In the field of electrical systems, many people often confuse changeover switch and circuit breaker, mistakenly thinking that they are the same type of electrical component with the same function. In fact, although both changeover switch and circuit breaker are important parts of electrical circuits, their core functions, working principles and application scenarios are essentially different. A circuit breaker is a protective electrical device that can automatically cut off the circuit when the circuit has faults such as overcurrent, short circuit or undervoltage, so as to protect electrical equipment and lines from damage. A changeover switch, on the other hand, is a switching device mainly used to realize the safe and reliable switching of loads between two or more power sources, without the automatic protection function of a circuit breaker. What Are MCB Changeover Switches? An MCB (Miniature Circuit Breaker) changeover switch is an automatic electrical switching device that seamlessly transfers power loads between two different power sources. As a professional manufacturer of electrical components, Zhejiang C&J Electrical co., ltd. (referred to as C&J Electrical) has launched the CJT series modular 63A manual changeover switch, which focuses on solving the power switching needs of various scenarios, with excellent performance and high safety, becoming a reliable choice for users in the field of power switching.
Changeover Switch: Core Overview & Essential Difference from Circuit Breaker
To thoroughly answer the question “Is a changeover switch a circuit breaker?”, we first need to clarify the core definition of changeover switch and its essential difference from circuit breaker. A changeover switch is a switching device specially designed for power source switching, which is mainly used to switch the load between the main power source and the standby power source (such as municipal power and generator power, photovoltaic power and municipal power) to ensure the continuous and stable operation of the electrical system when the main power source fails. Its core function is “switching”, not “protection”.
The biggest difference between a changeover switch and a circuit breaker lies in whether they have automatic fault protection capabilities. A circuit breaker can monitor the circuit current in real time. When an overcurrent, short circuit or other fault occurs, it can automatically trip to cut off the circuit, preventing the fault from expanding and protecting the equipment and lines. In contrast, a changeover switch does not have this automatic protection function. It only undertakes the task of switching power sources and needs to be used with protective devices such as fuses or circuit breakers in the circuit to achieve comprehensive electrical protection. In addition, the changeover switch can be divided into manual type and automatic type according to the operation mode, while the circuit breaker is mainly divided into miniature circuit breaker (MCB), molded case circuit breaker (MCCB) and other types according to the structure and specification.
C&J Electrical’s CJT series changeover switch is a manual type modular product, which is developed to expand the current range of modular changeover switch to 63A. It perfectly fits the DIN rail installation needs of users and meets the safety requirements of various ordinary application scenarios, filling the gap of modular high-current manual changeover switch in the market.
Core Functions of C&J Electrical CJT Series Changeover Switch
As a high-performance manual changeover switch, the CJT series of C&J Electrical not only undertakes the core function of power source switching, but also has a variety of humanized design functions, which are closely combined with user needs to ensure safe, convenient and stable use. Its core functions are as follows:
- Stable dual power switching function: The core function of the CJT series changeover switch is to realize the manual switching between two power sources (main power and standby power). The product adopts a reliable contact structure, with small contact resistance and stable switching, which can effectively avoid arcing during the switching process, ensuring the safety of the switching process and the stability of the load power supply.
- Clear operation and error prevention: Also known as dual power manual changeover switch, it adopts an integrated design and a widened arc handle. The direction of the handle clearly indicates the power supply status: handle I points to the main power supply, and handle II points to the standby power supply. The switching of the main/standby power supply is clear at a glance, which can effectively avoid misoperation caused by unclear operation instructions, and improve the safety of operation.
- Customizable use notes: The product is equipped with a transparent window, which allows users to manually note the different uses of each changeover switch (such as “office area power switching”, “equipment backup power switching”, etc.), facilitating the management and maintenance of electrical systems, especially in scenarios with multiple changeover switch installations.
- Circuit connection and load bearing: In addition to power switching, the CJT series changeover switch can also complete the connection and load bearing of the circuit under normal working conditions, with a thermal current of 63A at 40°C, which can meet the use needs of most medium-power loads and reduce the need for additional electrical components.
- Strong environmental adaptability: The product has a wide working and storage temperature range, which can work stably in the environment of -20°C to +50°C and be stored in the environment of -40°C to +80°C. It has strong adaptability to different climate conditions and can be used in various indoor and outdoor general occasions.
Application Scenarios of CJT Series Changeover Switch
The CJT series changeover switch of C&J Electrical has the characteristics of modular design, multiple specifications, high safety and convenient operation. It is widely used in various industrial, commercial and civil scenarios that need dual power switching, covering small and medium-sized power supply systems. The main application scenarios are as follows:
- Civil electrical field: It is used in residential communities, villas, ordinary residences and other places to switch between municipal power and standby power (such as generator power, solar energy storage power). When the municipal power is cut off, users can manually switch to the standby power through the CJT series changeover switch to ensure the normal use of basic electrical appliances such as lighting, refrigerators and water pumps.
- Commercial field: It is applied to shopping malls, supermarkets, office buildings, hotels and other commercial places, used for power switching of lighting systems, air conditioning systems, cash registers, monitoring equipment and other loads. The clear operation and stable performance can avoid economic losses caused by power interruption or switching failure.
- Industrial field: It is used in ordinary workshops, small factories, warehouses and other industrial places to switch the main power and standby power of small and medium-sized electrical equipment (such as fans, pumps, electric tools). The modular design is convenient for installation in distribution cabinets, saving installation space and improving the integration of the electrical system.
- Public facility field: It is applied to public facilities such as street lamp control boxes, community public lighting systems and small outdoor power supply equipment to realize the switching between different power sources, ensure the normal operation of public facilities and improve the reliability of power supply.
- Small new energy scenarios: It is used in small solar energy storage systems, household energy storage systems and other scenarios to switch between new energy power and municipal power, improve the utilization rate of new energy and ensure the stability of power supply for household and small commercial loads.
CJT Series Changeover Switch: Product Advantages & Detailed Technical Parameters
Compared with other manual changeover switch products on the market, the CJT series of C&J Electrical has obvious advantages in design, performance, installation and use, and its core product advantages and detailed technical parameters are as follows:
Core Product Advantages
- Modular design, wide current range: As a modular 63A manual changeover switch, it is specially developed to expand the current range of modular changeover switch to 63A, which can meet the use needs of medium-power loads and fill the market gap of high-current modular manual changeover switch.
- Integrated structure, safe and reliable: The integrated design is adopted, with compact structure and high structural strength. The widened arc handle is comfortable to operate, and the power supply status is clear at a glance, which effectively avoids misoperation and ensures the safety of operation and use.
- Transparent window design, easy to manage: Equipped with a transparent window, users can freely note the use of each product, which is convenient for the management and maintenance of the electrical system, especially suitable for scenarios with multiple changeover switch configurations.
- DIN rail installation, convenient and efficient: It is designed for DIN rail installation, which can be quickly installed on the standard DIN rail, saving installation time and labor cost, and is convenient for later disassembly, maintenance and replacement.
- Multiple specifications, strong adaptability: It has multiple pole configurations of 1P, 2P, 3P and 4P, and the rated voltage is 230V (1P) and 400V (2P/3P/4P), which can be flexibly selected according to different circuit requirements and load types, with strong adaptability.
- High safety performance: It meets the relevant safety standards, has a rated insulation voltage of 500V and a rated impulse withstand voltage of 4kV, which can effectively avoid insulation damage and electric shock hazards, ensuring the safety of users and equipment.
Detailed Technical Parameters
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Parameter
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Details
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|---|---|
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Nb of pole
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1P, 2P, 3P, 4P
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Operational voltage (Ue)
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230V (1P), 400V (2P/3P/4P)
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Thermal current Ith (40°C)
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63A
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Operational frequency
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50/60Hz
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Rated insulation voltage (Ui)
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500V
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Rated impulse withstand voltage Uimp
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4kV
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Working temperature
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-20°C ~ +50°C
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Storage temperature
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-40°C ~ +80°C
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Why Choose C&J Electrical CJT Series Changeover Switch?
In the changeover switch market, there are many products with uneven quality, but the CJT series changeover switch of C&J Electrical stands out with its comprehensive advantages and becomes the preferred choice for users who pursue stability, safety and convenience. The reasons for choosing it are as follows:
- Professional R & D and production strength: C&J Electrical has rich experience in the R & D and production of electrical switching components. The CJT series changeover switch is independently developed and produced by the company, with strict quality control and stable product performance, which can meet the use needs of various scenarios.
- Precise positioning and targeted design: Focusing on the core demand of dual power manual switching, it is specially developed to expand the current range of modular changeover switch to 63A, which is more suitable for ordinary industrial, commercial and civil scenarios, with higher cost performance.
- Humanized design, easy to use: The widened arc handle, clear power supply indication and transparent window design make the operation and management of the changeover switch more convenient, reducing the difficulty of operation and maintenance, and being easy for operators to master.
- Flexible customization services: C&J Electrical supports OEM brand customization services for the CJT series changeover switch. It can customize product labels, logos and other details according to user needs, meeting the personalized needs of different customers and markets.
- Professional after-sales guarantee: C&J Electrical has a professional technical and after-sales team, which can provide users with product selection guidance, technical consultation and after-sales maintenance services, solving users’ worries about use and maintenance.
Get in Touch
If you have any questions about the CJT serieschangeover switch, such as product specifications, technical details, customization needs or bulk orders, please feel free to contact C&J Electrical. Our professional team will provide you with high-quality changeover switch solutions and reliable services to ensure the safe and stable operation of your electrical system.
Post time: Feb-27-2026