English 
A substation is a type of high voltage switching system, a distribution transformer and a low voltage energy distribution device. It is a compact power distribution system for the inner and outer areas, pre-fabricated on the factory side, arranged according to a specific wiring scheme. Combined, the substation is installed in a moisture-protected, rust-free, dust-tight, nail-resistant, fire-resistant, theft-resistant, heat-insulating, fully closed and drivable steel case, which is particularly suitable for urban network construction and conversion, A new type of substation is created after the civil substation.
I believe many friends do not know much about low-voltage switchgear, or even know nothing about it. In short, the low-voltage switchgear is a collective device for switches, which can well control the power supply of corresponding equipment. For low-voltage switchgear, its application fields are also very wide, mainly in some power plants, petrochemical industry, metallurgy, related textiles, and even high-rise buildings. Its practical function is to be applied as transmission, distribution and electric energy conversion.
Oil Immersed Transformer Transformer oil has good insulation performance, good thermal conductivity, and at the same time the Transformer oil is cheap. Moreover, Oil Immersed Transformer can solve the problem of large-capacity heat dissipation and high-voltage insulation of Transformers.
The main function of medium voltage switchgear is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and electric energy conversion in the power system. It is mainly composed of circuit breaker, disconnector, load switch, operating mechanism, transformer and various protective devices.