Products: 
 KBSG series of mining flameproof dry-type transformer is the coal industry companies to adapt to the increasingly serious security situation, underground power supply to meet demand for coal companies, learning from the domestic industry on the basis of advanced technology, combined with the company four years the production of transformers experience, the newly developed underground distribution function with explosion-proof products. 

 Purpose, scope, and main functions: 
 KBSG series of mining flameproof dry-type transformer (hereinafter referred to as dry-type transformer) for a gas mixture of methane and coal dust, and there is risk of explosion of mine, rated frequency is 50Hz, a voltage is 6KV or 10KV, neutral point grounded three-phase power system operation, for a variety of coal mine electrical power equipment and a variety of devices to provide power. 

 Features: 
 * Core with high magnetic quality cold-rolled silicon steel, joint small, low loss, low noise. 
 * Coil layer, turn to turn by the United States DuPont NOMEX-410 insulation materials, H-class heat-resistant grade, long-term operation at 200 degrees Celsius. 
 * Coil vacuum dipping, dipping deep paint fully penetrate to the coil. 160-170 degrees C drying curing, high mechanical strength. 
 * The body of the vacuum drying by pressure swing method, the body of a layer of moisture covering the surface of paint halo, good insulation properties. 
 * Shell is a large rectangular corrugated structure, cover and have a good proof box along the surface of the shell to the internal pressure by 1Mpa. 
 * The product has good thermal performance and insulation performance, high temperature, high humidity and other harsh environmental conditions than the normal operation. 
 Conditions of Use: 
 1, altitude less than 1000m; 
 2, Ambient temperature: maximum temperature of 40 ℃ 
 The maximum monthly average temperature of 30 ℃ 
 The highest annual average temperature of 20 ℃ 
 Minimum temperature of -5 ℃ 
 3, the air relative humidity of not more than 95% (25 ℃ pm); 
 4, in a gas mixture of methane and coal dust, and there is danger of mine explosions; 
 5, no strong turbulence, vibration, and with the vertical gradient of not more than 15 ° of the environment; 
 6, no sufficient to corrode metal and damage the insulation of gas and steam; 
 7, no dripping place; 
 8, power supply, sine wave; 
 9, similar to symmetrical three-phase power supply voltage.