EN
Mining Transformer Replacement Project
Project Overview
A mining operator in the Kuyavian-Pomeranian Province of Poland initiated a fleet-wide replacement of aging power transformers to comply with the EU Regulation 548/2014 Tier2 energy efficiency standards. The existing units—many operating beyond their design life—suffered from high no-load and load losses, frequent failures, and escalating maintenance costs. With the mine running 24/7, unplanned outages directly impacted production. Additionally, standard industrial transformers could not withstand the site’s humid, dusty, and mildly corrosive underground environment. The client required new, certified, high-efficiency oil-immersed transformers that met both EU regulations and Polish mining safety codes.
Key project requirements included
Full compliance with EU 548/2014 Tier2 loss limits and German technical standards (widely referenced in Polish mining)
Robust construction for harsh mine conditions: dust ingress, moisture, and chemical exposure
Reduced total cost of ownership through lower energy losses and minimal maintenance
Timely delivery to support phased equipment replacement without operational disruption
TSTY Electric’s Customized Solution
TSTY supplied a batch of new oil-immersed distribution transformers (800–2000 kVA) fully compliant with EU Tier2 efficiency limits and IEC 60076 standards. All units were engineered with enhanced sealing, corrosion-resistant finishes, and optimized core designs to minimize no-load and load losses. Certified to German technical norms commonly adopted in Polish mining, the transformers also featured reinforced bushings and robust tank construction for long-term reliability in aggressive environments. TSTY coordinated accelerated production and logistics to align with the mine’s maintenance windows.
Core Technical Adaptations
Fully compliant with EU 548/2014 Tier2 efficiency and German technical standards
Enhanced sealing and anti-corrosion treatment for dusty, humid mine environments
Low-loss core and winding design to reduce annual electricity consumption
Accelerated manufacturing and delivery aligned with mine’s operational schedule
Equipment Scope Delivered
Equipment
Ratings
Quantity
Key Features
Oil-Immersed Distribution Transformer
800 kVA, 1000 kVA,
1250 kVA, 2000 kVA
Primary: 20/10 kV;
Secondary: 0.4/0.69 kV
Multiple units
• EU Tier2 compliant
(low no-load/load losses)
• IEC 60076 & EN 50541
certified
• Mine-hardened enclosure
with IP54 protection
*All units passed third-party type testing per regional requirements prior to shipment.
Engineered for Europe, Validated Globally
In European heavy industry, regulatory compliance and operational continuity go hand in hand. This project delivered both—through precision engineering and deep market understanding.
Future-Proof Compliance, Today
By meeting EU Tier2 loss limits and referencing German norms, the new transformers ensure long-term regulatory alignment across Central Europe.
Built for the Mine, Not Just the Grid
Enhanced gaskets, coated internals, and robust bushings protect against dust, condensation, and chemical exposure—extending service life underground.
Lower Energy Bills, Fewer Outages
With up to 20% lower total losses versus legacy units, the fleet is projected to save significant annual electricity costs while reducing failure-driven downtime.
Seamless Integration into Critical Operations
Through coordinated production planning and on-time delivery, TSTY enabled a smooth, phase-by-phase transformer replacement—keeping the mine running without interruption.
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