HV/LV Works & Equipment
A complete range of interventions on electrical networks, from high voltage to photovoltaic installations and road signalling.
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High Voltage HV 22KV
Studies, routing, pulling and connections of HV 22KV lines. Construction of overhead lines on reinforced concrete poles and metal pylons, underground lines in insulated HV cable, and overhead-underground lines combining both technologies according to terrain constraints. Every intervention is carried out by certified electricians in accordance with SENELEC specifications.
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Transformer Substations
Installation and commissioning of transformer substations of all types: H61 type on pole or pylon, rural overhead type, urban ground-level type. Standard and motorised (remote-controlled) prefabricated HV cells, compact prefabricated substations for urban or industrial areas. Connections, testing and commissioning included.
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Low Voltage (LV)
LV support mounting (concrete poles, fittings), cable pulling, individual and collective installations and connections. Full electrification of industrial units, urban housing estates, agricultural farms and housing groups. Distribution panels, meters, residual-current devices and earthing.
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Public Lighting
Supply and installation of LED, HPS (high-pressure sodium), mercury vapour and metal halide luminaires. Single or double-arm lantern columns, galvanised steel masts from 4 to 12 metres. Cabling of controls, public lighting cabinet panels and timer or twilight remote control systems.
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Solar Photovoltaic System
Sizing studies, supply and installation of off-grid or grid-connected photovoltaic systems. Residential kits, solar power plants for housing estates and agricultural solar pumping. Integration of storage batteries and high-performance inverters.
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Road Signalling
Installation of vertical road signs (warning, regulatory, information), road markings (solid/dashed lines, pedestrian crossings, direction arrows), road safety equipment (guardrails, delineators, markers). Works coordinated with road authorities.
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Maintenance & Diagnostics
Preventive and corrective maintenance contracts on existing HV/LV networks. Diagnostic of ageing networks, infrared thermography, insulation and earth resistance measurements. Full rehabilitation of degraded networks. Supply, installation and maintenance of generating sets up to 450 KVA for service continuity.
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Studies & Electrical Engineering
Design of single-line diagrams, HV/LV network dimensioning, voltage drop and short-circuit calculations. Preparation of technical dossiers for tenders (DAO/DCE), owner's project management assistance and compliance monitoring through to SENELEC acceptance.
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Earthing & Protection
Installation of earthing systems (foundation earth rods, stakes, meshes), soil resistivity measurements and equipotential verification. Installation of surge arresters, residual-current circuit breakers and overvoltage protection devices for industrial and commercial networks.
In the Field
Pole erection, underground HV cabling, switching cabinets, transformer substations - discover our COTRAC teams at work on electrical sites across Senegal.
Standards & Technical References
All our electrical works are carried out in compliance with international standards and national operator specifications.
IEC
International Electrotechnical Commission - global reference for electrical equipment, cables, HV switchgear and protection. All our supplies and installations comply with IEC series 60364, 60502 and 61936.
IEEE
Institute of Electrical and Electronics Engineers - IEEE standards for distribution networks, transformers (IEEE C57), power system protection and photovoltaic systems (IEEE 1547).
SENELEC
Technical specifications and requirements of the Société Nationale d'Électricité du Sénégal - connection standards, network access conditions, company accreditation and works inspection by the national concessionaire.
They trust us
Industrial companies, telecom operators, public institutions and agro-industrial firms - our partners attest to our reliability on electrical sites.
Our electrical sites in pictures
