The journey of electricity from its source to its final use involves a meticulously managed, six-stage process known as the power grid. Each stage requires specialized equipment and expertise to ensure a safe and efficient power supply.

1. Generation: This is the initial stage where electricity is created at power plants from various energy sources, such as coal, natural gas, hydro, wind, or solar.

2. Step-Up Transformation: The electricity generated at a power plant is at a relatively low voltage. To minimize energy loss during long-distance travel, transformers are used to significantly step up the voltage to extremely high levels (e.g., 110 kV, 220 kV, 400 kV, 750 kV).

3. Transmission: The high-voltage electricity is then transmitted over long distances through a network of overhead transmission lines (OHTL) and underground cables. This is the stage where Ningbo Changshi's specialized tension stringing equipment and underground cable laying equipment are essential for the safe and efficient installation of conductors.

4. Step-Down Transformation: As the electricity approaches populated areas, it reaches substations. Here, large transformers step down the voltage to a lower level suitable for regional distribution.

5. Distribution: From substations, the lower-voltage electricity is routed through a network of distribution lines (both overhead and underground) that deliver power to local neighborhoods, industrial parks, and commercial buildings.

6. Utilization: This is the final stage where electricity arrives at its destination (homes, offices, factories) and is used to power lights, appliances, machinery, and all other electrical devices.