Fully compliant with GS IEC 60898-1 standards. Precision bimetallic thermal overload and fast-acting magnetic short-circuit mechanisms manufactured by Wenzhou OFA Electrical Technology Co., Ltd.
An in-depth engineering assessment of distribution challenges, tropicalized component design, and OEM supply chain integration serving Ghanaian importers, contractors, and public infrastructure projects.
Electrical power distribution across Ghana—managed by the Electricity Company of Ghana (ECG), Northern Electricity Distribution Company (NEDCo), and Ghana Grid Company (GRIDCo)—presents severe operational stresses for low-voltage switchgear. Systemic voltage transients, ambient relative humidity reaching 90% in coastal sectors like Accra and Tema, and sustained ambient temperatures above 40°C in outdoor switchboards create high risks of thermal derating and premature insulation breakdown.
Furthermore, under Ghana's rapid industrial expansion—driven by the "One District, One Factory" (1D1F) initiative and massive investments in commercial real estate—distribution networks experience frequent inductive switching surges, transient overvoltages, and localized harmonic distortions. Standard off-the-shelf Miniature Circuit Breakers (MCBs) manufactured for mild European or Asian climates often suffer from nuisance tripping or failure to clear high-current fault events under tropical operating conditions.
Engineering Insight: Standard MCBs calibrated at a reference ambient temperature of 30°C will trip prematurely in West Africa when panel enclosures routinely reach 45°C–50°C. The OFL7 Series utilizes custom bimetallic calibration coefficients specifically rated for tropical derating curves (40°C base calibration), eliminating false tripping while providing instantaneous magnetic protection during solid short circuits.
Designed in Yueqing—the low-voltage electrical capital of China—the OFL7 series integrates superior materials with precision automated assembly.
The OFL7 MCB features an engineered 12-plate arc split chamber constructed from de-ionized steel plates. During high-magnitude short circuits (up to 10kA according to GS IEC 60898-1), the arc is rapidly split, lengthened, and cooled within milliseconds, limiting total let-through energy ($I^2t$) to protect downstream copper cabling.
Equipped with high-purity silver cadmium oxide (AgCdO) or silver tin oxide (AgSnO2) contact tips, the OFL7 Series delivers low contact resistance (<0.5 mΩ) and outstanding anti-welding properties during severe fault conditions, ensuring over 10,000 mechanical operations and 4,000 electrical duty cycles.
Molded from virgin polyamide PA66 compound, the breaker casing exhibits high tracking resistance (CTI > 175V) and flame retardancy matching UL94-V0. It resists thermal deformation up to 125°C, making it immune to fire hazards caused by loose terminal connections or extreme overloads.
| Specification Parameter | OFL7 Standard Residential | OFL7-H Industrial Grade | OFL7-DC Solar PV Application |
|---|---|---|---|
| Standard Compliance | GS IEC 60898-1 / EN 60898-1 | GS IEC 60947-2 / EN 60947-2 | IEC 60947-2 / EN 60947-2 (PV) |
| Number of Poles | 1P, 2P, 3P, 4P | 1P, 2P, 3P, 4P | 1P, 2P, 3P, 4P |
| Rated Current ($I_n$) | 1A, 2A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A | 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, 100A, 125A | 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A |
| Rated Voltage ($U_e$) | AC 230V/400V (50/60Hz) | AC 240V/415V (50/60Hz) | DC 250V (1P), DC 500V (2P), DC 1000V (4P) |
| Breaking Capacity ($I_{cn}$) | 6,000A (6kA) | 10,000A (10kA) | 6,000A (6kA DC) |
| Tripping Characteristics | B Curve (3-5 $I_n$), C Curve (5-10 $I_n$) | C Curve (5-10 $I_n$), D Curve (10-14 $I_n$) | K Curve / PV Specific DC Characteristics |
| Tropicalization (IEC 60068-1) | Execution 2 (55°C at 95% RH) | Execution 2 (55°C at 95% RH) | Execution 2 (55°C at 95% RH) |
| Terminal Connection | Tunnel terminal for wire up to 25mm² | Tunnel terminal for wire up to 35mm² | Tunnel terminal for wire up to 25mm² |
Your Direct Manufacturing Partner in Yueqing, Wenzhou — Delivering Tax Credit Grade A Reliability & OEM Expertise to Ghana.
Founded in 2013, Wenzhou OFA Electrical Technology Co., Ltd. operates state-of-the-art production facilities in Yueqing, Wenzhou—the acknowledged epicenter of China's electrical apparatus industry. We specialize in distribution switchgear, control equipment, and terminal circuit protection components including MCBs, MCCBs, ACBs, RCCBs, and RCBOs.
Unlike trading intermediaries, OFA controls every tier of the manufacturing process: from raw material inspection of copper components and silver contact point plating to automated magnetic calibration, ultrasonic housing welding, and 100% automated trip testing before packing. We maintain full ISO9001 Quality Management certification and strictly comply with international standards including CE, CB, and IEC guidelines.
Deploying robust electrical protection across commercial real estate, manufacturing enclaves, mining operations, and solar mini-grids.
Heavy manufacturing units, plastics factories, and food processing plants in Tema require circuit breakers that withstand intense inductive motor start-up currents. OFA's D-Curve OFL7 MCBs and OFM1 Series Molded Case Circuit Breakers (MCCB) prevent unnecessary tripping during motor inrush currents while safeguarding distribution lines against phase-to-phase short circuits.
Modern high-rise commercial structures and retail centers in Accra’s Airport City and Ridge financial district demand uninterrupted power and human safety. OFL7 Series 1P/3P MCBs combined with OFAP6-AC Residual Current Circuit Breakers (RCCB) provide complete fire and electrocution protection compliant with modern municipal building codes.
With Ghana’s renewable energy targets promoting solar microgrids in the Northern, Upper East, and Upper West regions, DC-specific protection is vital. OFBLT 3P DC Molded Case Breakers and specialized OFL7 DC isolators safeguard battery energy storage systems (BESS) and inverter combiner boxes against direct current reverse arcs.
Gold and mineral extraction plants around Tarkwa and Prestea present harsh environments with chemical fumes, dust, and heavy mechanical vibration. OFA’s IP65-rated waterproof enclosures paired with high-breaking capacity OF10KA breaker units protect critical pumping and ventilation systems from catastrophic line faults.
Rapid urbanization in Kumasi and Takoradi calls for affordable yet safe consumer units. OFL7 1P+N RCBOs combine earth leakage and overload protection into a compact 18mm module, maximizing distribution board space while maintaining compliance with Ghana Standards Authority guidelines.
Cocoa processing plants and cashew processing facilities across central Ghana utilize automated sorting and drying machinery. Stable power supply protected by OFA’s IS Series isolating switches ensures safe maintenance lock-out / tag-out (LOTO) procedures for service technicians.
Discover how international system integrators, plant engineers, and electrical importers evaluate OFA's manufacturing and delivery consistency.
"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 and MCBs to upgrade the power distribution system in our 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 management solutions and protection gear for several commercial buildings was a wise decision. The system helped us gain detailed insights into electricity usage. Their export support team is highly responsive to technical queries."
Essential guidance for electrical equipment buyers, contractors, and importers serving the Ghanaian market.
Explore our broader range of molded case circuit breakers, residual current devices, and specialized protection equipment built for high reliability.
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