Box Substation
Your Leading Shaanxi huadian electric co., Ltd. Supplier
Shaanxi huadian electric co., Ltd. It is located in Baoji high-tech development zone, Shaanxi province. A modern high-tech enterprise specializing in integrating research and development, manufacturing, and sales of vacuum circuit breakers.
Shaanxi huadian has nearly 10,000 square meters of circuit breaker production workshop, and has a fully automated control assembly line and a full set of imported circuit breaker testing equipment, with an annual production capacity of 10,000 units.
Why Choose Us?
High Quality
Our products every tiny part is made of the most suitable material，every single product comes out with strict inspection.
Advanced Equipment
Our has a fully automated control assembly line and a full set of imported circuit breaker testing equipment.
Good Service
We have complete pre-sales and after-sales service, professional team, 24 hours to serve you.
Technical Support
We has a professional research, and development team and a new product laboratory.
What is Box Substation？
Box type substation refers to an outdoor distribution device that installs high and low voltage switchgear and transformers together in a closed box. The main function is to provide the required electrical energy for high-voltage or low-voltage users.
Benefits of Box Substation
Space-saving
One of the primary advantages of using a box-type substation for power distribution is that it is space-saving. Traditional substations require a significant amount of space, which can be a challenge in urban areas where land is at a premium. Box-type substations, on the other hand, are compact and can be installed in smaller spaces. This makes them an ideal solution for urban areas where space is limited.
Easy to install
Another advantage of using a box-type substation for power distribution is that it is easy to install. Traditional substations require a significant amount of time and effort to install, as they involve the installation of multiple components. Box-type substations, on the other hand, are pre-fabricated and can be installed quickly and easily. This makes them an ideal solution for projects that require a fast turnaround time.
Low maintenance
Box-type substations are designed to be low maintenance, which is another advantage of using them for power distribution. Traditional substations require regular maintenance, which can be time-consuming and costly. Box-type substations, on the other hand, are designed to be self-contained and require minimal maintenance. This makes them an ideal solution for projects that require low maintenance.
Cost-effective
Box-type substations are also cost-effective, which is another advantage of using them for power distribution. Traditional substations can be expensive to install and maintain, which can be a challenge for projects with limited budgets. Box-type substations, on the other hand, are designed to be cost-effective and can be installed at a fraction of the cost of traditional substations. This makes them an ideal solution for projects with limited budgets.
Types of Box Substation
Assembly Type
Install the complete set of high and low voltage devices and transformers into metal boxes, and leave operating corridors in the high and low voltage distribution devices. This type of box transformer has a large volume and is rarely used nowadays.
Combination Device Type
Instead of using the existing complete set of devices, the high and low voltage control and protection electrical equipment are directly packed into the box, forming a whole. The design is considered maintenance free, with no operating corridors and a small box, also known as European style box transformers or ordinary box transformers.
One Body Type
Simplify the high-voltage control and protection devices, and put the high-voltage and low-voltage distribution devices and the main body of the transformer into the transformer oil tank together to form a whole, smaller, close to the oil immersed transformer of the same capacity, which is 1/3 of the European box type transformer. Also known as American style box transformer or compact box transformer.
European-style Box Substation Structure
The European high-voltage chamber of box substation is generally composed of high-voltage load switches, high-voltage fuses, and lightning arresters. It can perform the power-off operation and implement overload and short-circuit protection. The low-voltage chamber is composed of a low-voltage air switch, current transformer, ammeter, voltmeter, and other devices. There are two ways to form the box: lined up arrangement and triangle arrangement. The lined-up arrangement's high-voltage chamber and low-voltage chamber are relatively wide, which is convenient to realize the loop network power supply scheme of the loop network or dual power connection.
American-style Box Substation Structure
The structure of the American box-type combined transformer is divided into front and rear parts. The front part is a wiring cabinet. The wiring cabinet includes high and low voltage terminals, high voltage load switches, plug-in fuses, high voltage tap switch operating handles, oil level gauges, oil temperature gauges, and other devices. The rear part is the fuel tank, and the heat sink, the transformer winding, iron core, high voltage load switch, and plug-in fuse are all in the fuel tank. The box adopts a fully sealed structure.
Application of Box Substation
Voltage Transformation: Substations are used to transform voltage levels to facilitate efficient transmission and distribution of electricity. They can step up voltage for long-distance transmission to reduce energy losses and step down voltage for distribution to end-users.
Switching: Substations contain switches and circuit breakers that allow for the isolation and switching of electrical circuits. This is important for maintenance, repairs, and rerouting of power during outages or emergencies.
Distribution: Substations distribute electricity to various areas such as residential, commercial, and industrial zones. They help to regulate and control the flow of electricity to ensure reliable and stable power supply to consumers.
Protection: Substations include protective devices such as relays and fuses that detect faults and abnormal conditions in the electrical system. These devices help to isolate faulty sections of the network to prevent damage to equipment and ensure safety.
Monitoring And Control: Substations are equipped with monitoring and control systems that allow operators to monitor the performance of the electrical grid in real-time. These systems help in managing power flow, optimizing system efficiency, and responding to contingencies.
Power Factor Correction: Substations may include equipment for power factor correction to improve the efficiency of the electrical system by adjusting the ratio of real power to apparent power.
Integration Of Renewable Energy Sources: With the increasing integration of renewable energy sources like solar and wind power into the grid, substations play a vital role in interfacing these distributed generation systems with the main grid.
Grid Stability: Substations contribute to the overall stability of the electrical grid by providing voltage support, reactive power control, and other services that help maintain a reliable power supply.
Components of Box Substation
Transformer: It is a static electrical machine that serves to increase or decrease electricity in an AC electrical circuit, while maintaining a constant frequency and power.
Circuit Breaker: It interrupts and reestablishes the continuity of an electric circuit. Such interruption is made with load or short-circuit current.
Recloser: It is an electromechanical part that interrupts the current when there is an excess of electricity and acts when a fault is generated in the circuit. Reclosers are designed to operate with 3 closing operations and 4 openings with an interval between them.
Blade Fuses: They are connection and disconnection elements of electric circuits with a double function. On the one hand, as a blade disconnect, it switches on and off. On the other hand, it acts as a fuse protection element and is used when an overcurrent is registered.
Disconnect Switches And Test Switches: They serve to physically disconnect an electric circuit, so they usually operate without charge. These switches work mechanically and also manually.
Lightning Arresters: They are responsible for keeping ionized rays away. When there is a surge of a certain magnitude, lightning arresters form an electronic arc that makes the current discharge on the ground and not on people or equipment and installations.
Instrument Transformers: They are apparatuses responsible for measuring the electric current. There are two types: current transformers (CT), to change the value of the current, and potential transformers (PT), to transform the voltage values without taking the current into account. Both values are used in real time for measuring, control, and protection instruments that require current or voltage signals.
Junction Boxes: They are the connection terminals per phase that allow us to make derivations and to reach specific areas.
Condensers: They allow us to conserve the electricity that is produced in an electric field. Through two conductors separated by insulating material, energy is temporarily stored.
Inspection And Testing: Regular visual inspections and testing of substation equipment are performed to identify any signs of wear, damage, or potential issues. This includes checking circuit breakers, transformers, switchgear, relays, and other components.
Cleaning: Dust, dirt, and debris can accumulate on electrical equipment, affecting its performance and insulation properties. Cleaning involves removing these contaminants to maintain proper insulation and prevent overheating.
Lubrication: Moving parts in various substation components, such as circuit breakers and disconnect switches, may require lubrication to ensure smooth operation and reduce friction.
Electrical Testing: Various electrical tests are conducted to assess the insulation resistance, dielectric strength, and overall electrical integrity of the equipment. This helps in identifying potential faults before they lead to failures.
Calibration: Instruments and protective relays in the substation need to be calibrated regularly to ensure accurate readings and proper operation.
Thermographic Inspection: Infrared thermography is used to detect overheating in electrical components. Hotspots may indicate issues with connections or insulation and addressing them promptly can prevent equipment failures.
Oil Analysis: For oil-filled equipment like transformers, regular oil analysis is performed to assess the condition of the insulating oil and identify any signs of deterioration or contamination.
Preparedness: Maintenance also involves ensuring that the substation is prepared for emergency situations. This includes testing backup power systems, verifying the functionality of protective relays, and having contingency plans in place.
Record Keeping: Maintaining accurate records of maintenance activities, test results, and equipment history is crucial for tracking the performance of the substation over time and planning future maintenance.
How to Solve the Heat Dissipation Problem of Box-Type Substations?
Clean up the residual material inside the box changer in time, such as particle dust. Solve security and dust problems.
Strengthen the temperature monitoring of each piece of equipment in the box, and issue a high-temperature warning signal in time. In this way, once the temperature is overheated, the ventilation can be strengthened in time and effectively to dissipate the heat and reduce the temperature. It will be better if the detection system can detect humidity, voltage, current, and other data at the same time.
Air cooling. Air cooling is the most common heat dissipation method. The box-type substations produced by our Zhongtian Electric are equipped with exhaust fans in the transformer and low-voltage room. The transformer room has an automatic temperature monitoring system, which can effectively control the temperature in the box-type substation;
Do not open the door for ventilation and heat dissipation. Opening the door for ventilation will lead to the entry of dust and dirt, and will also trigger special protection, which cannot guarantee safety. For ventilation and dust prevention, these two issues affect each other and restrict each other.
Air conditioning cooling and cooling. Install an air conditioner for our box-type substation. Needless to say, the cooling effect of the air conditioner is much more efficient than the fan.
Add a layer of reflective material to the surface of the box changer shell. Another important reason for the increase in temperature in the box-type substation is largely caused by solar radiation. Therefore, it is processed on the outside of the box-type substation, and the reflective material is sprayed to reflect the infrared band in the sunlight. The internal temperature of the shell-type substation will naturally decrease.
Increase the capacity of the box-type substation. Considering this problem when designing the box-changing shell, the capacity of the box-changing shell is designed to be more generous, so that the space between the various internal devices is more relaxed, which facilitates the heat dissipation of the device, and can make the device better cool down, avoid The equipment is paralyzed due to high temperature.
4 Key Factors Of The Substation Design Process
Substation Physical Appearance
It is usually favorable to locate distribution substations as close to the load center of its service area as possible, but this is often difficult to achieve. Locations that are ideal from a cost and engineering point of view are occasionally restricted due to aesthetic, neighboring, electrical, or physical considerations. Given the required low and high voltage requirements and the recommended power capacity, a lower cost above-ground design will meet your power supply needs. However, designs that are above ground will require overhead sub-transmission line structures, which are not ideal for neighborhoods. Instead, neighborhoods often opt for underground cables, but these can be more expensive within the substation design process.
Substation Standardisation
Guides, recommended practices, and standards are used in communicating requirements for the maintenance, operation, installation, and substation design process. Standards are used in order to determine a figure agreed by the substation community of alternative solutions from various different solutions. This gives purchasers the opportunity to choose a specific standard solution with the knowledge that different vendors will be able to supply it and operate with the different products from that vendor. This also allows vendors to prepare several solutions in the knowledge that many customers will be able to specify them.
Site Planning
Once the substation planning has been finished with the acquired real estate, a scaled site plan will be made in order to establish the right of way access for distribution lines, transmission lines, roads and other utility access, including telecommunications, gas, sewer, and water supplies. The site plan will also lay out the whole footprint with the location of major substation equipment and fencing. Before the site plan can be completed, however, the configuration of the substation design process and layout will need to be established, which will determine if the substation will be a ring bus, a transfer and main bus or a single bus configuration.
Restricting Access
Restricting site access will limit the movement of people in and out of the substations, which will reduce the likelihood of accidents occurring. Allowing visitors access to the substation or storing materials and equipment into any spare space on the premises will lead to an increase in the number of people that can access restricted areas. Not all of these people will be aware of the potential imperceptible electrical hazards in the environment that aren’t identified by fencing or labels. In this case, escorted access is advised.
Our Factory
Shaanxi huadian electric co., Ltd. It is located in Baoji high-tech development zone, Shaanxi province. A modern high-tech enterprise specializing in integrating research and development, manufacturing, and sales of vacuum circuit breakers.
