Electrical Knowledge | Key Differences Between Transformers

Electrical Knowledge | Key Differences Between Substations, Switchyards, Transformer Substations, Distribution Rooms, and Box Transformers

Substation

A substation is where voltage levels are transformed—either stepped up or down—to ensure stable transmission and distribution of electrical power. Substations handle voltages typically below 110 kV and often include voltage regulation, current control, and protection systems.

Switchgear Station

A switchgear station (also known as a switch station) is equipped with high-voltage equipment used exclusively for switching and distributing electricity. It does not include a main transformer, which distinguishes it from transformer substations.

Transformer Substation

This type of station includes one or more power transformers and is responsible for stepping voltage levels up or down. It plays a key role in voltage conversion and load distribution between the transmission and distribution networks.

Distribution Room

Also called a distribution station, this facility is focused on distributing electricity at lower voltages for end-user consumption. It contains mainly low- and medium-voltage switchgear and protects equipment downstream.

Box-Type Transformer (Box Substation)

A box-type transformer integrates a transformer, high-voltage switchgear, low-voltage distribution panel, metering, and compensation units into one compact enclosure. It's essentially a mini-substation used for fast deployment in urban or rural power networks.

Each of these installations plays a unique role in the power supply chain, from large-scale voltage transformation to localized power delivery.