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Power Capacitors
- BY71 Series Cylindrical Capacitor
- BSMJ Series Self-healing Low Voltage Shunt Capacitors
- BY86 Series Controlled Intelligent Capacitor
- BYKXG/F Series Anti-harmonic Intelligent Capacitor
- BY81 Series Intelligent Capacitor
- BY82J Series Anti-harmonic Intelligent Capacitor
- BY89 Series Intelligent Capacitor
- Intelligent Controller Series
- Reactor
- Intelligent Switch Series
- Alternating Current Contactor
- Multifunctional power instruments
- Circuit Breaker
- APF/SVG/SPC Cabinet & Module Series
BYB1-63 High Breaking Capacity Miniature Circuit Breaker MCCB 240V Low Voltage Miniature Circuit Breaker
Main Technical Parameters of BYB1 - 63 High Breaking Capacity Miniature Circuit Breaker
| Model | BYB1 - 63 High Breaking Capacity Miniature Circuit Breaker |
| Rated voltage | 240V |
| Rated current | 1-40A |
| Breaking capacity（A） | 6000 |
| Working frequency | 50Hz |
| Altitude | not exceeding 2000m |
| Ambient air temperature | not exceeding +40° C and not below -5°C,with a 24-hour average notexceeding+35° C |
| Relative humidity of the surrounding air | at an ambient temperature of +40°C, relative humidity not exceeding50%;at lower temperatures, higher relative humidity is permissible. The maximum monthly average relative humidityin the wet test month is 90%, with the average minimum temperature of that month being +25°C, Condensation on theproduct due to temperature changes is permissible. |
Overview of BYB1 - 63 High Breaking Capacity Miniature Circuit Breaker
Developed by Baoyu Holdings Limited, the BYB1-63 series Miniature Circuit Breaker (MCB) is engineered for Low Voltage Breakers systems, integrating High Breaking Capacity, intelligent protection, and multi-functional performance. Designed for AC/DC Circuit environments, it delivers robust Circuit Protection across industrial, commercial, and residential applications. Featuring an MCCB Molded Case Circuit Breaker structure, this product supports MCCB 3 Phase configurations with a rated voltage of 240V and an exceptional 10kA breaking capacity, ensuring reliable protection against short circuits, overloads, and Ground Fault Protection hazards.As a leading MCCB Circuit Breaker Manufacturer, we combine advanced Air Circuit Breaker Protection technology with High/Low Impedance Differential Protection mechanisms. Our solution effectively mitigates harmonic interference, phase imbalances, and voltage fluctuations in Power System Devices. Compatible with international standards such as Siemens Betagard MCB and Wylex MCB Circuit Breakers, the BYB1-63 series incorporates a Drawout Circuit Breaker design for easy maintenance and upgrades, while meeting rigorous Breaker Testing requirements.
Optimized for the Power Industry, this series excels in Electrical Switchgear and Protection scenarios, serving as a Main Switch Circuit Breaker to safeguard critical infrastructure. Its MCCB Trip mechanism utilizes a thermomagnetic trip system for precise overcurrent and short-circuit response. Enhanced with SF6 Circuit Breaker-grade insulation materials, it guarantees durability and stability in demanding environments. The product also supports ECB Breaker module expansions, enabling rapid Short Circuit Breaker interruption to protect Power of Energy networks.Certified with ISO 9001 the BYB1-63 series delivers intelligent Circuit Breaker Circuit management and AC Protection Circuit capabilities for AC in Low Voltage systems. Whether deployed in Power Industry grids, Electric Circuit Breaker panels, or SF6 Breaker-integrated setups, it ensures seamless integration with Electrical Switchgear and Protection systems while prioritizing Circuit Protection and energy efficiency.From Air Circuit Breaker Protection to Ground Fault Protection, this Miniature Circuit Breaker redefines reliability in Low Voltage Breakers, making it an indispensable component for modern Power System Devices and sustainable energy solutions.
BYB1 High Breaking Capacity Miniature Circuit Breaker is a curent-limiting high breaking capacity miniature circuitbreaker with dual protection against overload and short circuit. lt is suitable for circuits with AC 50/60Hz, rated voltageup to 2401415Vand is used for line overload and short circuit protection.It is not suitable for motor protection.
Working Principle of BYB1 - 63 High Breaking Capacity Miniature Circuit Breaker
Overload protection: In the event of a sustained overcurrent condition (e.g. exceeding the rated current), the thermal release activates. The bimetallic strip bends due to the heat, triggering a mechanical trip that opens the circuit. This prevents damage due to prolonged overcurrent.
Short Circuit Protection: Magnetic trip devices respond instantly to sudden, high current faults such as short circuits. The solenoid coil generates a magnetic field proportional to the fault current, which quickly triggers the trip device and isolates the circuit within milliseconds.
High breaking capacity: BYB1-63 series is designed with a breaking capacity of up to 10kA, ensuring reliable interruption of extreme fault currents, exceeding the industry standard of high breaking capacity MCB .
Reset Function: After tripping, the circuit breaker can be manually reset after the fault is resolved, ensuring minimal downtime and continuous circuit protection.
The Advantages of BYB1 - 63 High Breaking Capacity Miniature Circuit Breaker
• Miniature circuit breakers respond more sensitively to current than fuses.
• It detects faults in the electric current and automatically shuts down the circuit.
• It provides a better interface using knobs.
• Electrical handling of MCB is safer.
• Reusable.
• Requires less maintenance.
• Due to its sensitivity, it can react quickly to short circuits and overloads.
• More reliable.
• Its replacement cost is low.
• Very easy to use.
• It automatically shuts off the power and supply connections.
• It can identify faulty circuits.
• Good performance.
• Miniature circuit breakers have good leakage and fault circuit identification performance.
• The circuit breaker has a time delay feature and the action is more accurate.
Product Size Information
Application of BYB1-63 high breaking capacity miniature circuit breaker in buildings
BYB1-63 miniature circuit breaker (MCB) is a key component of modern building electrical systems, providing high breaking capacity (6kA) and low voltage protection (240V), designed for commercial and residential infrastructure. In office buildings and high-rise buildings, it provides overload and short-circuit protection for lighting circuits, HVAC systems and switchboards. Its compact design and modular mounting (1P-4P configuration) can be seamlessly integrated into the DIN rail system, thereby reducing the space requirements of electrical cabinets.For smart buildings, the BYB1-63 supports integration with energy management systems to enable real-time monitoring of power loads. This feature is critical to improving power quality, preventing voltage fluctuations from damaging sensitive equipment such as servers or IoT devices. In addition, its flame-retardant housing and visual window (which displays contact status) enhance safety compliance in flammable environments.
BYB1-63 Application in Industry
In industrial environments, the BYB1-63 is an excellent choice for protecting motor control centers (MCCs), production lines, and heavy machinery from electrical faults. Its 6kA breaking capacity ensures reliable interruption of short-circuit currents common in manufacturing plants, while the B/C/D trip curve provides customizable protection for inductive loads such as motors and transformers.For environments with high harmonic content (e.g., factories with variable frequency drives), the circuit breaker’s robust design mitigates thermal stress caused by current distortion, consistent with power quality solutions such as harmonic filters and reactive power compensation systems. Its high mechanical life (20,000 cycles) minimizes downtime during repetitive switching operations, which is critical for automated assembly lines.In industrial solar farms, the BYB1-63 protects DC/AC inverters from grid surges, complementing solar surge protection devices (SPDs) 3. Its IP20-rated housing is dust and moisture resistant, making it ideal for harsh environments such as steel mills or chemical plants.
BYB1-63 in community applications
BYB1-63 plays a key role in community infrastructure, ensuring the safety of residential areas, public facilities and renewable energy systems. In multi-family buildings, it protects shared grids (e.g. elevators, water pumps) from overloads, while its 1P+N configuration enhances leakage current detection to prevent ground faults.For smart communities, the breaker can be integrated with prepayment meters to enable remote power disconnection via shunt trip technology. This feature enables utility providers to manage energy theft and improve billing efficiency. In public lighting systems, its 6kA fault tolerance ensures uninterrupted operation during grid fluctuations, while its compact size simplifies retrofitting of aging switchboards.In solar communities, BYB1-63 is used in conjunction with DC surge protectors (SPDs) to protect PV arrays and battery storage systems and to handle transient voltages caused by lightning strikes . The product complies with IEC standards, ensuring its global suitability for use in everything from urban development to rural electrification projects.
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Baoyu Holdings Limited
Baoyu Holdings Limited is a leading global provider of advanced power quality solutions, focusing on intelligent full-control energy management and intelligent circuit protection systems. Since our founding, we have been committed to providing innovative products to solve harmonic distortion, three-phase imbalance, reactive power problems, and circuit instability. Our customized solutions optimize grid efficiency, reduce energy losses, and improve system reliability in industries around the world. With ISO 9001 certification and the support of a team of experts, we combine cutting-edge technology with strict quality control to meet a variety of customer needs. Baoyu can be trusted to protect your power infrastructure, improve power quality, and drive sustainable performance. Partner with us to create smarter and safer energy solutions.
Power quality solutions:Harmonic Filters: Eliminate harmonic distortion caused by non-linear loads (e.g. variable frequency drives, UPS systems).
Three-phase unbalance corrector: balances loads, prevents equipment damage and improves energy efficiency.
Reactive power compensator: optimize power factor, reduce electricity costs and enhance grid stability.
Circuit Protection Products:
- Smart circuit breakers: Provide real-time monitoring and fault detection to protect critical systems.
- Surge protection device (SPD): Protects equipment from voltage spikes and lightning strikes.
Technical advantages：
- Intelligent driven technology: Our products integrate machine learning algorithms for predictive maintenance and adaptive power management.Real-time monitoring: Advanced sensors and cloud-based platforms enable remote diagnostics and instant alerts for proactive problem resolution.
- Patented Innovation: Proprietary designs such as hybrid active filter and dynamic voltage regulator ensure superior performance.
Manufacturing Excellence:
- Automated Production: State-of-the-art facilities equipped with robotic assembly lines guarantee precision and scalability.
- Strict Quality Control: ISO 9001 certification process and strict testing protocols ensure compliance with international standards.
- Global Compliance: Our products comply with international certifications, ensuring seamless integration into global markets.
Our solutions are trusted by manufacturers, data centers, renewable energy plants, and commercial complexes, and are optimized for industrial power systems, energy efficiency, and smart grid infrastructure. We focus on innovation, reliability, and customer-centric services to help companies achieve cost-effective energy management and resilient power operations. Explore our solutions today and experience the future of power quality.
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