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Intelligent Box Type Power Distribution Substation

Box-type substation is a compact complete set of power distribution equipment that combines high-voltage switchgear, distribution transformer and low-voltage switchgear according to certain wiring schemes. Main components: transformers, high-voltage switchgear and its control equipment, low-voltage switchgear and its control equipment, corresponding internal connecting lines (cables, bus bars, etc.) and other auxiliary equipment.

This product is a series of products designed and produced by our company based on the introduction of domestic and foreign advanced electrical manufacturing technology to meet the needs of urban and rural power grid construction. It has the characteristics of small size, compact structure, intelligent operation, safety and reliability, and short on-site installation and debugging time. It can replace traditional substations. It can meet the requirements of users for electric energy measurement, reactive power compensation, and high and low voltage solutions, and represents the development direction of small and medium substations. This product is suitable for 10kV/50Hz/30~1600kVA power users in industrial and mining enterprises, docks, airports, public places, high-rise buildings and residential areas.

Product:Distribution Box Electrical Boxes,Box Type Prefabricated Substation

Rated Voltage:10KV,40.5kV,13.2KV,10KV~40KV,6kv To 35kV

Application:Electric Power Transmission

Frequency:50/60Hz

Standard:IEC60076,IEC60439,IEC Standard,JB/T,CQC

Material:Stainless Steel,Copper,aluminum-zinc Plate

Usage:Power

Phase:Three

Rated Current:Customized

Operation of Box Substation

1. The box type substation should be placed at a relatively high place, not in low-lying areas, to prevent rainwater from entering the box and affecting equipment operation. When pouring concrete platforms, gaps should be left on the high and low voltage sides to facilitate the laying of cables in and out. When excavating the foundation, if encountering the ground formed by the accumulation of garbage or corrosive soil, it must be excavated to solid soil, then backfilled with good soil quality and compacted, and then filled with three layers of soil or gravel to ensure the stability of the foundation.

2. The grounding and neutral connection of the box type substation share a common grounding network. The grounding grid generally adopts the method of driving grounding piles at the four corners of the foundation, and then connecting them as a whole. There must be two reliable connections between the box type substation and the grounding grid. After operation, the grounding connection should be checked regularly to ensure it is not loose or corroded. Regularly measure the grounding resistance, not exceeding 4 Ω.

3. The box type substation mainly adopts natural air circulation cooling. Therefore, debris should not be piled up around it, especially the transformer room door. Louver ventilation holes should also be regularly removed to ensure that the equipment does not exceed the maximum allowable temperature.

After the low-voltage circuit breaker trips, the cause should be identified before power can be transmitted to prevent the accident from expanding.

5. The high-voltage chamber of the box type substation should be equipped with zinc oxide lightning arresters, and the installation method should be convenient for testing and replacement.

6. Equipment such as ring network switches, transformers, lightning arresters, etc. in the high-voltage room should be regularly inspected and maintained, defects should be discovered and dealt with in a timely manner, and insulation preventive tests should be conducted regularly. If it is discontinued for more than 3 months and is put into operation again, a full project preventive test should be conducted.

7. To replace a high-voltage fuse without breaking capacity, the transformer must be powered off, and the mechanical interlock must be properly released during operation, and an insulated operating rod must be used.

8. All incoming and outgoing cable holes of the box type substation should be sealed to prevent small animals from entering and causing accidents.

9. Must have a warning sign of "high voltage danger" and a nameplate number for electrical equipment

Configuration of high-voltage side of box transformer

(1) The box transformer is divided into terminal type and ring network type based on the primary wiring method on the high-voltage side. The terminal type box transformer does not need to consider additional wiring: if the high-voltage side is one in multiple out or multiple in one out (mostly one in two out or three out, or two in one out or two out), it can be considered as a ring network type box transformer.

(2) European style box transformers have circuit breaker configurations on the high-voltage side, as well as load switch fuse combination protection. Considering the cost of box transformers, for box transformers with a capacity not exceeding 800 kV · A and low requirements for high-voltage side protection configuration, the latter is often used.

(3) The high-voltage load switches configured in European style box transformers are mostly FLN-12 sulfur hexafluoride load switches.

(4) The rated current of the high-voltage fuse melt for protection is selected according to the following formula:

Irr=KIgmax

In the formula, Irr - rated current of the melt, A; K - coefficient, generally taken as 1.3:

Igmax - Rated current on the high-voltage side of the transformer.

(5) Considering the safety of operation and maintenance, the high-voltage side configuration of European style box transformers should meet the following requirements.

① When the load switch is disconnected, there is a grounding device to ensure maintenance safety.

② The load switch and isolation switch ensure mutual locking to ensure safe operation.

(6) Due to the combination of high-voltage load switch and fuse, the American style box transformer is assembled in the same oil immersed box, including position load switch, backup fuse, plug-in fuse, and transformer. The ring network type is achieved by converting the internal connection terminals of the position load switch.

Automatic reactive power compensation device for box transformer

According to the current national standards, the reactive power compensation capacity is generally required to be configured at 30% of the transformer capacity, which is of course meeting the requirements for high natural power factor usage conditions. However, with the rapid popularization of inductive household appliances such as air conditioners, washing machines, refrigerators, and energy-saving lighting fixtures, sometimes it is not possible to achieve the expected effect when configured according to 30% of the transformer capacity. Therefore, it is advisable to configure according to 40% to 60% of the transformer capacity and automatically compensate in 10 control circuits. Although the cost has increased, the cost is relatively insignificant compared to the entire box transformer, and the compensation effect is good.

Configuration of low-voltage outgoing cabinet

The number of circuits in the low-voltage outgoing cabinet of the box transformer is generally determined based on the load distribution in its power supply area and appropriate reservation of 1-3 circuits. The specifications and models of circuit breakers selected for each circuit are determined based on their corresponding calculated loads. The selection and setting requirements of low-voltage circuit breakers for each feeder are similar to those of the transformer main circuit breaker. But the prerequisite is to know the calculated load current of each feeder. Only then can reasonable configuration be achieved.

PRODUCT PHOTO

Conditions of Use:

1. The highest ambient temperature does not exceed 45℃, and the lowest does not exceed -45℃;

2. The altitude shall not exceed 1000m. If special customized transformers and low-voltage components are used, the height can reach 4000m;

3. Placed in a place where the vertical inclination does not exceed 5° and there is no severe vibration or impact;

4. The air humidity is not more than 90% (+ 25℃);

5. Gas places must not conduct dust, explosion hazard, corrosion of metal and electrical components;

6. Outdoor wind speed shall not exceed 35m/s.

7. If the above-mentioned normal use environmental conditions are exceeded, the customer can customize it from our company

FACTORY WORKSHOP

COMPANY OVERVIEW

EXHIBITION

Order instructions

1. Conceptual diagram of main circuit or electrical schematic diagram.

2. Model, specification and quantity of main components.

3. Way of incoming and outgoing wires, cable specifications, etc

4. Shell material and appearance: composite board, steel plate, stainless steel plate, cement board, etc.

5. Other order requirements.

This product is usually customized.

We are a manufacturer and have a professional technical department that can design and provide solutions according to customer needs.

Please contact our sales personnel to obtain design drawings

Here are our customer examples for your reference

Afghan clients

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Our advantage is to have a unified brand image system, marketing system, and standard training system to ensure the reputation of our Medium Voltage Distribution Combined Substation Power Transmission/Supply Substation,. To our partners, we provide strong impetus for a healthy industry environment through win-win strategic collaborations. Since its establishment, our company has been pursuing the novelty and usability of products as the enterprise development goal and to establish the industry image.