High voltage is used for long-distance transmission to minimize energy loss. As a manufacturer of overhead transmission line equipment and underground cable laying equipment, we know that power loss is directly related to the current flowing through a line. By increasing the voltage, the current can be significantly reduced while still transmitting the same amount of power. This makes the long-distance transport of electricity much more efficient and cost-effective. The voltage is then "stepped down" at substations closer to consumers, using transformers to bring it to a safe and usable level for homes and businesses.