KKSG Mining Dry-Type Transformer

CEEG KKSG Mining Dry-Type Transformer

General-Purpose Dry-Type Transformer for Mining Applications features reinforced insulation and optimized heat dissipation design. It offers low loss, low noise operation, and excellent resistance to moisture and dust, making it well-suited for auxiliary power distribution in both surface and underground mining environments.

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Scope of application

Coal Preparation Plants

Power distribution for coal washing and processing facilities, with a focus on dust protection and reliable operation.

Underground Auxiliary Systems

Auxiliary power distribution in general underground environments, emphasizing low noise performance and moisture resistance.

Mining Area Facilities

Power supply for offices, living areas, and auxiliary stations, with a focus on ease of maintenance and operational convenience.

Product Description

1 Flexible protection options: Optional enclosure with IP21–IP32 rating, providing protection against foreign objects and dripping water, suitable for mining environments.

2 Temperature monitoring and protection: Equipped with temperature indication, over-temperature alarm/trip, and fan interlocking to enhance operational safety.

3 Cooling and overload capacity: AN allows full-load operation, while AF enables approximately 50% capacity increase to handle short-term overload conditions.

4 Advanced winding technology: High-voltage windings use vacuum casting to suppress partial discharge; low-voltage windings adopt foil winding for stable structure and high precision.

5 Low loss and low noise: High-quality silicon steel sheets with 45° step-lap construction and moisture-proof coating effectively reduce losses and noise.

6 Strict factory testing: Comprehensive tests including partial discharge, impulse, and noise testing are conducted in accordance with standards to ensure high reliability.

Product Features

High-strength enclosure design

The KKSG enclosure is fabricated from high-quality structural steel and cold-rolled steel plates, treated with sandblasting for rust removal and coated with anti-corrosion paint, providing high mechanical strength and excellent corrosion resistance.

Thermal management and temperature control

Natural ventilation combined with automatically controlled fans for forced air cooling effectively regulates temperature and ensures safe operation of the equipment.

Safety and environmental protection

With flame-retardant, fire-resistant, and pollution-free characteristics, it can be directly installed at load centers.

Low loss and high performance

The product features low losses, low partial discharge, low noise, and strong heat dissipation capability, with performance parameters exceeding national standards.

Convenience and low cost

Maintenance-free design with easy installation, low operating costs, and high overall cost performance.

High reliability and protection capability

High reliability with strong seismic resistance, as well as moisture-proof and corrosion-resistant properties, suitable for harsh mining environments.

Main Parameters

Rated capacity	50 kVA to 2500 kVA (customizable)
Rated voltage	High-voltage side 3.3 kV / 6 kV / 10 kV
Rated voltage	Low-voltage side 0.69 kV / 0.4 kV
Connection group	Dyn11, Yyn0 (or customized as required)
Insulation class	Class F / Class H

Implementation Standard

GB/T 10228-2015 Dry-type power transformer – Technical specifications and requirements

GB/T 1094.1-2013 Power transformers – Part 1: General requirements

GB/T 1094.11-2007 Dry-type power transformer

GB/T 15576-2008 General technical requirements for explosion-protected electrical equipment for coal mines

MT/T 437-2016 General technical requirements for flameproof variable frequency drives for coal mines

Technical Advantages

R&D Cloud Platform

An integrated digital platform combining electromagnetic optimization design, parametric modeling, performance analysis, structural optimization, and automatic drawing generation. It enables transformer design resource sharing and efficient data management, including search, modification, and version control.

Simulation Analysis

Comprehensive multi-physics simulation covering fluid flow, thermal field, electric field, leakage magnetic field, transient processes, and short-circuit forces. Each transformer series is optimized through thermal and flow analysis to accurately control winding temperature rise and hotspot distribution, ensuring reliable and stable performance.

Smart Operation & Maintenance Platform

By collecting key data such as temperature, current, voltage, vibration, and grid harmonics, the system enables real-time power quality analysis and fault alarms. It also supports mobile access for remote monitoring and intelligent O&M management.