Premium Air Circuit Breaker Manufacturer Since 1989
HUYU Electric is a national high-tech enterprise and strategic partner of Eaton, specializing in the R&D and manufacturing of air circuit breakers (ACB) from 200A up to 6300A.
Our ACB product lines — including the HUW9 and EXW3 series — deliver intelligent protection, real-time monitoring, and seamless integration with BMS, PLC, and SCADA systems.
With 35+ years of experience, CNAS-accredited lab, and IEC/CE/UL certifications, we provide reliable, cost-effective power distribution solutions for industrial, commercial, and infrastructure projects worldwide.
ACB 200A – 6300A · Eaton Strategic Partner
In Close Collaboration with Eaton
In close collaboration with Eaton, HUYU leverages shared R&D capabilities and intelligent manufacturing to bring reliable, innovative low-voltage products to the global market.
Explore Our ACB Breaker Range
From 200A to 6300A air circuit breakers with intelligent control and communication, to miniature circuit breakers for branch protection — our factory produces a full spectrum of certified low-voltage protection solutions for residential, commercial, and industrial applications.
ACB Air Circuit Breakers — 200A to 6300A
Two intelligent ACB series for low-voltage power distribution — the EXW3 (400A–6300A, 85–125kA Icu) and the HUW9 (200A–6300A, six frame sizes) — with intelligent protection, communication and fixed or withdrawable installation.
Both series feature intelligent controllers with programmable protection, real-time monitoring, fault recording and communication interfaces for BMS, PLC and SCADA integration. Modular, field-replaceable components keep downtime and lifetime maintenance costs low.
- 85–125kA Icu — high fault-level breaking at 400/415V for main switchboard duty.
- Up to 690V AC — suitable for industrial and marine applications.
- Intelligent controller — programmable overload, short-circuit, earth fault and phase-imbalance protection.
- Fixed & withdrawable — rack-out maintenance without de-energising the busbar.
- Communication ready — Modbus, Profibus or Ethernet for BMS and SCADA.
- Factory-direct OEM/ODM — private labelling, full documentation and project-based support.
Specifications — EXW3 vs HUW9
| Parameter | EXW3 | HUW9 |
|---|---|---|
| Rated Current | 400A – 6300A | 200A – 6300A |
| Frame Sizes | 3 (2000 / 4000 / 6300) | 6 (1600 / 2000 / 2500 / 3200 / 4000 / 6300) |
| Rated Voltage | Up to AC 690V | Up to AC 690V |
| Breaking Capacity Icu | 85 – 125kA (400/415V) · 50 – 100kA (440/690V) | 50 – 120kA (400V) · 35 – 85kA (690V) |
| Icw / 1s (400/415V) | 65 – 125kA | — |
| Poles | 3P / 4P | 3P / 4P |
| Insulation Voltage Ui | AC 1000V | AC 1000V |
| Impulse Withstand Uimp | 12kV | 12kV |
| Breaking Time | ≤ 30ms | ≤ 30ms |
| Protection | Overload, short circuit, earth fault, phase imbalance | Overload, short circuit, undervoltage + selective coordination |
| Installation | Fixed / Withdrawable | Fixed / Draw-out (6300A draw-out only) |
| Communication | Modbus / Profibus / Ethernet | BMS / PLC / SCADA interface |
| Standards | IEC compliant | IEC compliant |
Walk Through Our Factory & Production Lines
From in-house mold development to certified mass production, every step of our manufacturing is controlled in our own facilities. With automated injection molding, precision contact manufacturing and strict quality control, we produce wall switches, sockets and electrical accessories for brands, agents and wholesale partners worldwide.
In-House Mold Center
All molds are designed and built in-house, giving us full control over quality, lead time and cost. Self-developed tooling enables exclusive designs and faster product development for OEM partners.
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Injection Molding Workshop
Automated injection molding bases run around the clock with consistent process control, delivering stable and scalable mass production for high-volume orders.
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Copper & Silver Components
Contacts and rivets are manufactured in-house with high-speed punch presses. Self-made copper and silver components ensure consistent conductivity and contact performance in every switch and socket.
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OEM / ODM / Agency Supply
Flexible MOQs and full customization for global partners — from panel color and logo to complete product design, packaging and documentation, all supported by a dedicated account team.
Learn More →Ready to Flip the Switch on a Powerful Partnership?
From first sketch to final shipment, we’re here to power your projects. OEM, ODM, wholesale and distributor programs with factory-direct quality — reach out today and let’s turn your vision into reality.
Built Around Your Business
From OEM branding to wholesale supply and distributor programs, we support brands and buyers worldwide with factory-direct quality.
OEM / ODM
Factory-DirectCustom branding, packaging and product variants built on our standard platforms — from a panel logo to full product design.
Laser-etched logo · Custom packaging · Full test docs
Wholesale Supply
Volume PricingFactory pricing with a one-container MOQ and reliable global shipping for volume buyers and importers.
20GP MOQ · Mixed models · Global shipping
Distributor Support
Channel PartnersDedicated account management, marketing material and priority production for distributors and project clients.
Account manager · Sales material · Priority lead times
Premium ACB Manufacturer — 200–6300A for Industrial & Commercial Projects
HUYU Electric, a national high-tech enterprise and strategic partner of Eaton since 1989, manufactures premium air circuit breakers (ACB) from 200A up to 6300A. Our HUW9 and EXW3 series deliver intelligent protection, real-time monitoring, and seamless BMS/PLC/SCADA integration for industrial plants, data centers, and critical infrastructure.
Trusted by 500+ product certifications and a CNAS-accredited lab, our ACBs offer 85–125kA breaking capacity, fixed or withdrawable installation, and optional communication protocols. Partner with a factory-direct manufacturer for OEM/ODM, competitive wholesale pricing, and full technical documentation — all backed by 35+ years of engineering excellence.
Reliable ACB Protection for Industrial & Commercial Power Systems
HUYU Electric’s ACB air circuit breakers are engineered to protect low-voltage distribution networks in demanding environments — from heavy industrial plants and data centers to commercial buildings and infrastructure projects. Rated from 200A up to 6300A with intelligent trip units for overload, short-circuit, and earth fault protection.
Designed with advanced arc-quenching technology and optional communication interfaces (Modbus, Profibus, Ethernet), our ACBs integrate seamlessly with BMS, PLC, and SCADA systems for remote monitoring and control. Available in fixed or withdrawable versions, with IEC/CE/UL certifications and factory-direct OEM/ODM support.
Certifications & Trusted Partners
Our products are backed by internationally recognized certifications and testing reports, and our brand is trusted by leading partners across the electrical industry.
Product Certifications
Our Partners
Intelligent Power Distribution Solutions for Every Industry
From industrial plants to commercial data centers and renewable energy systems, HUYU Electric delivers certified ACB solutions that combine intelligent protection, real-time monitoring, and seamless system integration — backed by 35+ years of manufacturing expertise.
Industrial & Infrastructure Power Distribution.
Commercial & Data Center Solutions.
Renewable Energy & Smart Grid.
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Our Global Partners
TRUSTED BY INDUSTRY LEADERS.
From OEM manufacturers to project contractors, we deliver reliable ACB solutions that power businesses worldwide.
Featured Projects
From iconic hotels and airports to hydropower stations and railway hubs, Huyu Electric’s low-voltage solutions keep critical infrastructure running worldwide.
Powering the Marina Bay Sands Hotel
High load capacity, maximum reliability and intelligent management for a world-class integrated resort’s critical infrastructure.
View Project →Residential Solutions for One Park, Cambodia
A full residential distribution suite for a premier mixed-use development in Phnom Penh City Center.
View Project →Powering the Myanmar-Yangon International Airport
A comprehensive range of low-voltage solutions for 24/7 stable operation of a national aviation gateway.
View Project →Renewable Energy Solutions for Armenian Hydropower Station
Core low-voltage protection and control systems operating with outstanding stability in harsh environments.
View Project →Connecting the Steppes — Ulaanbaatar Central Railway Station
High-durability low-voltage components keeping the Trans-Mongolian Railway hub running in extreme cold.
View Project →Contact us to get a free quote and more expertise about ACB circuit breakers
Your project will meet a right solution with Huyu Electric. From standard ACB to customized protection solutions, we deliver reliable performance and professional support.
ACB Customization Made Easy
Follow the 3 steps to get started today
Tell Us What You Need
Share your specific requirements — rated current, breaking capacity, voltage level, or reference drawings. The more details you provide, the better we can tailor the solution.
Get Solution & Quote
Our engineering team will analyze your needs and propose the optimal ACB configuration. A detailed quote with technical specifications will be provided within 24 hours.
Approve for Mass Production
After your approval and deposit, we will proceed with production. Every unit undergoes rigorous testing to ensure compliance with IEC and UL standards before shipment.