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jewelry shops wholesale Power generation is electricity. There is always a distance from the power plant to the electrical equipment, whether it is long or short.
The AC electricity can be used to increase or lower voltage through the transformer, so as to achieve long -distance transmission, and to the rated voltage of electrical equipment of different power. This is an advantage of AC. Transmission. However, the wire resistance and current are heated. This heat is useless and nothing is a waste. How to reduce energy loss in the transmission of electrical energy, thereby effectively using power resistance.
, the current is me, then the total length of the power line loss is the P = I2R wire. Design L, the cross -sectional area of the wire, knows from the resistor R = P L / s.
The actual transmission power method, consider various factors, and select cross -transmission voltage and cross -sectional area according to different situations. The voltage generated by large generators is 1500 volts, 13,800 volts, 15750 volts, and 15,000 volts. This voltage cannot be transmitted directly. In the power station, you need to increase the voltage transformer to increase the power supply and then transfer it to the distance. China's long -distance transmission uses voltage of 110,000 volt, 220,000 and 330,000 volts, and the voltage supply of 500,000 volts has been adopted in some areas. The highest test transmission voltage in the world is now 1.15 million. Voltage
The long -distance transmission is very high, and the direct application of electrical equipment, so the county in the electrical areas, as you call counties, establish county -level substations according to different users, such as 220kV, 110kV, 35KV, 10KV substation, one by one will be one by one, which will be one by one. Reduce the voltage, the voltage drops to 10,000 volts, and send it to a high -voltage power station. The voltage drops to a low voltage of 220 /380 volts. For ordinary users, such as family, schools, shops, institutions, enterprises, public institutions.
With the construction and development of urban and rural areas, the distribution network of power consumption in China has increased rapidly, and the task of 10KV power supply is getting heavier. China, China has launched a matching experience and actual design experience, such as the design code of the "10KV substation design specification" as a "rural power network planning and design guide for urban power grid planning and design guidelines" urban planning standards " 66KV and below air -to -power line design specifications "design technical procedures for overhead distribution lines" The design specifications of insulation on overhead power distribution lines. Specifications "," Standards for Design of Electric Measurement and Electric Energy Measurement Device "standard and" 10KV "power station project Atlas 10kV and below distribution line project" Atlas 10kV and below Atlas " Essence Friends who are interested in consulting county power professionals can also borrow books from them.