Engineering Capabilities & Expertise
At LH Marthinusen, we deliver world-class electro-mechanical engineering solutions across South Africa, with over a century of trusted expertise as one of Africa’s largest repairers of electric motors, transformers, and rotating machinery. As part of the ACTOM Group, our strengths lie in our end-to-end capabilities: from precision design and custom manufacturing of transformers (ranging from 10kVA to 200MVA at 275kV, including furnace, dry-type with VPI or cast resin insulation, power/distribution, rectifier, and traction types), industrial fans (including large-scale centrifugal units up to 4m diameter with 3MW motors, reverse engineering of obsolete designs, energy-saving retrofits, performance testing, rotor balancing, and full refurbishment), to reverse engineering and rebuilding of medium/high-voltage motors, large DC motors, traction motors, generators, and associated rotating equipment.
Our state-of-the-art infrastructure—featuring specialized workshops with gantry and overhead cranes up to 160 tons, dedicated heavy-lift transport for abnormal loads, controlled drying ovens, advanced VPI plants for epoxy resin impregnation, comprehensive transformer and motor testing facilities (routine, load, no-load, and special tests), and full mechanical manufacturing/machining—ensures safe handling, superior quality workmanship, and exceptional reliability. We excel in on-site services, field work, condition monitoring, oil testing/purification, coil manufacturing (stator, rotor, armature, field, and interpole to IEC standards), and energy-efficient upgrades that extend equipment life while optimizing performance across mining, power generation, metallurgical, and industrial sectors.
Backed by our DHET- and NAMB-accredited training school for electromechanical winding and skills development, plus a commitment to innovation and high-performance solutions, LH Marthinusen empowers industries with durable, efficient, and tailored engineering that minimizes downtime and maximizes operational longevity.