YB type (European Transformer) pre-installed box-type substation is a new type of power distribution device that is more economical and affordable in today's power distribution system. It is a combination of high-voltage switchgear, transformers, and low-voltage switchgear. The mobile prefabricated transformer and distribution substation device assembled in the manufacturing plant is a new type of product specially designed and manufactured for my country's urban power distribution network. It has excellent performances such as reliable power supply, reasonable structure, low investment, small size, simple installation, elegant appearance, convenient operation and maintenance. It can go deep into the load center directly, and the purpose of power transmission can be realized after one installation. This series of products is suitable for substations with a rated voltage of 6-35kV, a rated frequency of 50Hz, and a rated capacity of 1250kVA or below. Therefore, it is widely used in residential quarters, high-rise buildings, tourist attractions, highways, industrial and mining enterprises, oilfield terminals, and urban public power distribution in places where land is tight.

This product complies with GB3906, DL/537, ZBK40001, SD320, GB/17467 and other standards.

Model Description

Use environmental conditions

1. The altitude does not exceed 2000m.

2. The upper limit of ambient temperature is +40°C, and the lower limit is -30°C.

3. The daily average relative humidity is not more than 95%, and the monthly average relative humidity is not more than 90%.

4. The outdoor wind speed does not exceed 35m/s.

5. It should be installed in a place without fire, explosion hazard, serious pollution, chemical corrosion, and severe vibration, and the vertical inclination of the installation should not exceed 5%.

Main skill parameters

Product Features

1. The shell is made of glass fiber reinforced special cement material, which has good performance of sun resistance and heat insulation. Composite board material can also be used

2. It has the characteristics of antifreeze, anti-condensation, anti-crack, anti-corrosion, fire-proof and flame-retardant.

3. The wall is solid, the surface layer is dense and uniform, the service life is long, maintenance-free, and the sealing is good, which can effectively prevent the intrusion of noise and dust.

4. It has strong mechanical strength and good impact resistance.

5. The shape is beautiful, and the color of the shell adopts the advanced exterior wall paint imported from abroad, and the main color of the exterior wall can be

6. Match according to the color of the surrounding buildings. Commonly used colors are: almond yellow, camel gray, pink, white and other colors; the top of the cabinet has sky blue, red, red bean paste and other colors; bricks and tiles are red, green, black, etc.

Structural Features

1. The detachable partition between the high-voltage room, the transformer room and the low-voltage room divides the whole box into three independent small rooms. There are windows for wires and cables to pass between the small chambers. The high and low voltage chambers are assembled from components or molded cabinets. The final assembly only needs to carry out the electrical connection between the three chambers and their respective fixed connections.

2. The box-type substation adopts the complementary heat dissipation form of forced ventilation and natural ventilation. Holes are opened on the steel plate at the bottom of the transformer room, and the top is covered with mesh. There are exhaust holes around the roof to ensure good natural ventilation. In the transformer room There are four exhaust fans on the top. The start and stop of the exhaust fans can be controlled manually, or can be automatically controlled by the temperature control device according to the temperature of the transformer oil surface according to the requirements, so as to ensure that the transformer can run at full load.

3. The top cover adopts a double-layer, inclined roof structure, which has the function of heat insulation to reduce the temperature rise in the box substation caused by sunlight, and ensures that the top of the box does not seep water or drip.

4. According to the power supply characteristics and user requirements, the equipment of the high-voltage circuit adopts various types of load switches with mature technology at home and abroad and reliable performance; Wiring mode, high-voltage metering cabinet can be installed, and there is a perfect anti-misoperation function.

5. Low-voltage switchgear can be selected according to the scheme provided. The low-voltage room has multiple functions such as power distribution, lighting distribution, reactive power compensation, electric energy metering and power measurement.

6. Both the high and low voltage sides adopt the cable entry method.

7. There are sufficient lighting facilities in each room of the box substation, and sockets can be installed in the low-voltage room according to user requirements for future inspection and maintenance.

8. The hoisting of the box transformer can adopt upper hoisting or lower hoisting according to user requirements.

Dimensions and foundation diagram

Transformer performance parameters and dimensions

Internal Structure

Installation, use and maintenance

Install

1. After the product arrives at the installation site and is unpacked, first check whether the appearance is bumped or deformed, whether the internal electrical components and connections are damaged, falling off, or loose, and whether the accompanying documents and spare parts are complete.

2. According to the product installation size and GB 232 "Code for Construction and Acceptance of Electrical Installation Engineering", prefabricate the base, cable chamber, and pre-embed the grounding system and grounding screws.

3. After the box-type substation is hoisted and installed on the foundation, the anchor bolts shall be strengthened, and the grounding screws of the box-type substation shall be firmly connected with the grounding screws of the foundation.

Before the device is put into operation, the following inspections and tests are required:

1. Check whether the electrical equipment and wiring inside the switch cabinet meet the requirements of the drawings, whether the wire ends are marked with numbers, and whether the wiring is neat and firm.

2. Check whether the installed electrical equipment is in good contact and whether it meets the technical conditions of the electrical equipment itself.

3. Whether the main contacts of the main electrical appliances are reliable and accurate.

4. Check and test whether all meters and relays operate correctly.

5. Check whether the operation mechanism is normal, flexible and reliable, and whether the electrical and mechanical interlocks are normal.

6. Control the temperature of the transformer room to indicate whether the controller has been adjusted to the allowable use temperature of the transformer room, and the allowable use temperature of the transformer is 48°C.

7. Whether the resistance of the protective grounding point is less than 0.1Ω.

8. Test the performance of the transformer according to the regulations.

9. After installation, temporarily block the cable hole.

10. The grounding wire of the arrester is directly connected to the grounding screw of the grounding system.

Run

The box-type substation should be put into operation according to the parameters specified on its nameplate. The steps of putting into operation are as follows:

A. Make sure that all switches are in the open position;

B. Close the load switch of the branch circuit of the two ring networks (for the incoming line of the ring network):

C. Turn on the transformer branch switch and observe whether each live display is charged;

D. If there is no abnormality, first operate the voltage conversion switch on the front panel of the low-voltage side (or directly observe the three-phase voltmeter) to observe whether the three-phase voltage on the low-voltage side is balanced and whether the indication is normal;

E. When the voltage is normal, close the main incoming line switch on the low-voltage side:

F. When there is no abnormality, close the branch switch one by one, and observe the pointers of each ammeter to see if the indication is within the normal range;

G. When the box-type substation is out of operation, the above steps can be carried out in reverse order.

The interlock function of the high-voltage cabinet is as follows;

A. After the load switch is closed, the grounding switch cannot be closed and the switch cabinet door cannot be opened;

B. When the grounding switch is closed, the load switch cannot be closed;

C. When the load switch is opened, the grounding switch is closed and the switchgear can be opened;

D. When the incoming cabinet needs to be overhauled, it must be confirmed through the high-voltage live display and high-voltage testing pen that each phase is not charged, and the grounding wire can be hung before entering.

The exhaust fan in the transformer room is automatically put into operation when the transformer oil surface temperature exceeds the upper limit setting value, and the fan automatically stops when the oil level reaches the lower limit setting value (for the automatic control system).

During the operation of the product, it should be determinedPeriodic inspections, problems should be resolved in a timely manner. Maintenance

The products should be repaired and maintained regularly, and the high and low voltage switchgear, power transformer, cable and metering system should be carried out in accordance with the electrical regulations and electricity regulations.

If an oil-immersed transformer is used, sampling analysis should be carried out at least once a year according to regulations during commissioning. If the transformer needs to be hoisted outside the box, it can be hoisted from the top, and the capacity below 630kVA can also be pushed out from the door.

After the high-voltage switchgear has been opened and closed 20 times with full load or 2000 times with no load, the contact condition of the contacts and the consumption of the arc extinguishing device should be checked. If there is any abnormality, it should be repaired or replaced in time. After the low-voltage switchgear trips automatically, the cause of the fault should be checked and analyzed, and the switch can be re-closed and put into operation after being discharged.

The arrester should be tested for preventive performance before and after the annual thunderstorm season.

Only when the cable end of the incoming line is grounded and the incoming side is not charged can it enter the high-voltage cabinet for maintenance.

The transformer room and low-voltage room can be inspected only when the load switch of the transformer branch of the high-voltage cabinet is opened (with obvious breaking points) and the grounding switch is closed. (The key to the transformer room is stored in the transformer branch high-voltage cabinet)

Complete set of products

The switchgear comes with a packing list, product certificate, instruction manual, and necessary drawings, and the accessories include door keys and spare parts provided according to the supporting list.

Order Notes

Please provide the following information when ordering: box-type substation structure, housing requirements; high and low circuit main wiring schemes and electrical component models, parameters; transformer model, capacity and voltage level; Name and quantity; other special requirements.

Main Circuit Scheme