Explore our premium range of Air Circuit Breakers (ACB) and Molded Case Circuit Breakers (MCCB) built for critical utility-scale grids and renewable energy installations.
In global renewable distribution systems, the transition from traditional 1000V DC architectures to high-efficiency 1500V DC topologies has become standard. By increasing the operating voltage, commercial and industrial solar parks achieve lower Levelized Cost of Energy (LCOE). This shift reduces line losses and slashes copper wire usage across massive fields. However, higher DC voltages expose systems to much higher electrical fault currents and continuous, non-zero-crossing arcs.
To safely handle these challenges, modern solar farms deploy specialized DC Molded Case Circuit Breakers (DC MCCB) designed to isolate downstream faults within milliseconds. Unlike typical AC grids, direct current does not feature a natural sine wave zero-crossing point. As a result, extinguishing a DC arc requires dedicated magnetic blowouts and expansive arc chutes. These devices guide the arc away from the contact points, cooling and extinguishing it before it damages vital system assets.
Designing direct current switchgear demands a deep understanding of thermodynamics, gas ionization, and magnetic flux fields.
Powerful internal permanent magnets produce a transverse magnetic field. When the contacts open, this Lorentz force pushes the ionized arc away from the copper contacts and into the cooling de-ionizing grid plates.
By dividing the single arc into two distinct series arcs, our breakers double the arc voltage drop instantly. This double-break architecture guarantees swift circuit interruption, even during extreme short circuits.
Designed with adjustable bi-metallic strips for overload protection and electromagnetic plungers for instantaneous short-circuit protection, our breakers operate safely across fluctuating temperatures.
We build our breakers using state-of-the-art software systems, including PLM, BI, ERP, and MES, ensuring total traceablity and quality control.
To operate reliably in global markets, direct current circuit breakers must conform to stringent international standards like IEC 60947-2 and UL 489B. These specifications define the electrical testing procedures for photovoltaic circuit protection, detailing insulation resistance, dielectric performance, and ultimate short-circuit breaking capacity ($I_{cu}$).
At Acereare Electric, we maintain an on-site laboratory featuring over 150 advanced testing instruments and a team of 20+ specialized QC inspectors. We execute standard testing procedures to confirm compliance across several parameters:
Solar installations are exposed to the harshest outdoor conditions on earth. Our breakers are built and certified to operate flawlessly where standard switchgear fails.
We use high-grade, low-temperature resistant structural polymers and specialized lubricants, preventing mechanical binding and shell fracturing. Certified by official test reports to operate safely at -40°C.
Designed for offshore and coastal floating solar projects. Our internal metal components endure a rigorous salt spray aging cycle: 72 hours for the complete machine and 48 hours for semi-complete modules.
When operating above 2000m, thin air reduces both dielectric strength and heat dissipation efficiency. We supply precise altitude de-rating coefficients to ensure reliable operation in high-mountain arrays.
Our compact MCCBs are widely used in home solar arrays and battery cabinets, providing reliable protection against overloads and short circuits while maintaining a compact footprint.
To resist solar radiation in hot climates, our breaker components are tested in a 55°C constant-temperature chamber. The internal copper and iron parts are treated with a corrosion-resistant coating.
Our advanced MCCBs feature integrated microprocessors, supporting communication, high-precision metering, and edge computing, laying a reliable foundation for modern smart grids.
Founded in 2015, Acereare Electric operates two wholly-owned subsidiaries, "RuiRui Electric" and "KeRui Electric," bringing 20 years of craftsmanship to electrical protection.
Acereare Electric is a leading original equipment manufacturer integrating R&D, production, and sales. We specialize in Molded Case Circuit Breakers (MCCB), Air Circuit Breakers (ACB), and precision internal components. With over 20 years of expertise passed down through two generations of engineers, our team delivers high-quality electrical safety components to partners worldwide.
Through strategic investments in automation, our manufacturing plant ranks among the top OEM/ODM hubs in China. We leverage advanced ERP and U8 software to integrate scheduling and material planning. In doing so, we minimize production bottlenecks, maintain consistent quality, and guarantee on-time shipping for international bulk orders.
We manufacture a broad selection of circuit breakers, providing reliable performance and high quality across diverse solar and industrial projects.
The ARW1 series intelligent Air Circuit Breaker is designed for AC 50Hz distribution networks with rated voltages up to 690V and currents from 400A to 6300A. It provides high-precision selective protection to ensure system reliability. Equipped with an open communication interface, it supports remote sensing, adjustment, control, and signaling, meeting the requirements of modern automated power grids.
We continually evolve our product line, preparing for the next generation of smart, highly integrated DC grid protection systems.
We are investing in wide-bandgap semiconductor devices (SiC and GaN) to develop hybrid and solid-state DC breakers. These technologies achieve microsecond trip speeds, effectively eliminating mechanical wear.
Future releases will feature built-in Modbus RTU, Modbus TCP/IP, and CAN bus protocols. These features enable operators to monitor contact wear, internal temperatures, and real-time current loads remotely.
By processing transient current profiles at the edge, our upcoming smart breakers can detect insulation faults and micro-arcs before they trigger a full-scale short circuit.
A reliable supplier helps you establish your brand. We support our partners with customized options, responsive support, and scalable production capacities.
We apply your brand identity with customized laser engraving and high-resolution logo prints. By using high-quality raw materials, we help you build a premium brand reputation in your target markets.
We supply full manufacturing support for partners with existing drawings or specific electrical requirements, utilizing our advanced facilities and rigorous QC systems.
Leverage our seasoned engineering team to design custom circuit protection systems from scratch, tailoring electrical characteristics and dimensions to your application.
Read our technical FAQ for insights on DC circuit protection, compliance, and field installation practices.
We work with global distributors, EPC contractors, and solar equipment manufacturers, delivering reliable, high-performance DC protection solutions.
Contact Our Engineering TeamExplore our high-breaking capacity MCCBs, undervoltage releases, and large-frame air circuit breakers engineered for high-demand industrial systems.
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