Distribution Line Poles

Electricity, first created at power stations and then transmitted via transmission lines to substations near consuming areas, is then finally delivered to our customers via power lines called distribution lines.

Distribution lines consist of “overhead distribution lines” (power lines hung on utility ) and “underground distribution lines” (cables buried in the ground). Although the majority of distribution lines are overhead lines, the amount of underground distribution lines has been growing in the center of Tokyo.

Distribution lines are separated by voltage into special-high voltage (22,000 V), high-voltage (6,600 V), and low-voltage (200-V and 100-V) types. Electricity leaving distribution substations normally has a voltage of 6,600 V and is sent along distribution lines to the homes and offices of our customers. It is finally delivered with a voltage of 100 or 200 volts.

Distribution equipment consist of “transformers” (reduce voltage from high to low), “service lines” (split off from high and low-voltage lines to provide electricity to customers), and “power meters” (measure amount of power used).