Question 1

Are you a manufacturer or a trading company?

Accepted Answer

We are a professional manufacturer with our own production facilities and engineering team.

Question 2

Do you accept factory inspection or audit?

Accepted Answer

Yes, we welcome factory inspections and audits. Customers or third-party inspection agencies are welcome to visit our factory at any time.

Question 3

Can the three phase dry type transformer be customized?

Accepted Answer

Yes. We can customize the transformer according to project requirements, including rated capacity, voltage level, frequency, vector group, winding material, insulation class, protective enclosure, cooling method, temperature control system, dimensions, and installation method.

Question 4

What are the common capacities and voltage ratings?

Accepted Answer

Common capacities include 30kVA, 50kVA, 100kVA, 160kVA, 250kVA, 315kVA, 500kVA, 630kVA, 800kVA, 1000kVA, 1250kVA, 1600kVA, 2000kVA, 2500kVA, and more. Common voltage ratings include 10kV/0.4kV, 11kV/0.4kV, 13.8kV/0.4kV, 20kV/0.4kV, 33kV/0.4kV, etc. Customized voltage designs are available.

Question 5

What is the cooling method of a three phase dry type transformer?

Accepted Answer

The common cooling methods are AN and AF. AN means Air Natural cooling, while AF means Air Forced cooling with cooling fans. For larger capacities or applications requiring improved short-time overload capacity, cooling fans can be equipped.

Question 6

Can the winding material be selected?

Accepted Answer

Yes. Three phase dry type transformers can usually be made with copper windings or aluminum windings. Copper windings offer good conductivity and high mechanical strength, while aluminum windings are more cost-effective. The choice can be determined according to budget, technical requirements, and project operating conditions.

Question 7

What regular maintenance is required for a three phase dry type transformer?

Accepted Answer

Regular maintenance mainly includes checking whether there is dust accumulation, whether ventilation is good, whether terminal connections are loose, whether the temperature control system works properly, whether cooling fans operate normally, and whether there is abnormal noise, odor, or overheating. Dust should be cleaned regularly, and the surrounding environment should be kept dry and well ventilated.

Question 8

What tests are performed before delivery?

Accepted Answer

Before delivery, three phase dry type transformers are usually subject to routine tests, including voltage ratio test, winding resistance test, insulation resistance test, no-load loss test, load loss test, impedance voltage test, power frequency withstand voltage test, induced withstand voltage test, and appearance inspection. Type test reports or third-party inspection reports can also be provided according to project requirements.

Question 9

Can the transformer be equipped with a protective enclosure?

Accepted Answer

Yes. According to the installation environment and safety requirements, three phase dry type transformers can be equipped with enclosures of different protection levels, such as IP20, IP23, IP31, IP40, or customized protection ratings. The enclosure can improve equipment safety and reduce the influence of the external environment on the transformer.

Question 10

What is the function of the temperature control system?

Accepted Answer

The temperature control system is used to monitor the winding temperature of the transformer. It can provide temperature display, over-temperature alarm, over-temperature trip, and automatic start-stop control of cooling fans. It helps improve operating safety and prevents overheating from affecting insulation life.

Question 11

What information is required when ordering a three phase dry type transformer?

Accepted Answer

Customers usually need to provide rated capacity, voltage ratio, phase, frequency, vector group, insulation class, cooling method, winding material, protection rating, installation environment, altitude, temperature rise requirement, loss level, and required accessories. If customers are not sure about the exact parameters, we can provide technical suggestions according to the project application.

Question 12

Can the transformer be used in high-temperature, humid, or high-altitude areas?

Accepted Answer

Yes, but the design should be adjusted according to the site environment. For high-temperature areas, heat dissipation and temperature rise design should be considered. For humid environments, insulation and moisture-proof measures should be strengthened. For high-altitude areas, insulation distance and cooling capacity should be optimized. The specific solution should be confirmed according to project conditions.

Question 13

What standards can the three phase dry type transformer comply with?

Accepted Answer

The three phase dry type transformer can be designed, manufactured, and tested according to IEC, GB, or other relevant standards based on project requirements. Common applicable standards include IEC 60076 series, IEC 60076-11, GB/T 1094.11, GB/T 10228, and other related standards. The specific applicable standard can be confirmed according to the customer's country, power grid requirements, and project technical specifications.

Question 14

What certificates and documents can be provided?

Accepted Answer

We can provide documents such as the nameplate, factory test report, technical data sheet, outline drawing, wiring diagram, user manual, and packing list according to the order and project requirements. If required, CE, ISO, CNAS,type test reports, or third-party inspection reports can also be provided according to the actual product and certification status.

Question 15

Can the loss level of the three phase dry type transformer be customized?

Accepted Answer

Yes. The no-load loss and load loss of the three phase dry type transformer can be designed according to project requirements. Customers can choose standard type, energy-saving type, or higher efficiency designs. A low-loss design helps reduce long-term operating costs and is suitable for shopping malls, factories, data centers, and continuous power distribution systems.

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