KYN61-40.5 armored movable AC metal enclosed switchgear (hereinafter referred to as switchgear) is suitable for three-phase AC 50Hz power systems, used for receiving and distributing electrical energy in distribution rooms of power plants, substations, and industrial and mining enterprises, and for controlling, protecting, and monitoring circuits.

The widely used loads are mostly nonlinear loads, such as rectifiers, frequency converters, UPS, elevators, air conditioners, energy-saving lights, copiers, household appliances, etc. These nonlinear loads will generate a large amount of harmonic currents and inject them into the power grid, causing voltage waveform distortion and posing serious harm to the power grid and all backend users. In addition, impulsive and fluctuating loads, such as electric arc furnaces, welding equipment, etc., not only generate a large number of high-order harmonics during operation, but also cause voltage fluctuations, flicker, and three-phase imbalance and other power quality problems, seriously affecting the efficiency of electricity use.