Engineered for high short-circuit breaking capacity, tropicalized climate endurance, and absolute reliability.
Sri Lanka's economic evolution and industrial modernization demand robust, uninterruptible power distribution architecture. Under the oversight of the Ceylon Electricity Board (CEB) and the Lanka Electricity Company (LECO), the nation's electrical infrastructure is transitioning toward smart grid readiness and higher power density.
Industrial complexes across key zones—such as the Katunayake Export Processing Zone, Biyagama Export Processing Zone, and heavy engineering facilities in Colombo Port City—require high-capacity switchgear equipped with Air Circuit Breakers (ACBs) that can withstand demanding operational environments.
As a leading ACB Factory and Supplier located in Yueqing, Wenzhou—China's capital of electrical appliances—Wenzhou OFA Electrical Technology Co., Ltd. supplies high-performance intelligent ACBs, MCCBs, and protection devices tailored specifically to Sri Lanka's climatic and technical conditions.
Comprehensive protection and real-time power analytics for low-voltage main distribution boards (MDBs).
OFA's intelligent ACBs feature full-spectrum electronic trip units offering LSIG protection (Long time overload, Short time short-circuit, Instantaneous short-circuit, and Ground fault). Built-in LCD displays allow fine-tuned parameter settings and fault-log memory retrieval.
Designed for demanding grid conditions, OFA ACBs achieve Ultimate Short-Circuit Breaking Capacity (Icu) up to 85kA at 415V AC, with Service Short-Circuit Breaking Capacity (Ics) = 100% Icu, guaranteeing structural integrity after tripping under severe short-circuit events.
Equipped with RS485 communication interfaces supporting standard Modbus RTU protocols. Enables seamless integration with SCADA systems, building management platforms (BMS), and remote energy monitoring platforms across industrial facilities in Sri Lanka.
| Parameter | Frame 1600 | Frame 3200 | Frame 4000 | Frame 6300 |
|---|---|---|---|---|
| Rated Current In (A) | 200A - 1600A | 2000A - 3200A | 3200A - 4000A | 4000A - 6300A |
| Rated Voltage Ue (V) | AC 400V / 415V / 690V (50Hz / 60Hz) | |||
| Ultimate Breaking Capacity Icu (kA) | 50kA / 65kA | 80kA / 100kA | 100kA | 120kA |
| Short-time Withstand Current Icw (1s) | 42kA | 65kA | 85kA | 100kA |
| Compliance Standards | IEC 60947-2, GB/T 14048.2, CE Certified | |||
Customized power protection for manufacturing hubs, commercial real estate, solar farms, and infrastructure.
Sri Lanka's world-renowned apparel exporters require zero electrical downtime. OFA ACBs integrated into main distribution switchboards protect automated sewing, dyeing, and spinning equipment from voltage surges, phase imbalances, and motor-stalling overcurrents.
With Sri Lanka rapidly expanding solar rooftop installations and solar parks in Hambantota and Kilinochchi, OFA supplies high-voltage DC circuit breakers (such as the BLTM3DC Series) and AC ACBs for central inverter stations, supporting stable grid integration.
Luxury resort hotels along the Bentota coast and high-rise commercial towers in Colombo Port City rely on OFA draw-out type ACBs for ease of maintenance, compact footprint, and seamless automatic transfer switch (ATS) coupling with backup diesel generators.
Substation infrastructure in maritime terminals requires high mechanical endurance. OFA ACBs undergo rigorous 20,000-cycle mechanical life testing, ensuring long-lasting performance under frequent switching conditions.
Founded in 2013 in Yueqing, Wenzhou—the world epicenter of low-voltage electrical manufacturing—Wenzhou OFA Electrical Technology Co., Ltd. combines engineering innovation, automated assembly lines, and rigorous quality control.
We provide OEM and ODM solutions to electrical switchboard builders, EPC contractors, and importers serving Sri Lanka and over 100 countries globally.
Driving the continuous progress of power distribution and control technology.
Wenzhou OFA Electrical Technology Co., Ltd. is one of the professional suppliers of distribution switchgear and control equipment in China. Founded in 2013, the company is rooted in Yueqing, Wenzhou — the Capital of Electrical Appliances in China. It owns independent brands such as "OFA", and its products cover multiple industries and applications including power, energy, industrial automation, construction and equipment manufacturing.
We are committed to enabling power systems to operate safer and smarter through products and services that integrate industry best practices, independent R&D and strict quality control. Based on over a decade of industry accumulation and thousands of successful deliveries, our customer retention rate has consistently remained at a high level.
Transitioning from passive protection to intelligent predictive maintenance in South Asia.
Integration of multi-core DSP chips inside ACB trip units, featuring accurate harmonic analysis up to the 31st order, residual current measurement, and real-time waveform capture during fault events.
Connecting ACBs with IoT gateways allows continuous monitoring of contact temperature rise, mechanical operating cycles, and insulation degradation, predicting maintenance requirements before outages occur.
Optimized high-speed transfer mechanisms and bidirectionally rated AC/DC breakers designed specifically for hybrid microgrids incorporating solar energy, battery storage (BESS), and traditional grid input.
See why global industry leaders and regional integrators rely on OFA electrical protection equipment.
"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, simplifying our procurement and integration work."
"We purchased OFA's intelligent power monitoring devices to upgrade the power distribution system in our workshop. The installation and setup went smoothly. Most importantly, they have been running very stably for over a year."
"Our solar energy project required reliable data acquisition and circuit protection equipment. OFA's products met our core technical needs at a reasonable price and adapted flawlessly to local outdoor conditions."
Detailed engineering answers for importers, panel builders, EPCs, and facility managers.
From High-Performance DC Molded Case Circuit Breakers to Advanced Earth Leakage Protection (RCCB/RCBO).
Comprehensive low voltage catalog for electrical distributors in Sri Lanka.
Partner with Wenzhou OFA Electrical Technology Co., Ltd. for direct factory pricing, ISO9001 certified quality control, customized OEM configurations, and dependable delivery to Sri Lanka.
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