30-2500kVA High Efficiency Transformer, Energy-Saving with Low Losses

• Customization: Available
• Application: Power, Electronic
• Phase: Three
• Model NO.: S-M Series 11kV Oil immersed transformer
• Core: Core-type Transformer
• Cooling Method: Oil-immersed Type Transformer
• Winding Type: Multi-winding Transformer
• Certification: ISO9001, CE
• Usage: Power Transformer, Distribution Transformer
• Frequency Characteristics: Power Frequency
• Shape of Core: OD
• Brand: Golden Triangle
• Efficiency: High Efficiency
• Losses: Low Losses
• Rated Capacity: 30-2500kVA
• High Voltage: 6, 6.3,6.6,10,10.5,11
• Tap Range: +-2*2.5,+-5
• Low Voltage: 0.4
• Transport Package: Wooden Box
• Specification: Silicon steel Core
• Trademark: Golden Triangle
• Origin: China
• HS Code: 8504210000
• Production Capacity: 12000 Pieces/Year
• Package Size: 75.00cm * 70.00cm * 65.00cm
• Package Gross Weight: 450.000kg

Product Description

Transformer Introduction

A transformer is an electronic electrical instrument, mainly consisting of primary coils, iron core, secondary coils, etc. It utilizes the Faraday electromagnetic induction principle to change alternating voltage, enabling matching conversion of input and output current, voltage and impedance, and also achieving physical isolation between the primary and secondary sides. Depending on the different voltages of the primary and secondary sides, transformers can be classified as step-down transformers, step-up transformers, isolation transformers, etc. A transformer is composed of an iron core made of silicon steel sheets (or silicon steel) stacked together and two sets of coils wound around the iron core. The iron core and the coils are mutually insulated from each other, with no electrical connection. The coil connected to the power supply side when connecting the transformer is called the primary coil (or primary side), and the coil connected to the electrical equipment is called the secondary coil (or secondary side)

Product Description

oil transformer

The oil-immersed transformer is a new type of high-performance transformer with a more reasonable structure and better performance. It uses oil as the main insulation medium and relies on oil as the cooling medium, such as oil-cooled self-cooling, oil-cooled air-cooling, oil-cooled water-cooling, and forced oil circulation, etc. The main components of the transformer include the iron core, windings, oil tank, oil reservoir, respirator, explosion-proof tube (pressure release valve), heat sink, insulation bushing, tap changer, gas relay, thermometer, and oil purifier, etc.
Due to the long-term immersion of the silicon steel sheets in the transformer, oil can seep into the interlayers, and the transformer oil has elasticity to act as a buffer. Therefore, the oil-immersed transformer has low noise. However, the voltage regulating switch is inside the oil tank. When adjusting the voltage, the contact condition of the switch cannot be seen outside. If the contact is not good, it is equivalent to a break in that circuit. If the contact is poor, when the load is too large, the switch is prone to burn out.

Transformer normal service conditions

type of cooling

1.The height above the sea level is below 1000m;

2.Highest air temperature +40ºC;

3.Highest daily average air temperature+30ºC;

4.Highest annual average air temperature +20ºC;

5.Lowest outdoor air temperature -25ºC.

Two-year warranty

15 years of accumulated experience

More than three certification certificates

(1) Oil-immersed transformers usually adopt three cooling methods: oil-immersed self-cooling, oil-immersed air-cooling, and forced oil circulation.
The oil-immersed self-cooling method relies on the natural convection of oil to dissipate heat.

(2). The oil-immersed air-cooling method is based on the oil-immersed self-cooling method, and additional fans are added to blow air into the oil tank and oil pipes to enhance the heat dissipation effect. Forced oil circulation uses an oil pump to extract the hot oil from the transformer, cool it outside the transformer, and then send it back into the transformer.

structure function

In the main substation of the urban rail transit power supply system, the main transformer usually adopts a three-phase oil-immersed transformer. The oil-immersed transformer mainly consists of the core, windings, oil tank, voltage regulating device, radiator, oil reservoir, gas relay, insulation bushing, explosion-proof tube, etc.

1. Core
The core is composed of silicon steel sheets stacked together with good magnetic conductivity. It forms a magnetic flux closed circuit, and the primary and secondary windings of the transformer are wound on the core.
The transformer core is divided into two structures: core type and shell type. Currently, the widely used transformers are of core type. The core of the core type transformer consists of the core column and the yoke. The core of the oil-immersed transformer has oil channels inside for cooling the core, which facilitates the circulation of transformer oil and also enhances the heat dissipation effect of the equipment.
2. Winding
The winding, also known as the coil, is the conductive circuit of the transformer. It is made by winding copper wire or aluminum wire into multiple layers of cylindrical shapes. The primary and secondary windings are concentrically arranged on the core column and are insulated from each other. The low-voltage winding is usually inside and the high-voltage winding is outside. The insulating material is wrapped around the wire to ensure insulation between the wires and between the wires and the ground.

3. Oil Tank
The oil tank is the outer shell of the oil-immersed transformer. Besides holding oil, it is also used to install other components. [2]
4. Voltage Regulator
The voltage regulator is set up to ensure the stability of the secondary voltage of the transformer. When the power supply voltage fluctuates, the voltage regulator is used to adjust the tap switch of the transformer to ensure the stability of the secondary output voltage. The voltage regulator is divided into on-load voltage regulator and off-load voltage regulator.

5. Radiator
The radiator is installed on the oil tank wall. The upper and lower parts are connected to the oil tank through pipes. When there is a temperature difference between the upper and lower oil temperatures of the transformer, the radiator forms oil convection, and the cooled oil flows back to the oil tank to reduce the temperature of the transformer oil. To improve the cooling effect, measures such as self-cooling, forced air cooling, and forced water cooling can be adopted.

6. Oil Sump
The oil sump is also called the oil tank. Transformer oil will undergo thermal expansion and contraction due to temperature changes, and the oil level will rise or fall accordingly. The function of the oil sump is to provide a buffer for the thermal expansion and contraction of the oil, keeping the oil tank always filled with oil; at the same time, due to the presence of the oil sump, the contact area between the oil and air is reduced, which can slow down the oxidation of the oil.
7. Gas Relay
The gas relay, also known as the gas protection relay, is the main protection device for internal faults of the transformer. It is installed in the middle of the connecting pipe between the oil tank and the oil sump. When a serious fault occurs inside the transformer, the gas relay connects the circuit breaker trip path; when a less serious fault occurs inside the transformer, the gas relay connects the fault signal circuit.
8. Insulation Bushing
The high and low insulation bushings are located on the top cover of the transformer oil tank. For oil-immersed transformers, porcelain insulation bushings are generally used. The insulation bushing's function is to maintain good insulation between the high and low voltage windings leads and the oil tank, and to fix the leads.
9. Explosion-proof Tube
The explosion-proof tube, also known as the safety air passage, is installed on the transformer's oil tank. Its outlet is sealed with a glass explosion-proof membrane. When a serious fault occurs inside the transformer and the gas relay fails, the gas inside the oil tank will break through the glass explosion-proof membrane from the safety air passage and prevent the transformer from exploding. 

technical specification

Rated capacity (kVA)	High volatge (kV)	Tap range	Low voltage (kV)	Connected group label	No-load loss (w)	Load loss(75℃) (w)	No-load current(%)	Impedance voltage(%)
30	20	±2*2.5±5	0.4	Dyn11 Yzn11 Yyn0	80	690/660	0.3	5.5
50					104	1010/960	0.24
63					120	1200/1150	0.23
80					144	1440/1370	0.22
100					160	1730/1650	0.21
125					192	2080/1980	0.2
160					232	2540/2420	0.19
200					272	3000/2860	0.18
250					320	3520/3350	0.17
315					384	4210/4010	0.16
400					456	4970/4730	0.16
500					544	5940/5660	0.16
630					648	6820	0.15
800				Dyn11 Yyn0	784	8250	0.15	6.0
1000					920	11330	0.14
1250					1100	13200	0.13
1600					1330	15950	0.12
2000					1560	19140	0.11
2500					1870	22220	0.11

Notice!!!!

Kindly provide the essential details outlined below prior to placing your order for a seamless transaction experience:
1. Specify the type of Prefabricated Substation required;
2. Indicate the precise Transformer model and desired capacity;
3. Outline the High and Low Voltage Circuit Main Wiring Scheme for clarity;
4. Detail the Types and Parameters of Electrical Components with any special requirements;
5. Choose a Shell Color to match your aesthetic preference;
6. List the Names, Quantities, and any additional requirements for Spare Parts;

Packing & Delivery

featured products

Company Profile

About us

Golden Triangle Electric Power Technology Co., Ltd. (stock name: Jintai, stock code: 837424) was established in November 2009. The company focuses on the research and development, production, sales and technical services of power products. Its products include, , , , , . The company is a comprehensive enterprise oriented towards production services and integrating EPC construction. Its products are widely used in national power grids, southern power grids, railways, mines, infrastructure, metallurgy, roads and bridges, as well as real estate management systems and other fields.

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The company has passed ISO9001:2015 quality management system certification, ISO14001:2015 environmental management system certification, ISO45001:2008 occupational health and safety management system certification, PCCC energy-saving product certification, national mandatory product "CCC" certification, CQC China quality certification, AAA credit rating certification, etc. The company has been rated as a national high-tech enterprise, a provincial "specialized, refined, distinctive, and innovative" small and medium-sized enterprise, one of the top 100 most growth-potential technology enterprises in the province, a provincial small and medium-sized technology enterprise, and a municipal green factory. The company has a provincial high-tech enterprise R&D center academician workstation and a doctoral innovation workstation, as well as 3 invention patents and 51 utility model patents.

The company's products have been included in the "Energy Saving Popular Project" promotion directory and "Energy Saving Electrical Equipment Recommendation Directory" of the Ministry of Industry and Information Technology, the Ministry of Finance, and the National Development and Reform Commission. It is the first power industry enterprise in Wenzhou to receive direct product sales subsidies from the Ministry of Finance. The company's products have received honors such as "National Industrial Energy-saving Technology Equipment Product", "Provincial Key Industry First Batch Products", and "Provincial Excellent New Industrial Products". The production standards of its main products "SCB13-RL Solid Triangle Core Dry-Type Transformer" and "SBH16-RL Solid Triangle Rolling Iron Core Amorphous Transformer" have been listed as "Zhejiang Manufacturing Quality Standards". The company has led the drafting of 10 standards, including "GB/T32825-2016 Three-phase Coherent Three-dimensional Winding Distribution Transformer National Standard", "NB/T 10483-2020 Three-phase Coherent Amorphous Alloy Three-dimensional Winding Distribution Transformer Standard", and "T/CEElA 251-2016 Photovoltaic Power Generation Composite Transformer Standard", making positive contributions to the energy conservation and emission reduction of China's power industry and the development of green energy technology.

Exhibition

display area

recreational area

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This area is our company's product display zone. After being inspected, each product is neatly arranged and displayed there, allowing customers to have a genuine feel of the products.

This area is our place for relaxation and leisure. We will heat up our meals here at noon and sit and chat here after work.

This area is a display zone. The workers brought each piece here one by one using forklifts and placed them properly.

FAQ

1.Are you manufacturer?

3.Do you have any Certificate?

5.What's the payment terms?

Yes, we are manufacturer. Our factory is in Wenzhou China.

2.How to buy it? What about the delivery?
Please contact me by email or online, let me know your situation, I will give you professional solution. We have shipping agent can choosing the cheapest and fastest delivery. FOB, CIF, C&F or EXW are no problem for us.

Yes. Each of our unit has CCC, ISO9001 certificate. All the electric parts with CE certificate, If you need any other Certificate, we can help you to get it.

4. Can I get guarantee of products?
Yes, every product is 1 year quality warrantee under customer correct using the products.

For small testing orders, we can accept Waster union, T/T and Credit card.
For mass orders, we accept t/t and L/C.

6.What about the production?
Produce time is 4~6weeks.

7.Could you offer some spare parts?

8.What about the maintenance?

Yes, no problem.

All the goods past the test, maintenance is very easy.