Engineered Medium-Voltage (MV) power distribution boards, metal-clad cabinets, and ring main units (RMUs) designed to withstand Guinea's harsh sub-Saharan tropical climates and demanding heavy industries.
Send Inquiry NowHighly customized, type-tested, and optimized medium voltage switchgear configurations tailored for critical substations, mines, and industrial sites across Conakry, Boké, and Kamsar.
Guinea’s electrical infrastructure is undergoing a massive transformation. Rapid developments in the bauxite mining sector (with Guinea hosting the world's largest reserves in regions like Boké, Kindia, and Faranah), combined with major national grid expansions by Electricité de Guinée (EDG), have generated high demand for highly resilient Medium-Voltage (MV) switchgear. High-voltage distribution lines connecting large hydropower stations, such as the Kaléta (240 MW) and Souapiti (450 MW) dams, require switchgear systems that ensure maximum uptime and zero-fault operation under severe ambient conditions.
Power distribution in Guinea faces unique geographic and climatic bottlenecks. Heavy tropical rainfall, extreme relative humidity (often exceeding 90% during wet seasons), coastal salt fog near Conakry port and Kamsar, and dry, dust-laden Harmattan winds in northeastern regions threaten electrical insulation. In such environments, standard outdoor switchgear is prone to partial discharges, tracking, and premature metal oxidation. Therefore, selecting high-performance, tropicalized Air-Insulated Switchgear (AIS) designed to international standards (IEC 62271-200) is critical for commercial and industrial operations.
Equipped with internal space heaters, high-performance epoxy resin casting components, and corrosion-resistant zinc-plated metal enclosures to prevent condensation-induced dielectric breakdown in high-humidity zones.
Engineered to handle severe load fluctuations and high-dust environments typical of open-pit bauxite mines, processing plants, and port loading facilities in Boké and Kamsar.
Fully compliant with Electricité de Guinée (EDG) single-line diagrams, substation automation systems, and rural electrification initiatives operating at 10kV, 20kV, 24kV, and 33kV.
As a global electric infrastructure partner, Zhejiang Zeno Electric Co., Ltd. offers customized medium-voltage switchgear portfolios tailored to meet the challenges of regional sub-grids in West Africa. Global engineering contractors (EPCs) and local mining conglomerates require high reliability, predictable maintenance schedules, and standard modular components to facilitate rapid replacement and scaling.
Procurement directors sourcing MV equipment for African deployments focus on risk mitigation. Technical evaluations demand complete Type Test Reports validating internal arc classification (IAC AFLR), mechanical endurance classes (M2), and electrical endurance categories (E2). Our AIS designs conform fully to standard IEC directives and are fabricated using precision components to resist voltage surges, short circuits, and mechanical stress.
| Technical Parameter | 12kV AIS Solutions | 24kV AIS Solutions | 36kV / 40.5kV AIS Solutions |
|---|---|---|---|
| Rated Voltage (Ur) | 12 kV | 24 kV | 36 kV / 40.5 kV |
| Rated Current (Ir) | 630 A - 3150 A | 630 A - 2500 A | 1250 A - 3150 A |
| Short-time Withstand Current (Ik) | 20 kA / 25 kA / 31.5 kA | 20 kA / 25 kA | 25 kA / 31.5 kA |
| Power Frequency Withstand Voltage | 42 kV (Common) / 48 kV (Isolator) | 50 kV / 65 kV | 70 kV / 80 kV |
| Lightning Impulse Withstand Voltage (BIL) | 75 kV (Common) / 85 kV (Isolator) | 125 kV / 145 kV | 170 kV / 185 kV |
| Standard Protection Degree | IP4X (Enclosure) / IP2X (Between Compartments) | IP4X | IP4X / IP54 (Customized) |
Zhejiang Zeno Electric Co., Ltd. is a national high-tech enterprise located in Ningbo, China, with a registered capital of 52 million yuan. The company integrates the research and development (R&D), manufacturing, sales, and service of advanced power distribution equipment and integrated energy systems.
Rooted in Ningbo and supported by a strong engineering and technical team, Zeno Electric has steadily expanded its footprint across global markets. Through continuous innovation and quality-driven development, the company has become a trusted partner in the electrical transmission and utility industry, offering safe, smart, and efficient energy solutions designed to accelerate the digitalized transition of energy networks worldwide.
We specialize in manufacturing complete primary and secondary distribution systems. Our production capabilities include:
Additionally, we undertake turnkey power projects up to 220kV, delivering seamless operations from initial design to site commissioning, lowering engineering costs for developers.
Under strict ISO 9001 and ISO 14001 Quality Management standards, Zeno utilizes high-precision automated machinery to fabricate and verify every component of our Medium-Voltage Air-Insulated Switchgear.
The global electrical market is transitioning toward decarbonization and intelligent grid management. Traditionally, Ring Main Units (RMUs) and compact switchgear have relied on SF6 (sulfur hexafluoride) gas as an insulation medium due to its high dielectric strength. However, SF6 is a potent greenhouse gas. Zeno Electric is spearheading the switch to SF6-Free Air-Insulated Switchgear, utilizing dry air insulation combined with vacuum interrupters, ensuring zero environmental footprint without sacrificing safety margins.
Simultaneously, smart grids require deep sensor integration. Our AIS panels can be optioned with continuous thermal monitoring of copper busbars, non-invasive partial discharge (PD) tracking sensors, and electronic protection relays with IEC 61850 protocol native compatibility. This enables plant operators to implement predictive maintenance and minimize costly unscheduled shutdowns.
Our SF6-Free AIS ranges utilize pressurized dry air or pure nitrogen, preventing harmful emissions and simplifying decommission and recycling processes at the end of the equipment's lifespan.
Integrated online sensors for temperature measurement, mechanical life counting, and circuit breaker speed calculations stream live diagnostics directly to SCADA systems, maximizing grid visibility.
Explore our diverse models including metal-clad, compact drawout, SF6-free, and Schneider-compatible units built to withstand sub-Saharan grid constraints.
Exporting heavy power hardware to Guinea requires understanding local administrative framework alignments. Standard procedures are structured through French-language technical documentation. Zeno provides comprehensive electrical manuals, wiring schemes, test reports, and parameter sheets in French to ensure fast clearances with the Ministry of Energy, Hydrology and Hydrocarbons, as well as smooth commissioning with onsite technicians.
Additionally, electrical grids in Boké, Kamsar, Conakry, and Nzérékoré feature variable ground system configurations. Our engineering team designs the switchgear panels according to localized grounding systems (isolated, solidly earthed, or neutral resistance earthed) to match the dynamic protection relays' logic requirements.
Our logistical network ensures secure and direct shipping lines from Ningbo Port to Conakry Autonomous Port (Port Autonome de Conakry) or Kamsar Port. All units are shipped in high-cube maritime containers wrapped in vacuum-sealed thermo-foils and secured in heavy-duty export seaworthy plywood crates. We include shock, vibration, and moisture indicator cards inside the panels to verify transit protection integrity before unpacking on site.
Essential answers to technical and commercial questions about importing and operating MV switchgear in Guinea.
We use a three-pronged approach for tropicalization: 1) High-density condensation control heaters with automatic humidistats; 2) Increased creepage distances for epoxy insulation materials to prevent tracking under wet conditions; 3) Double-layer epoxy powder coating on the steel enclosures to resist marine atmosphere salt-spray corrosion (tested under ISO 9227 salt spray standards).
Yes. We custom-build switchgear according to the localized standard technical requirements of the EDG distribution network (specifically at voltages such as 15kV, 20kV, and 22kV). Our panels accommodate custom protection relays (such as Schneider Sepam/MiCOM or ABB Relion series) that are fully compatible with local sub-station communication systems.
Yes. All of our Air-Insulated Switchgear models (including KYN28 and SM6-type structures) are tested by recognized independent laboratories like KEMA, ASTA, or CNAS. The type tests cover dielectric capacity, temperature rise limits, short-time withstand current, mechanical operation cycles, and internal arc fault safety.
Depending on custom parameters and order volume, the manufacturing time at our Ningbo factory ranges from 4 to 6 weeks. Ocean freight from Ningbo Port to Conakry Port takes approximately 35 to 45 days. We coordinate complete transport logistics, providing CIF/FOB documentation, and helping you navigate customs procedures.
Yes. We supply 12kV and 24kV SF6-Free Air-Insulated RMUs and switchgear cabinets. These units use pressurized clean dry air or eco-gases as insulation, eliminating SF6 gas and aligning with corporate sustainability initiatives for global mining enterprises active in West Africa.
Contact our engineering consulting team today to receive a complete customized technical proposal, detailed wiring single-line diagrams, and competitive factory-direct pricing.
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Zeno Electric
