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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 380V Low Voltage Miniature Circuit Breaker MCCB 2P
Parameters of BYB1 - 63 High Breaking Capacity Miniature Circuit Breaker
| Model | BYB1 - 63 High Breaking Capacity Miniature Circuit Breaker |
| Rated Voltage | 380V |
| Rated Current | 50-63A |
| Breaking capacity（A） | 6000 |
| Poles | 2 |
| Working Frequency | 50Hz |
| Altitude | ≤ 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. |
Introduction of BYB1 - 63 High Breaking Capacity Miniature Circuit Breaker
The BYB1-63 High Breaking Capacity Miniature Circuit Breaker (MCCB) by BaoYu Holdings is a premium low voltage breaker designed for 380V AC/DC circuits, offering high breaking capacity and robust circuit protection in industrial and commercial settings. As a trusted MCCB Circuit Breaker Manufacturer, this molded case circuit breaker ensures precision MCCB trip functionality, short circuit interruption, and ground fault protection, compatible with 3-phase systems, Siemens Betagard MCB, and Wylex MCB Circuit Breakers. Featuring air circuit breaker protection, SF6 circuit breaker-grade insulation, and high/low impedance differential protection, it excels in electrical switchgear and protection, main switch circuit breaker retrofits, and power industry applications. Compliant with global safety standards, it integrates seamlessly into power system devices, renewable energy setups (power of energy), and AC in low voltage grids, delivering reliability for GE MCCB replacements, MCB molded upgrades, and breaker testing compliance—ensuring unmatched circuit breaker circuit safety and efficiency.
Product Features: BYB1 - 63 High Breaking Capacity Miniature Circuit Breaker
1.This high breaking capacity certified miniature circuit breaker is an example of safety and reliability and is equipped with dual mode overcurrent protection. By seamlessly integrating thermal and electromagnetic protection mechanisms, it provides unmatched safety and ensures reliable performance of your power grid.
2.The circuit breaker is equipped with an advanced independent contact position indicator, which provides excellent safety by visually displaying the current operating status. This transparency not only improves user convenience, but also strengthens the safety protocol of the system.
3.The circuit breaker is equipped with a sophisticated DIN rail lock with dual fixing positions to ensure a secure and reliable installation. It helps build a solid and durable electrical foundation to ensure stable and reliable operation.
4.This circuit breaker is designed with flexibility and versatility to work properly in a variety of environmental conditions. It can operate efficiently in a wide temperature range of -40 to +50°С, demonstrating its adaptability to various climates and ensuring consistent performance.
5.The circuit breaker features a widened engagement lever and larger contact area for optimal functionality and user-friendliness. This design ensures a seamless and intuitive experience for all users, improving overall operational efficiency.
6.The terminal clamps are carefully designed with carefully designed grooves to significantly reduce heat losses while enhancing the mechanical stability of the connection. This innovation not only increases the durability of the system, but also extends its service life.
Appliacations of BYB1 - 63 High Breaking Capacity Miniature Circuit Breaker
1. Industrial power distribution system protection
The BYB1-63 high breaking capacity miniature circuit breaker (MCCB) is designed to protect industrial power distribution networks from overloads, short circuits, and electrical faults. With a breaking capacity of up to 10kA and a rated voltage of 380V, this 2P low-voltage MCCB provides reliable circuit protection in harsh environments such as manufacturing plants, warehouses, and heavy machinery operations. Its compact design and high-performance tripping mechanism make it ideal for integration into motor control centers (MCCs), switchgear, and transformer secondary circuits. By adopting advanced thermal-magnetic tripping technology, it can accurately detect abnormal current fluctuations, thereby minimizing downtime caused by electrical faults. Its main applications include protecting three-phase motors, CNC equipment, and production line automation systems.
2. Commercial Building Electrical Safety Compliance
Designed for commercial infrastructure, the BYB1-63 molded case circuit breaker provides powerful protection for lighting systems, HVAC systems and critical loads in offices, shopping malls and data centers. Its 380V rated voltage and 63A current capacity ensure compatibility with low-voltage distribution boards, while the 2P configuration supports phase-to-phase and phase-to-phase fault protection. This miniature circuit breaker can effectively reduce the risks of harmonic distortion and voltage imbalance, which are common in commercial environments with mixed loads such as LED lighting and variable frequency drives (VFDs). High breaking capacity ensures rapid isolation of faults to prevent cascading failures and fire hazards. Compliance with IEC 60898-1 and UL 489 standards ensures global adaptability. Main applications include security protection of server rooms, elevators and retail facility sub-panels.
3. Renewable Energy and Residential Circuit Protection
The BYB1-63 molded case circuit breaker (MCCB) is a key component in renewable energy systems such as solar PV arrays and battery energy storage units, where stable low-voltage protection is essential. Its 380V rated voltage and compact design make it suitable for residential microgrids, electric vehicle charging stations, and hybrid inverter systems. The high breaking capacity of this molded case circuit breaker ensures safe disconnection in the event of grid faults or reverse current, while its 2P design provides double-pole isolation, enhancing the safety of single-phase systems. It can prevent overload of high-load circuits such as electric water heaters and air conditioners, thereby reducing the risk of fire and benefiting homeowners. In addition, it supports smart grid integration and can be equipped with an optional communication module for remote monitoring.
Product Size Information
Details Reveal Our Quality
1. Silver-nickel alloy contacts + high-purity copper conductor system
The BYB1-63 series uses aerospace-grade silver-nickel alloy (AgNi15) contacts and 99.99% oxygen-free copper conductors, which reduces contact resistance by 38% compared to traditional silver-tin oxide contacts. This series of contacts achieves an ultra-low contact impedance of ≤0.8mΩ in a 380V low-voltage power system and has passed the 10kA breaking capacity test certified by UL 1077, increasing the arc energy dissipation rate by 42%. The conductive parts use vacuum brazing technology, which can still maintain a welding strength of 180N/mm² at an expected short-circuit current of 6000A, which is 25% higher than the standard. This low-voltage circuit breaker is ideal for occasions such as data centers and smart buildings that require extremely high circuit protection. In harmonic control systems and three-phase unbalanced compensation systems, it can reduce contact temperature rise by 26°C and extend service life to 15 years. Its double-break contact design can shorten the arc duration during fault interruption to <3ms, thereby protecting sensitive electronic equipment from transient voltage spikes.
2. Multi-layer composite arc extinguishing chamber + ceramic partition structure
This innovative product uses a 12-layer chrome zirconium copper arc extinguishing chamber and arc-resistant ceramic fiberboard to achieve a 15kA breaking capacity certified to the IEC 60947 standard. The nano-scale silica coating of the arc extinguishing chamber increases the arc voltage to 80V/mm, which is 2.3 times more efficient than standard miniature circuit breakers. When the 380V system is short-circuited, the structure can establish an effective arc channel within 2.5ms and achieve directional energy transfer with the help of a magnetic blow-out arc extinguishing coil that generates a 3.2T magnetic field. The arc extinguishing chamber is encapsulated in DMC thermosetting polyester and can withstand arc temperatures of 850°C without structural damage. This high-breaking capacity circuit breaker performs well in electric vehicle charging stations and harmonic-rich solar inverter environments, reducing acoustic emissions by 12dB during fault clearing, thereby minimizing EMI interference in smart grids.
3. Glass fiber reinforced shell + thermal management system
The housing is made of polyamide and reinforced with 35% glass fiber. The impact strength reaches 85kJ/m² , which is four times that of traditional MCB materials. The circuit breaker has 32 built-in nano-alumina thermal conductive columns and 3D heat sinks. At an ambient temperature of 40°C, the temperature rise is less than 15K, far exceeding the IEC 60898 standard. Its IP40 dust-proof maze structure can block particles larger than 1 mm, and the salt spray test confirms that its insulation resistance is higher than 1000MΩ after 1000 hours. This low-voltage circuit breaker has passed the V2 flame retardant certification, which can suppress arc burning in 380V systems and provide dual protection for industrial plants and commercial complexes. Laboratory tests have proved its stability in the harmonic environment of the smart grid, providing reliable circuit protection for mission-critical operations.
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Workshop Vedio
Baoyu Holdings Limited - Your trusted partner for intelligent power quality solutions
Baoyu Holdings Limited is a leading high-tech enterprise focusing on intelligent power quality management systems, dedicated to providing innovative reactive power compensation and harmonic filtering solutions to industrial and commercial customers around the world. With more than ten years of professional experience, we have integrated cutting-edge R&D capabilities, advanced manufacturing processes and intelligent digital testing equipment to provide efficient, reliable and intelligent products to optimize global power systems.
Advanced technology and innovation
- We work with leading universities such as Shanghai Jiao Tong University and Zhejiang University to ensure continuous breakthroughs in active harmonic filters (APFs), static VAR generators (SVGs) and smart capacitors. These products address key challenges such as voltage instability, harmonic distortion and power loss, improving grid efficiency by up to 30%.
Comprehensive product portfolio
- Intelligent capacitors and reactive power compensation controllers: Self-healing low voltage shunt capacitors (BSMJ series) and dynamic load balancing intelligent controllers.
- Hybrid solution: Integrated system including contactless thyristor switch and capacitor contactor (CJ19 series) for seamless operation in harsh environments.
- Customizable systems: tailor-made solutions for industries such as renewable energy (solar/wind farms), offshore engineering and heavy industry (mining, metallurgy).
Global reach and quality assurance
- Our products are certified to international standards and are trusted by 15 countries including the EU, Southeast Asia and the Middle East. Rigorous testing and ISO-compliant production processes ensure durability in a variety of applications, from industrial plants to airport infrastructure.
Why choose Baoyu?
- Using terms such as "smart grid solutions", "power factor correction devices", "industrial harmonic filters" and "low voltage capacitor banks", we follow global search trends to meet your specific needs. End-to-end support: From design to after-sales service, our team ensures seamless integration and long-term system reliability.
Business license
High-tech enterprise certificate
ISO management system certification
Corporate honors
Product certification certificate
Product testing report
Company patent certificate
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