Explore our flagship low-voltage protection units manufactured under strict ISO9001 and international IEC safety standards.
Founded in 2013, Wenzhou OFA Electrical Technology Co., Ltd. is a premier manufacturer and global enterprise specializing in low-voltage distribution switchgear, protective relays, and control equipment. Located in Yueqing, Wenzhou—widely recognized as the Capital of Electrical Appliances in China—OFA has established itself as an authoritative OEM/ODM partner and direct vendor for high-performance electrical architecture across 50+ countries.
Driving continuous progress in power distribution and control technology, OFA operates under its proprietary brand "OFA". Our comprehensive production matrix covers industrial automation systems, commercial real estate power grids, renewable utility integration (Solar PV & Energy Storage Systems), and heavy industrial machinery. Adhering strictly to ISO9001 management criteria, OFA delivers uncompromised reliability, precision thermal performance, and robust short-circuit breaking capability to partners worldwide.
In modern industrial and commercial electrical infrastructure, the 2000A Air Circuit Breaker (ACB 2000A) acts as the central line defense guard. Positioned in primary main switchboards (MSB) or low-voltage substations, a 2000A ACB controls, protects, and isolates electrical power circuits operating at heavy continuous loads up to 2000 Amperes.
When sourcing 2000A ACBs from China suppliers, electrical design engineers and system integrators evaluate several core technical dimensions to guarantee system selectivity, thermal dissipation efficiency, and dynamic fault withstand capacity.
Engineered for high short-circuit stress environments, top-tier China 2000A ACBs offer Ultimate Short-Circuit Breaking Capacities ($I_{cu}$) of up to 65kA to 85kA at 415V AC. Rated Service Breaking Capacity ($I_{cs}$) matches 100% $I_{cu}$, guaranteeing complete protection without physical contact welding or housing structural degradation during fault clearing.
Equipped with digital controller units (MCU), the ACB 2000A supports LSIG protection: Long-time delay (Overload), Short-time delay (Short-circuit), Instantaneous trip, and Ground Fault Protection. Real-time LCD interfaces display phase currents, voltage waveforms, fault logs, and harmonics diagnostics.
Available in 3-Pole (3P) and 4-Pole (4P) configurations, with both Draw-out type (with cradle/chassis for fast maintenance racking) and Fixed type formats. Interlocking mechanics prevent hazardous racking operations while contacts are closed.
| Electrical Parameter | Standard Range / Specification Value | Engineering Significance |
|---|---|---|
| Rated Current ($I_n$) | 2000A (Frame Size 2000A) | Maximum continuous current capacity at 40°C ambient temperature. |
| Rated Operational Voltage ($U_e$) | AC 400V / 415V / 690V (50/60 Hz) | Compatible with standard industrial grids and renewable PV step-up systems. |
| Rated Insulation Voltage ($U_i$) | 1000V AC | Ensures safe isolation between phase contacts during maintenance shutdowns. |
| Rated Impulse Withstand Voltage ($U_{imp}$) | 12 kV | Provides high protection against atmospheric lightning surges and switching transients. |
| Short-time Withstand Current ($I_{cw}$) | 50kA / 65kA (for 1 second) | Enables full downstream discrimination/selectivity, preventing total blackout. |
| Mechanical Life (Cycles) | 15,000 to 20,000 Operations | Long term operational lifetime with minimal contact mechanical wear. |
| Communication Protocols | Modbus-RTU, Profibus-DP, Ethernet/IP | Seamless integration into SCADA, Smart Building BMS, and Industrial IoT platforms. |
The versatility of the 2000A Air Circuit Breaker allows it to function as the core energy controller across high-demand industrial, commercial, and utility infrastructure settings. Here is how specialized engineering adapts the 2000A ACB for localized application environments:
In Tier III and Tier IV Hyperscale Data Centers, uninterruptible power is non-negotiable. 2000A ACBs serve as incoming breaker switches on main distribution boards, interfacing directly with Diesel Generators and static ATS systems. Utilizing dual-bus tie drawout configurations, operators can service breakers without interrupting power to server racks.
Utility-scale solar farms and battery energy storage system containers require ACBs customized for high ambient temperatures and bi-directional current flow. China 2000A ACB suppliers deliver specialized low-temperature-rise contacts and 690V/800V rated models capable of handling severe harmonic distortion from central solar inverters.
Continuous industrial processing units—such as steel mills, automotive assembly plants, and refineries—subject switchgear to harsh atmospheres, dust, and dynamic thermal shocks. 2000A ACBs featuring tropicalized insulation treatment, dust-proof shrouds, and heavy-duty arc chutes ensure uninterrupted operations under harsh factory environments.
Large commercial complexes, shopping malls, and healthcare facilities utilize 2000A ACBs paired with zone selective interlocking (ZSI). ZSI allows instant clearing of local faults at the branch level without tripping the upstream main 2000A breaker, localizing outages and keeping essential hospital infrastructure powered.
The global transition toward decarbonization, microgrids, and digitized power distribution is re-shaping circuit breaker technology. China’s electrical manufacturing sector, led by innovative producers like OFA, is actively advancing the technological frontier of 2000A Air Circuit Breakers across three core domains:
Next-generation 2000A ACBs are shifting from reactive tripping to active protection. Embedded temperature sensors at primary contact fingers continuously stream real-time thermal readings to edge controllers. Algorithms calculate contact wear percentages based on cumulative interrupted fault currents ($I^2t$), allowing facility managers to perform scheduled maintenance before catastrophic equipment failure occurs.
Traditional mechanical opening times average between 20ms to 40ms. Research and development teams are integrating solid-state semiconductor assist switches into 2000A breaker frames, reducing fault interruption times to under 5ms. This rapid interruption limits arc energy dramatically, minimizing arc flash hazards for maintenance operators.
In response to global carbon neutrality goals (ESG compliance), future ACB production phases out halogenated flame retardants and heavy metals. Enclosures are fabricated from fully recyclable high-density thermoplastic resin, while green manufacturing facilities operate on clean solar energy with zero carbon offset footprints.
Global procurement specialists, EPC contractors, and OEM distributors increasingly turn to China for 2000A Air Circuit Breakers due to unmatched supply chain density, rapid scale capability, and cost-efficiency. Wenzhou OFA Electrical Technology Co., Ltd. demonstrates these strategic industrial advantages:
Situated in Yueqing, Wenzhou—the core hub of China's electrical device manufacturing—OFA relies on a localized 30-minute supply chain radius. Raw materials (electrolytic copper, silver alloy contacts, BMC arc chutes, precision spring mechanisms) are sourced instantly, reducing lead times from months to days.
Upholding honest operations, Wenzhou OFA Electrical Technology Co., Ltd. has earned a Tax Credit Grade A rating for 7 consecutive years. Production lines follow strict ISO9001 quality systems, featuring 100% full-process type testing, contact resistance verification, calibration of thermal-magnetic releases, and dynamic mechanical trip testing.
Whether partners require special voltage coil ratings (AC230V, AC400V, DC110V, DC220V), custom terminal busbar drillings, specific brand labeling, or personalized micro-processor trip software settings, OFA’s engineering team offers end-to-end prototyping and agile manufacturing scalability.
Navigating international regulatory frameworks is essential for seamless power switchgear integration across Europe, North America, Southeast Asia, the Middle East, and Latin America. China Air Circuit Breaker 2000A suppliers must provide comprehensive compliance backing to support global EPC engineering firms.
OFA’s complete breaker product lines comply strictly with key global standards, including IEC / EN 60947-2 (Low-voltage switchgear and controlgear - Circuit-breakers), CE directives, and CCC mandatory certification. Test reports from accredited third-party laboratories (KEMA, CEBEC, TUV) are accessible for tender submittals.
From initial design proposal phase (CAD layout drawings, selective tripping curves, busbar thermal calculations) to post-installation troubleshooting, OFA provides global engineering consultation via remote video inspection, clear multi-language manuals, and rapid spare-part dispatch.
In addition to 2000A Air Circuit Breakers, Wenzhou OFA Electrical Technology Co., Ltd. designs and manufactures a complete spectrum of circuit protection components:
Designed to make, carry, and break currents under normal conditions, and interrupt short circuits or overloads up to 1600A. Features adjustable thermal-magnetic releases and electronic trip units.
Series: BA88, DCM1, DCOF1, OFM1, OFBLT, OF1, OFA-M1
Compact protection guardians for commercial distribution boards and sub-circuits (1A to 125A). Provides DIN-rail installation, high breaking capacity up to 10kA, and fast clearing response.
Series: OF6KA, OF10KA C65, OFAFT, OFD4Z7, OFDL, OFDP, OFDZ47, OFEU, OFKL, OFKL-NXB, OFL7, OFL8, OFNC, OFPF, OFP
Intelligent main breaker units for power incoming panels, offer deep digital monitoring, flexible expansion, and high short-time withstand ($I_{cw}$) for selective power networks.
Series: OFW1 Intelligent Universal Circuit Breaker (Up to 6300A Frame)
Specialized earth leakage protection units designed to trip rapidly upon sensing lethal ground fault currents, safeguarding human lives against electric shocks.
Series: OFAP6-AC, OFDPN, OFDX, OFGX, OFID, OFL7, OFPM
All-in-one integrated space-saving units combining overload, short-circuit protection, and earth leakage detection within a single modular housing.
Series: OFC, OFKL-80A, NB1L, OFMIN, OFOM, OFR1
Combines complete protective functions of circuit breakers with reliable positive contact position isolation for safe electrical maintenance access.
Series: OFIS-125A, OFIS-BH, OFIS-DS
Discover why system integrators, plant managers, and facility owners rely on OFA for critical power projects:
“As a system integrator, our company has collaborated with OFA on several industrial automation projects. Their product range is quite comprehensive, covering everything from protective relays to communication gateways, which simplifies our procurement and integration work. The product quality is consistent, reducing on-site commissioning hassles.”
“We purchased OFA's intelligent power monitoring devices to upgrade the power distribution system in our old workshop. The installation and setup were simpler than expected, and integration went smoothly. Most importantly, they have been running very stably for over a year.”
“Deploying OFA's energy efficiency management system for several office buildings we manage was a wise decision. The system helped us gain detailed insights into electricity usage in different areas and achieve energy savings through optimized operational strategies.”
“Our PV project required reliable communication management and data acquisition equipment. OFA's products met our core needs at a reasonable price and could adapt to our local outdoor environment. Their engineers provided excellent configuration guidance via email and video calls.”
Get clear, expert answers regarding China Air Circuit Breaker 2000A sourcing, customization, and factory operations.
A: While both devices protect electrical circuits, an ACB 2000A is built on an open metal frame architecture offering higher short-time withstand current ratings ($I_{cw}$), higher breaking capacities (up to 85kA+), and advanced microprocessor trip units with selective timing controls. ACBs are used primarily in main low-voltage switchboards. MCCBs are generally molded plastic units with fixed thermal-magnetic or basic electronic releases, typically utilized in sub-distribution panels.
A: OFA is a specialized technology enterprise focused on integrated power automation and energy efficiency management solutions. Founded in 2013 and based in Yueqing, Wenzhou, we provide end-to-end electrical solutions—from intelligent hardware (MCB, MCCB, ACB, RCCB, RCBO) and edge control devices to cloud management platforms.
A: Yes. We offer flexible customization capabilities. Based on our self-developed platform, we provide tailored solutions for shunt release operating voltages, under-voltage trip modules, auxiliary contact configurations, communication protocol integration (Modbus-RTU, Ethernet), brand branding, and custom terminal busbar connection kits.
A: Our core products are designed, tested, and certified to international standards such as CE, IEC 60947-2, IEC 60898-1, and CCC. Our manufacturing facilities operate strictly under ISO9001 quality management system protocols, featuring 100% full-inspection SOPs before factory dispatch.
A: We provide complete end-to-end support: technical solution design and CAD drawings before procurement; clear installation documentation and video support during implementation; and online ticketing with remote diagnostic assistance post-project. We accept T/T payment terms and coordinate sea freight, air freight, or express dispatch through reliable global shipping partners.
A: For standard configuration ACBs and MCCBs, we maintain flexible low-MOQ policies. Lead times for standard units range from 7 to 15 days, while customized high-volume OEM orders are scheduled based on production milestones, ensuring fast project turnarounds.
Discover our specialized DC solar circuit breakers, high-capacity MCCBs, and residual current devices available directly from our Wenzhou factory.
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