First, we clarify the basic definition and core function of Rccb Residual Current Circuit Breaker: RCB or Residual Current Breaker are electrical devices that cut the current from the electrical current so as to prevent electrocution. The current leakage that it can detect is from 5 milliamperes to 30 milliamperes. Essentially, RCB is utilized in circuits to secure human life from electric shock or electrocution. In short, the Rccb Residual Current Circuit Breaker is a safety device that detects the residual current (leakage current) in the circuit and automatically cuts off the power supply when the leakage current exceeds the set value[2][7]. It is also called RCB for short, and is an important part of the low-voltage electrical protection system[7].
It is necessary to distinguish the difference between Mcb Rccb, which is a common confusion point for many users[4].MCB (Miniature Circuit Breaker) mainly provides overload and short-circuit protection for circuits and equipment, preventing damage caused by excessive current, but it cannot detect leakage current[4]. The Rccb Residual Current Circuit Breaker focuses on leakage protection, specializing in preventing electric shock and electrical fires caused by leakage, but it does not have the function of overload and short-circuit protection[4]. Therefore, in practical applications, Mcb Rccb are often used together to form a comprehensive electrical protection system, which can simultaneously realize overload, short-circuit and leakage protection, ensuring the safety of the circuit and personnel[1][4].
When choosing a Rccb Residual Current Circuit Breaker, Rcd Breaker Sizes is one of the key factors to consider[3]. The size of the RCD breaker is mainly determined by parameters such as rated current, rated residual operating current, and pole number, which need to be matched according to the actual circuit load and protection requirements[3][7]. For example, the rated current of the Rccb Residual Current Circuit Breaker should be consistent with the load current of the circuit, and the rated residual operating current should be selected according to the protection object (30mA is suitable for personal protection, 300mA is suitable for fire protection)[3][7]. C&J Electrical’s CJL16-63-B Rccb Residual Current Circuit Breaker provides a variety of specifications to meet different Rcd Breaker Sizes needs of users[6][8].
Working Principle of Rccb Residual Current Circuit Breaker
The working principle of the Rccb Residual Current Circuit Breaker is based on Kirchhoff’s current law, which states that the total current entering a node is equal to the total current leaving the node[2]. Its internal structure includes a toroidal transformer, a sensing coil, a relay and other components[2]. Under normal working conditions, the current in the live wire and neutral wire of the circuit is balanced, and the magnetic fluxes generated by the two currents in the toroidal transformer cancel each other out, so the sensing coil does not induce voltage, and the Rccb Residual Current Circuit Breaker remains closed, and the circuit operates normally[2][7].
When an insulation fault occurs between the phase line and the ground (such as damaged wire insulation, equipment leakage), part of the current will leak to the ground, resulting in an imbalance between the live wire current and the neutral wire current[2][7]. At this time, the magnetic flux in the toroidal transformer will no longer cancel each other out, and the sensing coil will induce a voltage, which triggers the relay to act, driving the Rccb Residual Current Circuit Breaker to trip quickly and cut off the fault loop[2][7]. This process only takes a few milliseconds, which can effectively prevent electric shock accidents and avoid the expansion of faults[2].
The CJL16-63-B Rccb Residual Current Circuit Breaker produced by C&J Electrical is an electromagnetic type Rccb Residual Current Circuit Breaker without auxiliary power supply[6]. It overcomes the defects of electronic products such as poor dry resistance, being affected by power grid voltage fluctuations, and inability to protect when the neutral line is disconnected, and broadens the scope of residual current protection[6].
Core Functions of Rccb Residual Current Circuit Breaker
As a professional electrical protection device, the Rccb Residual Current Circuit Breaker integrates multiple practical functions, focusing on leakage protection, while also having multiple auxiliary protection functions to provide comprehensive protection for the circuit. Taking C&J Electrical’s CJL16-63-B Rccb Residual Current Circuit Breaker as an example, its core functions are as follows:
- Leakage Protection Function: This is the core function of the Rccb Residual Current Circuit Breaker[7]. When the insulation fault occurs between the phase line and the ground and the residual current is greater than the set value, the fault loop is automatically removed, which can effectively prevent electric shock accidents caused by leakage and protect personal safety[6].
- Isolation Protection Function: It has dual protection performance of leakage and isolation[6]. When theRccb Residual Current Circuit Breaker trips, it can completely isolate the power supply, prevent the fault circuit from being re-energized, and provide a safe operation environment for maintenance personnel[6].
- Short-Circuit Current Tolerance Function: It has high short-circuit current tolerance and a rated breaking capacity of 6000A[6], which can withstand the impact of short-circuit current, avoid damage to the device itself, and ensure the stability of the circuit[6][8].
- Status Indication Function: Equipped with a contact position indicator window, users can intuitively observe the on-off status of the Rccb Residual Current Circuit Breaker, which is convenient for daily inspection and fault handling[6].
- Easy Operation and Maintenance Function: The curved lid and handle make operation more comfortable and the appearance more beautiful[6]; the transparent clamshell with label is convenient for users to view product information and specifications, and is easy to maintain[6].
- Wide Adaptability Function: The electromagnetic type design without auxiliary power supply can adapt to different power grid environments, overcoming the defects of electronic products, and can work stably even when the power grid voltage fluctuates or the neutral line is disconnected[6].
Application Scenarios of Rccb Residual Current Circuit Breaker
Due to its reliable protection performance, the Rccb Residual Current Circuit Breaker is widely used in various fields that require electrical safety protection, covering residential, commercial, industrial, municipal and other scenarios[1][7]. The CJL16-63-B Rccb Residual Current Circuit Breaker produced by C&J Electrical, with its multiple specifications and high safety performance, is suitable for the following specific scenarios:
- Residential Scenarios: It is widely used in households, especially in high-risk areas such as kitchens, bathrooms, and balconies[7]. These areas are often in contact with water, which increases the risk of electric leakage of electrical equipment (such as water heaters, washing machines, and refrigerators)[7]. The Rccb Residual Current Circuit Breaker can quickly detect leakage current and cut off the power supply, protecting the safety of family members[7]. The 2P model of CJL16-63-B is suitable for single-phase household circuits, and the 4P model is suitable for households with three-phase power supply[6][8].
- Commercial Scenarios: Applied to shopping malls, supermarkets, hotels, office buildings and other commercial places[1][4]. These places have a large number of electrical equipment and dense personnel. The Rccb Residual Current Circuit Breaker can effectively prevent electric shock accidents and electrical fires, ensuring the normal operation of the business and the safety of personnel[1][4]. According to different Rcd Breaker Sizes and load requirements, choosing the appropriate rated current (25A, 32A, 40A, 63A) can better adapt to the commercial power supply system[6].
- Industrial Scenarios: In industrial workshops, factories and other places, the Rccb Residual Current Circuit Breaker is an important part of the power distribution system[1][4]. It is used to protect industrial equipment (such as motors, sensors, and control cabinets) from leakage damage, and protect the safety of operators[1][4]. The CJL16-63-B Rccb Residual Current Circuit Breaker has high short-circuit current tolerance and wide environmental adaptability, which can meet the harsh working environment of industrial sites[6].
- Municipal and Public Facility Scenarios: Used in municipal power distribution, road lighting, subway stations, hospitals and other public facilities[1][4]. These places are related to public safety, and the Rccb Residual Current Circuit Breaker can ensure the stable operation of electrical equipment and avoid safety accidents caused by leakage[1][4].
- OEM Supporting Scenarios: Suitable for OEM supporting, it can be integrated into various power distribution equipment and systems to provide professional leakage protection functions for the equipment[1][6]. Multiple specifications can be flexibly matched with different OEM products, improving the added value and competitiveness of the whole equipment[6].
Overview of C&J Electrical CJL16-63-B Rccb Residual Current Circuit Breaker
To meet the diverse needs of the market for Rccb Residual Current Circuit Breaker, C&J Electrical has independently developed and produced the CJL16-63-B Rccb Residual Current Circuit Breaker. This product is an electromagnetic type Rccb Residual Current Circuit Breaker designed in accordance with IEN61008/IEN62423 standards[5][6]. It has dual protection performance of leakage and isolation, high safety performance, and a variety of specifications optional, which can meet different Rcd Breaker Sizes and application scenario requirements[6].
The CJL16-63-B Rccb Residual Current Circuit Breaker adopts imported high flame-retardant, high-temperature and impact-resistant plastics for the shell and parts, which has good durability and safety[6]. It is an electromagnetic leakage circuit breaker without auxiliary power supply, which overcomes the defects of electronic products and broadens the scope of residual current protection[6]. The product supports OEM brand customization services, and can be customized according to the specific needs of users, including brand LOGO, product specifications and functions, to meet the personalized needs of different users and OEM partners[6].
Structural Characteristics and Technical Data of CJL16-63-B Rccb Residual Current Circuit Breaker
Structural Characteristics
- Curved lid and handle make operation more comfortable and beautiful appearance;
- Contact position indicator window;
- Transparent clamshell with label;
- With leakage and isolation dual protection performance;
- The upper and lower terminals can be connected to cables and U-shaped and pin-shaped busbars at the same time;
- High short-circuit current tolerance;
- The shell and parts are made of high flame retardant, high temperature and impact resistant plastics imported from abroad;
- When the insulation fault occurs between the phase line and the ground and the residual current is greater than the set value, the fault loop is automatically removed;
- Electromagnetic leakage circuit breaker without auxiliary power supply, overcome the electronic products poor resistance to dry, affected by power grid voltage fluctuations and neutral line disconnected can not protect the defects, broaden the scope of residual current protection.
Technical Data
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Technical Parameters
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Specifications
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Standard
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IEN61008/IEN62423
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Type
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Electromagnetic type
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Characteristics of residual operation current
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B,F
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Poles
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2P,4P
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Rated operating break capability
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10 InA
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Rated current (A)
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25,32,40,63A
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Rated voltage
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AC 240/415V
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Rated frequency
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50/60Hz
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Rated residual operation current I△n (A)
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0.03, 0.1,0.3 and 0.5
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Rated residual inactive current
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0.5I△n~1△n
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Connection height
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19mm
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Mechanical electrical life
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4000 times
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Terminal cross-sectional area
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25mm² or less
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Terminal
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Screw terminal
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Connection mode
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column type connection mode
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Tightening torque
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2N.m
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Rated breaking capacity
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6000A
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Installation
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35.5mm guide rail installation or Vertical installation
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Enclosure protection class
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IP20
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Smooth DC Residual Current Trip Range (Type B)
Under the premise that type B meets type A, the following requirements should also be met:
- When the smooth residual current of 0.4 times the rated residual operating curent (l△n) or the smooth DC residual curent of 10mA (whichever is larger) is superimposed on the rated frequency AC residual curent,type B RCCB should operate, and the AC trip current should be less than or equal to I△n;
- When the smooth DC residual current of 0.4 times the rated residual operating current (l△n) or the smooth DC residual curent of 10mA is superimposed on the pulsating DC residual current, the type B RCCB should operate. For the RCCB of l△n >0.01A,the trip current should not be greater than 1.4 l△n,or for l△n≤0.01 RccB, should not be greater than 2 l△n;
- The steady increase of pulsating DC residual curent generated by the two rectifier circuits, the type B RCCB shall operate in the range of 0.5l△n to 2l△n (trip time is shown in the table above);
- Relative to the steady increase of pulsating DC residual curent generated by the rectifier circuit, type B RCCB shall operate in the range of 0 .5I△n to 2l△n (trip time is shown in the table above);
- For steady increase of smooth DC residual current, type B RCCB should operate in the range of 0.5l△n to 2l△n (trip time is shown in the table above);
- When the compound residual current is steadily increasing, the correct operation, type B RCCB should operate in the range of 0.5l△n to 1.41△n.
Product Advantages of CJL16-63-B Rccb Residual Current Circuit Breaker
In the competitive Rccb Residual Current Circuit Breaker market, the CJL16-63-B Rccb Residual Current Circuit Breaker produced by C&J Electrical has obvious advantages, relying on its stable performance, complete functions and high cost performance, and has won the trust of users. Compared with ordinary Rccb Residual Current Circuit Breaker products on the market, its specific advantages are as follows:
- Compliant with International Standards: The product is designed in accordance with IEN61008/IEN62423 international standards[5][6], ensuring that its performance and safety meet international requirements, and can be widely used in domestic and foreign markets[6].
- Multiple Specifications Optional: The product has 2P and 4P pole numbers, the rated current covers 25A, 32A, 40A, 63A, and the rated residual operation current includes 0.03A, 0.1A, 0.3A and 0.5A[6], which can flexibly meet different Rcd Breaker Sizes needs and adapt to various application scenarios[6].
- High Safety Performance: It has dual protection performance of leakage and isolation, which can comprehensively protect the circuit and personnel[6]; equipped with high short-circuit current tolerance and rated breaking capacity of 6000A, it can withstand the impact of short-circuit current[6]; the shell and parts are made of imported high flame-retardant, high-temperature and impact-resistant plastics, which have good flame retardant and anti-impact performance[6]; the enclosure protection level reaches IP20, which can effectively prevent dust and small foreign objects from entering, protecting internal components[6].
- Stable Operation Performance: It is an electromagnetic leakage circuit breaker without auxiliary power supply[6], which overcomes the defects of electronic products such as poor dry resistance, being affected by power grid voltage fluctuations, and inability to protect when the neutral line is disconnected, and broadens the scope of residual current protection[6]. It can work stably in various complex power grid environments[6].
- Easy Operation and Maintenance: The curved lid and handle make operation more comfortable[6]; the contact position indicator window and transparent clamshell with label are convenient for users to observe the working status and view product information[6]; the upper and lower terminals can be connected to cables and U-shaped and pin-shaped busbars at the same time, which is convenient for wiring[6]; the 35.5mm guide rail installation or vertical installation mode is adopted, which is quick and convenient to install, saving installation time and labor costs[6].
- Strong Adaptability: The residual operation current characteristics include B and F types[6], which can adapt to different residual current types (such as AC residual current, pulsating DC residual current, smooth DC residual current)[5][6]; the operating temperature range is wide, which can adapt to different working environments[6].
- Support OEM Customization: We support OEM brand customization services, which can be customized according to the specific needs of users, including brand LOGO, product specifications and functions, to meet the personalized needs of different users and OEM partners[6].
- Widely Applicable Scenarios: The product is suitable for residential, commercial, industrial, municipal and other scenarios[1][6], and can be used as a professional leakage protection device for various electrical circuits and equipment[4][7]. It can also be used with MCB to form a comprehensive protection system, which has strong versatility[4].
Why Choose C&J Electrical CJL16-63-B Rccb Residual Current Circuit Breaker?
As a professional electrical equipment manufacturer, C&J Electrical has rich experience in R&D and production ofRccb Residual Current Circuit Breaker. The CJL16-63-B Rccb Residual Current Circuit Breaker produced by our company is manufactured through strict quality control and testing procedures, ensuring that each product meets relevant standards and has stable and reliable performance[6]. We always adhere to the user-oriented concept, continuously optimize product performance and improve product quality, to provide users with cost-effective and practical leakage protection solutions[4].
Compared with other Rccb Residual Current Circuit Breaker products on the market, our CJL16-63-B product has obvious advantages in standardization, performance and safety: compliance with international standards ensures wide applicability; multiple specifications can meet different Rcd Breaker Sizes needs; electromagnetic type design without auxiliary power supply ensures stable operation; dual protection performance of leakage and isolation and high short-circuit current tolerance ensure high safety performance[6]. In addition, the product supports OEM customization and has multiple specifications optional, which can better meet the personalized needs of users and partners[6].
We provide perfect after-sales service and technical support. If you have any questions about the selection, installation, use or customization of our CJL16-63-B Rccb Residual Current Circuit Breaker, or if you need to know more about Mcb Rccb matching and Rcd Breaker Sizes selection, please feel free to contact C&J Electrical. Our professional technical team will provide you with tailored solutions and reliable technical support to ensure that the product can play its best performance and meet your electrical safety protection needs.
Post time: May-08-2026