High voltage refers to electrical energy at a level that is significantly higher than standard household voltage. It typically involves voltages above 1,000 volts for alternating current (AC) and 1,500 volts for direct current (DC). High voltage is used in various applications, including power transmission over long distances, where it helps reduce energy loss. To safely manage high voltage, specialized equipment and safety protocols are essential. This includes the use of transformers to step up or step down voltage levels, as well as protective gear for workers. High voltage systems are crucial for the operation of power grids and large industrial machinery.