What Is a Prefabricated Substation?

Prefabricated substation is a comprehensive power distribution equipment that integrates high-voltage switchgear, distribution transformers and low-voltage distribution devices. Its components are carefully arranged and integrated according to a specific wiring scheme. It is suitable for both indoor and outdoor environments, showing a compact and efficient design feature. This type of equipment cleverly integrates multiple functions such as high-voltage power receiving, transformer step-down and low-voltage power distribution, and is placed in a fully enclosed steel structure box with moisture-proof, rust-proof, dust-proof, rodent-proof, fire-proof, anti-theft and heat-insulating properties, forming a safe and reliable operating environment. Prefabricated substations have been widely used in urban network construction and renovation projects with their unique advantages, becoming an innovative substation form after traditional civil substations.

Prefabricated substations have a wide range of applications, covering mines, factories, enterprises, oil and gas fields, wind power stations and other fields, effectively replacing traditional civil power distribution rooms and becoming a new type of complete set of power distribution equipment. Its voltage level is usually set at 6 to 35 kV for high voltage and 220/380 V for low voltage. It uses three-phase AC power supply with a frequency of 50 Hz and a rated capacity range of 30 to 1600 kVA. The transformers equipped in prefabricated substations are divided into two types: dry type and oil-immersed type to meet different application requirements.

Prefabricated substations are widely used in urban high-rise buildings, urban and rural residential areas, high-tech development zones, small and medium-sized factories, mines and oil fields, and temporary construction power supply. They play a key role in receiving and distributing electric energy in the power distribution system. Its efficient, safe and reliable performance, as well as flexible and convenient deployment methods, make prefabricated substations an indispensable and important part of modern power systems.