This product is integrated with two to three reactor coils, thus can be used as two to three reactors simultaneously. Through accurate calculation and computer electromagnetic simulation, the inductance values of each reactor can be designed separately and controlled within prescribed limits. The product adopts simple structure and is cooled with natural air, thus can be easily installed and arranged into the vehicle’s general layout. In order to guarantee the reactor’s safety during long-term operation, the reactor’s temperature rise is optimized by the computer, which means that the top temperature of the hot spot is strictly controlled with an adequate allowance being left when calculating. This product adopts unique manufacturing techniques, many of which have obtained national patent protection. These techniques strictly supervise the quality, optimize the structure and guarantee the stability and maintainability of the product. Products of 03 series are currently the most widely used reactor series, and has been serving on metro lines in Beijing, Qingdao, Chongqing, Jinan, and has been running for 10 years nonstop.