Box Type Transformer Substation

Box Type Transformer Substation

Product description:
Box type transformer substation is a compact complete set of distribution equipment that combines high-voltage switchgear, distribution transformer and low-voltage switchgear according to certain wiring scheme. Main components: transformer, high-voltage switchgear and its control equipment, low-voltage switchgear and its control equipment, corresponding internal connecting wire (cable, busbar, etc.) and other auxiliary equipment.

Specification of box type transformer substation:

1.Rated voltage:20kV

2.Maximum operating voltage:24kV

3.Rated current:400A

4.Rated short time current:16kA

5.Rated power frequency withstand voltage:50kV

6.Rated impulse withstand voltage (peak value):125K

7.Insulating medium:SF6/air

8.Protection class:lP4x

Product technical features:

(1) it is made of modularization and moved by vehicle, featuring compact structure, convenient transportation, perfect equipment, flexibility, reliability and convenient maintenance

(2) flexible shell configuration, can use metal or non-metal shell;

(3) the high voltage adopts fast and reliable high voltage SF6 load switch -- fuse combination electric appliance;

(4) the transformer adopts intelligent capacity adjustment and voltage regulation transformer to realize remote control, automatic fine compensation, automatic voltage regulation and protection functions.

(5) low voltage adopts DJ series dynamic reactive power fine compensation device to realize dynamic compensation of reactive power;

(6) intelligent design to meet the requirements of distribution automation, box change comprehensive automation and box change state maintenance;

(7) the box variable shell adopts the independent patented technology to produce, with the ability to prevent wind and sand, dust and efficient heat dissipation design.

Purchase tips of the box type Prefabricated substation

1. High voltage

Way of incoming line: terminal type, looped network type or double power in.

With the high pressure measurement or not. The position of the measurement(front of the switch or behind the switch), the requirement of the meter gauge and its supplier.

Type of the HV switch, one way is using the high voltage vacuum load switch and the fuse-combination unit which is the mainly used and its price is more economical; the other is adopting the disconnector switch and the vacuum breaker which is used in the high capacity transformer with higher price.

2. Transformer

The transformer type, serial-number, the connection symbol group, capacity and the impedance voltage of the transformer.

3. Low voltage

Grade of the switch(Supplier).

The number of the outlet and the rated current value of every outlet switch.

With the compensation or not, and the capacity of the compensation.

With the measurement or not and the position.

4. Type of the busbar (copper or aluminum)

5. Layout of the transformer substation(with the operation corridor or not)

6. The material of transformer shell: composite board (commonly used), steel plate, stainless board or cement.

7. Delivery Period for European-type prefabricated substation

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.

The low-voltage main circuit breaker of transformers generally adopts frame type intelligent circuit breakers, and the selection and setting requirements are as follows:

(1) The rated current of the circuit breaker. Generally, 2.0-2.5 times the capacity value of the transformer is sufficient. The corresponding rated breaking current is greater than the short-circuit current value on the low-voltage side of the transformer, and calibration is rarely required.

(2) Long time delay (i.e. inverse time, overload) overcurrent release setting current Lset, required to meet In ≤ Iset1 ≤ Iz. Among them, In is the rated current on the low-voltage side of the transformer, and Iz is the current carrying capacity of the low-voltage busbar. To fully utilize the capacity of the transformer without affecting its service life, Iset1 should be equal to or close to In.

(3) Short time delay (i.e. fixed time limit, overcurrent) overcurrent and release setting current Iset2, required to meet 1.2Ifj ≤ Iset2 ≤ Id/1.3. Among them, Ifj is the short-term load peak current of the transformer, and Id is the single-phase grounding fault current of the transformer. This requirement is easy to meet for transformers connected to D and yn11, but not for transformers connected to Y and yn0. This is also why box transformers often use D and yn11 transformers. The setting time of the short delay overcurrent release of the transformer low-voltage main circuit breaker is generally 0.6 seconds, which can ensure that the time difference with the next level circuit breaker is not less than 0.2 seconds.

(4) Instantaneous overcurrent release setting current Iset3. Due to the short delay overcurrent protection, in order to ensure better selectivity, the Iset3 value can be set higher, usually taking Iset1, which is 12-15 times the value.

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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EXHIBITION

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.

Q10 : What is the service offered by company?

A: We have the professional engineer team which can design and develop the mold to arrive different customer requirement.

We also have the sales team to offer good service from pre-sale to after-sale.

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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

Uzbekistan customer

Datasheet

1.1 710-512-01-MVS1 Main Substation

Incoming Switchgear A01 B01 2

No Components Specification Unit Qty Maker

1 VCB

HVX12-50-31-F 275mm

Altitude ≤2000m

Opening voltage DC220V

Closing voltage DC220V

Energy storage voltage DC220V

Set 1 China

2 VT JDZ-10 10KV/√3/0.1KV/√3 Set 3 China

3 CT

LZZBJ9-12 3000/1A 5P20 10VA

5P20 5VA 5Fs5 5VA

Set 3 China

4 High voltage fuse XRNP1-12 0.5A Pc 3 China

5 Lightning arrester HY5WZ-17/50 Set 3 China

6 Intelligent control panel WY-9008A Pc 1 China

7 Short circuit and ground fault indicator EKL-4-1 Pc 1 China

8 Multifunctional electric instrument PD666-3S3 380V 5A Pc 1 China

9 Primary harmonic eliminator LXQ-12KV Pc 1 Fengyuan

10 Charged display DXN-12Q Pc 1 China

11 Temperature and humidity controller WY-CS-III Pc 1 China

12 Connecting piece JY-2 Pc 3 China

13 Junction box PJ1 Pc 1 China

14 Metering bracket Universal type Pc 1 China

15 Signal lamp ND16-22D/4 AC380V red Pc 1 CHNT

16 Signal lamp ND16-22D/4 AC380V green Pc 1 CHNT

17 Signal lamp ND16-22D/4 AC380V white Pc 1 CHNT

18 AC miniature circuit breaker NB1-63/2P C6A 6kA(R) Pc 2 Fengyuan

19 AC miniature circuit breaker NB1-63/3P C3A 6kA(R) Pc 1 Fengyuan

20 DC miniature circuit breaker NB1Z-63 2P C6 Pc 1 Fengyuan

21 AC miniature circuit breaker NB1-63/3P B2A 6kA(R) Pc 1 China

22 Universal test terminal RURTK/S Pc 30 China

23 Universal terminal block RUK 5B Pc 18 China

24 Cabinet top small bus Ø 6 copper bar m 11 Fengyuan

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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