equipment

    The HR3/HR3BX series fuse-type knife switches are electrical devices that combine the functions of a fuse and a knife switch, primarily used in power distribution systems. They provide overload and short-circuit protection while allowing manual operation to connect and disconnect the circuit.

    Key Features
    - Fuse Protection: A built-in fuse automatically disconnects the circuit when the current exceeds the rated value, protecting it from overload and short-circuit damage.
    - Knife Switch Operation: Manual operation of the knife switch allows for convenient connection and disconnection, making it suitable for applications requiring frequent operation.
    - Applications for Power Distribution Systems: Designed for use in power distribution systems, they can be used in conjunction with other electrical components to form a complete power distribution system.
    - High Reliability: Compact design, reliable operation, and stable operation in a variety of environments.

    Application Scenarios
    - Industrial Power Distribution Systems: Used to control and protect equipment such as motors and transformers in industrial environments such as factories and workshops.
    - Commercial Building Power Distribution: Used in commercial buildings like shopping malls and office buildings to control electrical equipment such as lighting and air conditioning.
    - Residential Power Distribution: Used in residential communities to control household electrical appliances and provide safety protection.

    The HH15 series offers high thermal and dynamic stability, and its housing is constructed of flame-retardant material to effectively prevent fire hazards. The operating handle features an interlock function to prevent accidental operation and ensure safety.

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  • HH15 (QSA) / QP / QA Series Disconnect Switch Fuse Group For Main Switch Quick View
    HH15 (QSA) / QP / QA Series Disconnect Switch Fuse Group For Main Switch
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    HH15 (QSA) / QP / QA Series Disconnect Switch Fuse Group For Main Switch

    HH15 (QSA) / QP / QA Series Disconnect Switch Fuse Group For Main Switch

    Primarily used as a manual, unattended main switch or master switch in power distribution circuits with high short-circuit currents and low power factors.

    The HH15(QSA)/QP/QA series disconnectors integrate isolation, control, and protection functions, effectively isolating power and enabling safe maintenance. Built-in high-performance fuses provide reliable current limiting, effectively reducing the impact of short-circuit currents on equipment.

    The compact design features a double- or multi-break contact system with wide contact spacing, ensuring standard clearance and creepage distances, enhancing electrical safety. A clear disconnect position indicator helps maintenance personnel confirm the isolation status.

    Flexible mounting options allow for front- or rear-panel installation to meet the requirements of various cabinet structures. Suitable for power isolation and short-circuit protection in industrial and mining enterprises, building power plants, commercial buildings, and various types of complete power distribution equipment.

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  • HR5/HR6 Series Fuse-Type Isolating Switches for Power Supply and Distribution Circuits Quick View
    HR5/HR6 Series Fuse-Type Isolating Switches for Power Supply and Distribution Circuits
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    HR5/HR6 Series Fuse-Type Isolating Switches for Power Supply and Distribution Circuits

    HR5/HR6 Series Fuse-Type Isolating Switches for Power Supply and Distribution Circuits

    The HR5/HR6 series power supply and distribution circuit fused disconnect switches are protective devices designed specifically for electrical equipment and are widely used in various industrial and commercial environments. Their primary purpose is to ensure the safe operation of electrical circuits by quickly disconnecting power in the event of a short circuit or overload, thereby preventing equipment damage and fire risks.

    Features of these disconnect switches include:

    1. High Reliability: Utilizing high-quality materials and advanced manufacturing processes, they ensure stable operation in a variety of environments.

    2. Fast Response: A fast-acting fuse mechanism rapidly disconnects the circuit in the event of abnormal current flow, minimizing damage to equipment.

    3. Easy Installation and Maintenance: The compact design allows for easy installation and facilitates routine inspection and maintenance, reducing maintenance costs.

    4. Versatility: Suitable for a variety of voltage and current levels, they meet the needs of diverse electrical systems.

    5. Safety: Compliant with international safety standards, they provide reliable protection even under extreme conditions.

    Our HR5/HR6 series fuse disconnect switches are indispensable safety components in electrical systems. Their efficient and reliable performance makes them an ideal choice for protecting the safety of electrical equipment and personnel.

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Chengxi Electric Group Co., Ltd.

Chengxi Electric Group Co., Ltd.

Chengxi Electric Group Co., Ltd. is a Intelligent Universal Circuit Breaker Manufacturer and OEM Insulated Case Circuit Breaker Supplier . 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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    ATTESTATION OF CONFORMITY
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    ATTESTATION OF CONFORMITY
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    Business license
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    Group standard drafting unit
  • AAA-rated credit enterprise
    AAA-rated credit enterprise
  • Wenzhou Enterprise Technology Research and Development Center
    Wenzhou Enterprise Technology Research and Development Center
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    Star Enterprise
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    High-tech enterprises

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Industry Knowledge Extension

What Circuit Problems Can the Intelligent Universal Circuit Breaker Solve?

Addressing Overload and Short-Circuit Conditions

By continuously monitoring current flow, it detects when electrical demand exceeds safe limits. Instead of relying solely on thermal or magnetic triggers, the intelligent breaker uses microprocessor-based algorithms to analyze data and respond more accurately. In addition, it protects against short circuits—sudden high-current faults that can damage equipment or cause fires. The intelligent system reacts quickly, downtime and preventing damage to wiring and connected devices.

Managing Power Quality and System Communication

Voltage fluctuations, harmonics, and imbalance between phases can reduced equipment lifespan. The intelligent circuit breaker monitors these parameters and communicates data to control systems for corrective actions. Its communication interface—often integrated with smart building systems—enables remote monitoring and diagnostics. This allows maintenance personnel to identify and address potential problems before they escalate. Overall, the IUCB enhances energy management, safety, and operational reliability, making it a vital component in modern electrical infrastructures.

What Is the Main Function of an Insulated Case Circuit Breaker?

Designed for High-Capacity Electrical Protection

An Insulated Case Circuit Breaker (ICCB) serves as a protective device for medium and large-scale electrical installations. Its main function is to safeguard electrical circuits from overloads, short circuits, and equipment failures. Unlike smaller molded case breakers, the ICCB is built to handle higher current ratings, typically ranging from 400A to several thousand amperes. The “insulated case” design refers to the structure that separates live components, providing extra protection and ensuring reliable operation even in harsh environments.

Comprehensive Overcurrent and Fault Interruption

The ICCB operates by automatically disconnecting the circuit when abnormal conditions occur. It employs both thermal and magnetic trip elements to detect different fault types. For instance, a sustained overload causes heat buildup, which triggers the thermal element, while an instantaneous short circuit activates the magnetic release. These combined mechanisms protect electrical distribution systems from damage, preventing hazards such as insulation failure, equipment burnout, or electrical fires.

Flexibility and Integration with Modern Systems

A key advantage of insulated case breakers is their customization and modular design. Many models come with adjustable trip settings and digital protection relays, allowing engineers to tailor performance to specific applications. They can also integrate with building automation systems, providing feedback on power consumption and breaker status. This intelligent coordination reduces unnecessary tripping and enhances continuity of service. Ultimately, the main function of an insulated case circuit breaker is not just protection—it also contributes to improved energy efficiency and system reliability across industrial and commercial facilities.

What Are the Common Types of Safety Circuit Breakers?

Protecting Homes and Businesses from Electrical Risks

Safety circuit breakers are essential devices used to prevent electrical accidents and equipment damage. Their role is to interrupt current flow when faults occur, thereby safeguarding people and property. There are several common types, each designed to handle specific protection needs and electrical environments.

Miniature Circuit Breaker (MCB)

The Miniature Circuit Breaker is one of the widely used safety breakers. It is designed for low-voltage applications, typically found in residential and small commercial systems. The MCB protects against overloads and short circuits, automatically cutting off the current when safe limits are exceeded. It is compact, reliable, and easy to reset, making it an ideal replacement for traditional fuses.

Residual Current Circuit Breaker (RCCB)

Another important type is the Residual Current Circuit Breaker, which focuses on protecting people from electric shock. It detects differences between live and neutral current flow, indicating leakage through unintended paths, such as a person’s body or faulty insulation. When such a fault is detected, the RCCB disconnects the power almost instantly, injury risks and preventing electrical fires caused by leakage currents.

Molded Case Circuit Breaker (MCCB)

For larger electrical systems, the Molded Case Circuit Breaker provides higher current ratings and adjustable protection settings. It combines overload, short-circuit, and earth fault protection in a single device. MCCBs are used in commercial and industrial installations where more precise control and durability are required.

Air and Earth Leakage Circuit Breakers

In addition to MCBs and RCCBs, Air Circuit Breakers (ACBs) are used for high-capacity protection in power distribution systems, while Earth Leakage Circuit Breakers (ELCBs) detect and interrupt current leakage to the ground. Both types enhance safety in complex electrical environments.

Ensuring a Safe Electrical Network

Selecting the right safety circuit breaker depends on the voltage level, load capacity, and safety requirements of a system. Whether in homes, offices, or factories, these breakers play a vital role in ensuring uninterrupted, hazard-free electrical operation.