Leeds Transformer provides fully detailed, priced quotations, outlining all technical and administrative arrangements, alongside clear terms. Our in-house design process utilises ProgeCAD® (AutoCad® Compatible), Microsoft® Word, Excel, and proprietary design tools and data. All manufacturing adheres to stringent standards, including Lloyds Register of Shipping, BS 171 – IEC 60076 – IEC 60726 – IEC 60079 where applicable. Our computer-controlled sales and purchase system, coupled with robust quality, stock procurement, and control measures, conforms to the BS EN ISO 9001:2015 Standard, managed through a Filemaker® database system. To ensure accuracy and reliability, all instruments, precision tooling, and lifting equipment are certified and calibrated.

The manufacturing process includes in-house automated cutting of electrical grade, grain-oriented, low-loss steel cores in both straight and mitred configurations. Our clean, ferrous-free winding environment is dedicated to producing prime quality, UK-sourced, electrical grade copper coils. We utilise high-quality insulation materials such as DuPont™ Nomex® Paper and Pressboard, Weidmann Whiteley Elephantide, and Presspahn Insulation. To further enhance insulation, we employ drying out, vacuum impregnation, and full thermal curing of Advanced Electrical Varnish (AEV) solvent-less varnish in an airflow oven, with each stage meticulously tested using calibrated Megger, Fluke, and Chauvin Arnoux instruments. We apply extremely robust techniques in the design of coil-to-core and transformer-to-case assemblies.

For fluid-cooled units, we use high-quality coolants from M & I Materials Ltd, Midel 7131®, Xiameter / Dow Corning® PMX-561 Silicone Fluid, and Transformer Insulating Oil BS148: 2009 & IEC 60296:2012. Hermetically sealed units are issued with an inert BOC dry nitrogen blanket above the fluid. All products undergo routine and temperature rise (type) testing in accordance with BS EN 60076. Additional testing and certifications, such as impulse testing, ATEX / IECEx Certification by SIRA/CML, and inspection by Bureau Veritas (BV), Det Norske Veritas (DNV), Lloyds Register of Shipping (LRS), and American Bureau of Shipping (ABS), are available. We ensure CE marking in accordance with European directive 2006/95/EC and UKCA marking for UK government standards.

Leeds Transformer provides comprehensive casing, crating, packing, and shipping services to international standards, with transportation options including groupage, door-to-door, sea, and air freight. We offer full documentation packages, including but not limited to ‘Installation, Operation and Maintenance’ (IOM) and ‘Certification’ Manuals, ensuring complete support for our customers.