Having a very high voltage is necessary in certain applications for several reasons:
1. Power transmission: High voltage is used in power transmission lines to reduce energy losses over long distances. By increasing the voltage, the current can be reduced, which in turn reduces the amount of energy lost as heat in the transmission lines.
2. Efficiency: High voltage is more efficient for transmitting power over long distances. It allows for more power to be transmitted with less energy loss, making the system more efficient overall.
3. Equipment size: High voltage allows for smaller and lighter equipment to be used in power transmission and distribution systems. This can help reduce costs and make the system more compact.
4. Safety: High voltage can be used to create electric fields that can be used for insulation and protection in certain applications. It can also be used to power devices that require high voltage for operation.
Overall, having a very high voltage is necessary in certain applications to improve efficiency, reduce energy losses, and ensure the safety and reliability of the system.