A unit substation is a power distribution system that includes a transformer, switches, and other necessary components all enclosed in a metal housing. The device is compact and a self-contained unit which can be installed in the electrical distribution system. It is usually housed indoors and used to step down high-power voltage to a lower voltage which can be used in smaller settings like residential areas and commercial buildings.
In the case of a package substation, it is a pre-assembled unit that includes a transformer, switchgear, and other equipment in an enclosure. This device is suitable for industrial and commercial applications where high voltage is stepped down to lower voltage while maintaining stability at all times. It is used in locations where space is limited and requires quick installation.
Here is a detailed comparison of the two devices:
UNIT SUBSTATION
- Component: It consists of separate but linked components which include high voltage switchgear, transformer, and secondary low voltage switchgear.
- Installation: The components of this system are separate and connected only to the site. This offers greater flexibility during installation to suit the needs of the user and the site.
- Application: It is mainly used in industrial sites, commercial buildings, and big facilities where a great degree of flexibility is required while setting up the infrastructure.
- Versatile. Its components can be easily upgraded since they are separate units and can be reviewed individually by users to determine these changes.
- Size: Unit substations are usually bigger since they are required for higher capacities.
PACKAGE SUBSTATION
- Components: All of its components are integrated into a single housing, which includes primary high-voltage switchgear, transformer, and secondary low-voltage switchgear.
- Installation: The package substation is pre-assembled and comes as a single unit which is ready for installation. This reduces effort and cost while installing the device.
- Application: It is ideal for sites where space is limited, such as urban areas, commercial buildings, small factories, etc.
- Compact: Due to its smaller size and ease of installation, it is perfect for places where there is space constraint. It can be easily installed since it comes pre-assembled, leading to easier commissioning and maintenance.
- Choosing a unit substation or a package substation depends largely on the project's needs and space allotment. The overall application of both devices is largely the same and its main difference lies in its versatility and flexibility.
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