What Are the Differences Between Pad-Mounted Substations and Pad-Mounted Transformers?

What Are the Differences Between Pad-Mounted Substations and Pad-Mounted Transformers?

1.Internal Components:

Pad-Mounted Substation: A pad-mounted substation primarily consists of its internal transformer, electric energy metering equipment, high-voltage and low-voltage switchgear, as well as connecting cables and some auxiliary equipment. It serves as a mini-substation or a distribution station, supplying power to specific users.

Pad-Mounted Transformer: A pad-mounted transformer mainly includes the transformer itself. It typically lacks electric energy metering equipment and high/low-voltage switchgear. Its primary function is voltage transformation, without providing power distribution or metering services.


Pad-Mounted Substation: In a pad-mounted substation, the transformer and switchgear are housed within the same enclosure, creating a compact integrated unit.

Pad-Mounted Transformer: Pad-mounted transformers are usually installed separately and do not have additional structures or buildings attached unless an auxiliary distribution room is needed.

3.Land Resource Usage:

Pad-Mounted Substations generally require more land resources since they often involve constructing additional buildings like distribution rooms, resulting in a larger footprint.
Pad-Mounted Transformers are more space-efficient as they do not require extra buildings, consisting mainly of the transformer itself.

4.Site Selection and Flexibility:

Pad-Mounted Substations offer more flexibility in site selection because of their smaller land footprint, making it easier to find suitable locations within urban areas without significantly impacting the city’s aesthetics.
In summary, pad-mounted substations and pad-mounted transformers differ in terms of their functionality, layout, land resource usage, and site selection flexibility. The choice between them depends on the specific needs of power distribution and facilities, available land and budget constraints.