Mining transformers are purpose-built for mine-site power supply, operating underground or in open-pit environments. Their reinforced construction delivers high impact resistance and explosion-proof safety, ensuring reliable performance in damp, dusty, and potentially flammable/explosive conditions.Product OverviewKKSG mining general-purpose dry-type transformers are designed and manufactured in strict accordance with national and industry standards. Advanced insulation and heat-dissipation technologies deliver low losses, low noise, and maintenance-free operation, while providing superior moisture, dust, and corrosion resistance. Their robust structure and innovative design guarantee excellent Transformer al performance and long service life, making them the ideal choice for modern mine power-distribution systems.ApplicationsSuitable for mine power-distribution systems in non-explosive atmospheres (free of methane and coal dust). Widely used in metallic and non-metallic mines—iron, copper, gold, aluminum, stone, bauxite—and in highway, railway, and tunnel projects where demanding conditions prevail.Product DescriptionEnclosure & Protection: Optional IP21–IP32 enclosures prevent ingress of solid objects and dripping water, meeting mine-site requirements.Temperature Control: Integrated thermal protection offers temperature display, over-temperature alarm, trip, and automatic fan start-up for safe operation.Cooling Modes: Natural air (AN) supports 100 % rated capacity; forced air (AF) boosts capacity by 50 % for short-time overloads.HV & LV Windings: HV windings are vacuum-cast to suppress partial discharge; LV windings use precision-wound foil conductors for high accuracy and stability.Core Design: High-permeability silicon-steel laminations, 45° step-lap stacking, and moisture-proof coating minimize losses and noise.Stringent Testing: Each unit undergoes partial-discharge, lightning-impulse, noise, and other tests per national standards to ensure top quality and reliability.Key FeaturesRugged enclosure: KKSG housings are welded from premium structural steel and cold-rolled plates, shot-blasted, and finished with five-proof paint for high mechanical strength and corrosion resistance.Cooling & thermal control: Natural ventilation plus automatically controlled forced-air cooling keep temperatures within safe limits.Low losses & high performance: Lower losses, partial discharge, and noise than national standards, with excellent heat-dissipation capacity.Safety & environmental protection: Fire-resistant, non-toxic, and pollution-free; can be installed directly at the load center.Easy installation & low cost: Maintenance-free, quick to install, and offers low operating costs for outstanding overall economy.High reliability & protection: Reliable operation, strong seismic and shock resistance, and excellent moisture and corrosion protection for harsh mine environments.Main SpecificationsRated Capacity: 50 kVA – 2 500 kVA (customizable)Rated Voltage (HV): 3.3 kV / 6 kV / 10 kVRated Voltage (LV): 0.69 kV / 0.4 kVVector Group: Dyn11, Yyn0, or customized per user requirementInsulation Class: F / HApplicable StandardsGB/T 10228-2015 Dry-type power transformers – Technical parameters and requirementsGB/T 1094.1-2013 Power transformers – Part 1: GeneralGB/T 1094.11-2007 Power transformers – Part 11: Dry-type transformersGB/T 15576-2008 Mining explosion-proof Transformer al equipment – General technical conditionsMT/T 437-2016 Mining explosion-proof variable-frequency drives – General technical conditions