Definition
A feeder line is a medium-voltage electrical line that carries power from a substation to distribution transformers, switchgear, or large industrial loads. It serves as a primary pathway for delivering electricity across local and regional networks before it is stepped down for end-user consumption. As a result, feeder lines play a critical role in transporting significant amounts of power with minimal loss. Additionally, they are often designed with redundancy and protective devices to ensure reliability and continuity of service.
How It Applies to Data Centers
Feeder lines are essential for data centers because they provide the medium-voltage power needed to supply transformers, UPS systems, and high-density compute equipment. Therefore, the quality and capacity of regional feeder lines directly affect the reliability and scalability of a data-center site. Furthermore, many facilities require multiple redundant feeders from separate substations to ensure uninterrupted power during maintenance or unexpected outages. As a result, access to robust feeder infrastructure is a key factor in site selection for AI, crypto, and quantum workloads. Additionally, feeder capacity helps determine how quickly a data center can expand as electrical demand increases.
Related Terms
Additional Reading
U.S. Energy Information Administration (EIA) — “Electricity Delivery and Distribution”
FAQ
Q: What is the purpose of a feeder line?
A: A feeder line carries medium-voltage electricity from a substation to distribution transformers and major consumers. Consequently, it ensures reliable power delivery across local grids.
Q: Why are feeder lines important for data centers?
A: They supply the medium-voltage power that feeds transformers and switchgear. Therefore, feeder reliability has a direct impact on uptime and scalability.
Q: Do data centers require redundant feeders?
A: Yes. Many large facilities use dual or multiple feeder lines from different substations. Additionally, this redundancy reduces the risk of outages during maintenance or faults.