Compact substation

Prefabricated substations are quickly becoming an essential part of the electrical system. These substations allow for the raising and lowering of voltages and can aid in power distribution to consumer areas. 

Prefabricated substation consists of high voltage switchgear, transformer and low voltage power distribution device to connect toghter , Compact d substation is divided into three functional compartments (high voltage room, transformer room and low-voltage chamber), high and low voltage chamber functions completely. High voltage side of primary with many power supply methods, also can be fitted with the high-voltage measurement components to meet the high voltage measurement requirement.

1. The transformer room can choose low loss of oil immersed transformer and dry type transformer , the transformer chamber is provided with ONAN system and lighting system, low voltage chamber adopts fix type structure or assembled Type structures to consist of users required power supply scheme , such as power distribution, lighting power distribution, reactive power compensation , electric energy metering and electric quantity measurement, multiple functions to meet the different requirements of users, and to convenient for users to manage the power supply and improve the quality of power supply

2. The structure of high voltage chamber is compact and reasonable, and has a comprehensive anti-misoperation interlocking function. The transformer under the condition of user requirements, can be provided with a guide rail for convenient to get in and out from the two sides door on transformer room . Each room has installed automatic lighting device, in addition , to high and low voltage chamber used all elements of reliable performance, convenient operation and to make the products running safety and reliable, convenient operation and maintenance.

3. Adopting natural ventilation and forced ventilation in two methods to make ventilation and cooling are good. The transformer room and the low voltage chamber are provided with ventilation channel. The exhaust fan is provided with a temperature control device, which is automatically start and close to ensure transformer in full load operations

4.The box body structure adopts channel steel and angle steel manufacturing, with strong mechanical strength, the enclosure is made of Aluminum Alloy insulation composite plate, stainless steel plate or non metal material manufacturing, surface smoothly, elegant appearance, and has good insulation effect and strong corrosion resistance. The rooms are provided partitions to separate into independent chambers ,the small chamber fitted lighting device, through a door to control switch. The top of the transformer room provided with an exhaust fan, automatically control transformer temperature, increasing air convection to reduces room temperature. The connection part of substation can rotate ,which used with rubber seal with strong moisture resistant ability.

5.This product as an important power supply unit of cable distribution network, setting high voltage control, protection, substation, power distribution device in the completely prefabricated product for 50Hz three-phase AC transformer at rated capacity to 1600KVA., It is widely used in the main house district, factories, hotels, hospitals, parks, airports, docks, oil. railway and temporary facilities and outdoor power supply place.

1. Ambient air temperature: -30℃~+50℃
2. Altitude : Maximum installation altitude: 2500m
3. Outdoor wind speed is not more than 35m/s;
relative humidity: daily average value not more than 95%, the monthly average value not more than 90%;
4.Seismic intensity not more than 8 degrees;
5.No fire, explosion danger, serious pollution, chemical corrosion and severe vibration

Compact substations : IEC61330
MV metal enclosed Switchgear : IEC 62271-200,IEC 60298
Switch Disconnector (Isolators) ,and earthing
Switches : IEC 60694-60129-60265 Power Transformer : IEC 60076
Low voltage switchgear : IEC 60439-1
Low Voltage breakers : IEC 60947-2

Functions of Prefabricated Substation

In any electricity distribution system, it is necessary to step up or step down the voltage at certain points. Electricity passes through substations to change voltages. While substations typically manage smaller voltages, with transformers stepping down the voltages, prefabricated substations can handle larger voltages and perform both step-ups and step-downs.

Prefabricated substations transform power from AC to DC and back to AC. It allows for higher currents when power stations and consumers are far apart from one another. Many can transform from AC to DC for high voltages, combating power loss.

These substations can save energy, which is good for the environment and consumers. Most prefabricated substations are high-voltage stations and can manage currents of medium voltage or lower levels of high voltage.

For example, at Varelen we offer a factory-manufactured compact substation. It can manage high voltages of 3.6-24kV and low voltages of 0.4kV. The substation is lightweight and appropriate for use in urban and rural areas.

Prefabricated substations are easy to ship and assemble. When installing a substation, choose a safe spot for the concrete pad. Avoid any nearby flammable materials and areas where explosions may occur. Set up the substation on the windward side of the main building. Finally, avoid areas with lots of people, and keep other factors like weather, the environment and wildlife in mind.

FAQ about Prefabricated Substation

Q1. What is a prefabricated substation?

A prefabricated substation, also called a compact substation, package substation, or unitized substation, is a factory-assembled electrical distribution system that integrates:

• Medium-voltage (MV) switchgear
• Distribution transformer
• Low-voltage (LV) switchgear
• Protection and control equipment
• Enclosure and ventilation system