Underground distribution substations

   Underground distribution substations are also located near to the end users. Distribution substation transformers change the subtransmission voltage to lower levels for use by end-users. Typical distribution voltages vary from 34,500Y/19,920 volts to 4,160Y/2400 volts.

Underground Distribution Substation

§ Conduits

§ Duct Runs

§ Manholes

§ High-Voltage Underground Cables

§ Transformer Vault

§ Riser

§ Transformers

From here the power is distributed to industrial, commercial, and residential customers.