Compact Electrical Transformer Substation

Compact Electrical Transformer Substation

Product description

Box-type prefabricated substation, used for high-voltage/low-voltage equipment, compact equipment transformer combination. Widely used in urban high-rise buildings, urban and rural buildings, residential areas, factories, parks, airports, railways, oil fields, shopping malls and

Temporary buildings and other outdoor places. Used for the reception and distribution of electric energy in the power distribution system.

Feature:

-Including independent high voltage room, transformer room and low voltage room;

High-voltage wiring can be used in ring networks, terminals and dual power supplies, with flexible power supplies and high reliability;

-The transformer can be dry-type or oil-immersed transformer with excellent performance: low loss, low noise, low temperature rise, high overload capacity, strong short-circuit resistance, and strong impact resistance;

-The low-pressure room has the overall function of a complete set of low-voltage equipment.

Applicable conditions:

Altitude: ≤2000m

Ambient temperature: -35ºC~+40ºC

Relative humidity:

Daily average ≤95%

Monthly average ≤90%

Earthquake resistance: 8 degrees

How to configure a box type substation

1、 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.

2、 Configuration of low-voltage main distribution cabinet for box transformer

The low-voltage main distribution cabinet of the box transformer generally needs to be equipped with an incoming low-voltage isolation switch, a low-voltage main circuit breaker, and a low-voltage main metering device. The low-voltage isolation switch must be installed to meet the needs of daily maintenance and repair. The low-voltage main circuit breaker is selected based on the transformer capacity and the short-circuit current at the installation location of the circuit breaker.

3、 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.

4、 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 allocation be achieved

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FAQ

Q5 : Is OEM/ODM available?

A: Yes, it is! Our products can be Customized. We have design and engineer teams,we can customize products according to customers' drawing or requirements.

Q6 : You are manufacturer or trading company?
A: We are factory, As a 100% professional manufacturer with 20 year's manufacturer experience, we could produce products according to customers' requirements and we could also control the quality of products 100%.

Q7 : Can the price be negotiated?

A: Yes, the price is negotiable. It can be changed according to your quantity or package

Q8 : How about inspection?

A: We have the whole inspection system from raw material to end products include temperature rise test,salt spraying test conductor type test,mechanical life test.

Q9 : What is payment terms?

A: T.T, Paypal,Western Union,Alibaba trade assurance and L/C is acceptable. 30% T/T in advance ,70% balance before shipment.

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Order instructions

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

2. Model, specification and quantity of main components.

3. Ways 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

Kazakhstan Customers

Welcome to inquiry

Contact information:

Jiyuan Fengyuan Electrical Equipment Co., Ltd

Sales Department

Contact person:Mr Charles Du

E-mail:fengyuan800@outlook.com

Mobile:+8618639199897(Available for whatsapp,wechat,skype)

Add:Huling industrial zone,jiyuancity,henan province,China

TEL:+86-0391-2180800

FAX:+86-0391-2180818

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