Name: Dry Type Transformer - China Dry Type Transformer Manufacturers Suppliers Factory - Yawei Transformer
Brand: Yawei
SKU: 227617367

Description

Technical Parameters

Jiangsu Yawei Transformer Co.,Ltd. is one of the leading manufacturers and suppliers of dry type transformer in China. Please feel free to buy high quality dry type transformer from our factory. Customized orders are welcome.

Dry-type transformers are a variety of electrical transformers where the core and windings are not immersed in an insulating liquid. Instead, they rely on air or other solid material for insulation and cooling. These transformers are commonly used in various applications due to their safety, efficiency, and environmental friendliness.

Cooling Method:

Use air or gas (like SF6) for cooling.

Can include fans to enhance air circulation for improved cooling efficiency.

Insulation:

Typically use high-temperature insulation materials like resin, varnish, or special insulating papers.

The windings might be vacuum pressure impregnated (VPI) or encapsulated in resin.

Temperature control system

Built-in PT100 probes in 3 phase windings to detect the real-time temperature of windings and cycle display them in the digital screen.

Open circuit alarm and fault self-check alarm display and signal output.

3 stages automatically actions while the temperature reached to the set value, 1st stage the cooling fans start automatically, 2nd stage high temperature alarm,3rd stage over temperature trip.

Fans manual/auto control switch, timing start/stop, history data output.

4-20mA current output

RS485 Modbus communication protocol

Environment temperature measurement

Core temperature measurement

Applications

Indoor Installations: Preferred where fire safety is a major concern, such as in buildings and populated areas.

Industrial Environments: Used in industries where avoiding oil contamination is crucial.

Renewable Energy Systems: Common in wind and solar power plants due to their environmental safety and robustness.

Commercial Buildings: Offices, shopping malls, airports, and hospitals often use dry-type transformers due to their safety and low maintenance needs.

Types of Dry-Type Transformers

Cast Resin Transformers:

Have windings encapsulated in epoxy resin.

Offer good protection against dust and moisture.

VPI Transformers:

Windings are vacuum pressure impregnated with a high-temperature varnish.

Provide a good balance between performance, cost, and protection.

Advantages and Disadvantages

Advantages: Safer in terms of fire hazards, environmentally friendly, lower maintenance requirements, and well-suited for indoor applications.

Disadvantages: Larger and heavier than equivalent oil-filled transformers, potentially noisier, and generally more expensive.

Dry-type transformers are an effective solution in many scenarios where safety, environmental concerns, and space constraints (as in urban settings) are paramount. However, the choice between dry-type and oil-filled transformers often depends on the specific requirements of the application, including power capacity, installation environment, and budget considerations.

Quality standards of product

product-1000-250

1.Quality management system GB/T 19001-2016 ISO 9001: 2015

The operation of the whole YAWEI system is strictly controlled and managed. This ensures the quality of products and material in all stages, from receiving customer requests to design, materials, production, installation, testing, packaging, delivery, after-sales, all of which operate under strict and logically linked processes.

2.Certificate of compliance of UL and CUL

YaWei pad mounted transformer have been evaluated by UL in accordance with the U.S and Canada Standard(s). Our transformer certified by UL based on Canadian standards (CSA standards).

3.Accreditation certificate CE

Standard: EN 60076-1:2011.EN 60076-2:2011EN 60076-14:2013 confirms that YAWEI technical quality meets the requirements of all specific international standards for testing and calibration laboratories. All YAWEI products are fully tested in a qualified testing room before leaving the factory, ensuring stable quality and providing absolute peace of mind for customers.

Characteristics of Yawei power transformer

Yawei dry type epoxy-resin

product-1000-550

Yawei dry type horizontal winding line

product-1000-500

Yawei Dry type transformer testing center

product-1000-550

Yawei Dry type transformer installation line

product-1000-550

Yawei Dry type transformer cabinet workshop

product-1000-500

Yawei Dry type transformer ready machine

product-1000-600

Transformer General Technical Parameters

Rated Capacity (kva)	HV (kV)	Tapping Ranges	LV (kV)	Vector-group	No-load Loss	75 ℃ Load Loss	No-load Loss	Short -Circuit Impendance
30	6 6.3 6.6 10 10.5 11	±5% ±2X2.5%	0.4	Dyn11 Yyno	190	710	2.4	4
50					270	1000	2.4
80					370	1380	1.8
100					400	1570	1.8
125					470	1850	1.6
160					540	2130	1.6
200					620	2530	1.4
250					720	2760	1.4
315					880	3470	1.2
400					980	2990	1.2
500					1160	4880	1.2
630					1340	5880	1.0
630					1300	5960	1.0	6
800					1520	6960	1.0
1000					1770	8130	1.0
1250					2090	9690	1.0
1600					2450	11730	1.0
2000					3050	14450	0.8
2500					3600	17170	0.8
1600					2450	12960	1.0	8
2000					3050	15960	0.8
2500					3600	18890	0.8

Rated Capacity (kva)	HV(kV)	Tapping Ranges	LV (kV)	Vector-group	No-load Loss	75 ℃ Load Loss	No-load Loss	Short -Circuit Impendance
50	20 22 24 or others	±5% ±2x2.5%	0.4 or others	Dyn11 Yyno or others	380	1300	2.4	6
100					600	2100	2.2
160					750	2600	1.8
200					820	3100	1.8
250					940	3600	1.6
315					1080	4300	1.6
400					1280	5100	1.4
500					1500	6100	1.4
630					1700	7200	1.2
800					1950	8700	1.2
1000					2300	10300	1.0
1250					2650	12150	1.0
1600					3100	14600	0.8	8
2000					3600	17250	0.8
2500					4300	20400	0.8
2000					3600	18800	0.8
2500					4300	22400	0.8

Rated Capacity (kva)	HV/LV (kV)	Tapping Ranges	Vector Group	No-load Loss	B 100℃ Load Loss (w)	P 120℃ Load Loss (w)	H 145℃ Load Loss (w)	No-load Current (%)	Short -cirsuit Impedance
30	6/0.4 6.3/0.4 6.6/0.4 10/0.4 10.5/0.4 11/0.4	±5% ±2x2.5%	Dyn11 Yyn0	135	605	640	685		4.0
50				195	845	900	965
80				265	1160	1240	1330
100				290	1330	1415	1520
125				340	1565	1665	1780
160				385	1800	1915	2050
200				445	2135	2275	2440
250				515	2330	2485	2665
315				635	2945	3125	3355
400				705	3375	3591	3850
500				835	4130	4390	4705
630				965	4975	5290	5660
630				935	5050	5365	5769		6.0
800				1095	5895	6265	6715
1000				1275	6885	7315	7885
1250				1505	8190	8720	9335
1600				1765	9945	10555	11320
2000				2195	12240	13005	14005
2500				2590	14535	15455	16605
1600				1765	11050	11660	12510		8.0
2000				2195	13520	14360	15400
2500				2950	15980	17000	18260

Transformer Testing

20MVA T3-Ultra High Voltage Testing Equipment

Routine test
1	Winding resistance test
2	Voltage ratio test and vector group label verification
3	Short circuit impedance and load loss test
4	Test of no-load loss and no-load current
5	Insulation resistance test
6	External voltage withstand test
7	Induction voltage withstand test
8	Tap changer test

Transformer Packing and delivery

Yawei ensure that each one of our delivered units has undergone rigorous full acceptance testing. We provide one-package service from consulting, quoting, manufacturing, installation, commissioning, training to after sale services, our products are now operating in more than 50 countries in the world. We aim to be your most reliable supplier as well as your best partner in business!

dry type transformer loading dry transformer with cabinet

Custom your transformer

Contact us for specific power solution!

how to cusstom a power transformer

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Main Products Of YAWEI

Pad Mounted Transformer

Substation Transformer(Skid Mounted Transformer)

Pole Mounted Transformer

Power Transformer

Furnace Transformer

Compact transformer

Distribution Transformer

Dry Transformer

FAQ

Q: 1.Why would you use a dry transformer?

A: A dry transformer is used in various applications primarily for safety, efficiency, and environmental reasons. Safety: Dry transformers are safer compared to oil-filled transformers as they are less flammable. This is particularly important in environments where fire safety is a major concern, such as in buildings, underground tunnels, and ships. No Risk of Oil Leakage: Unlike oil transformers, dry transformers don't contain oil, which eliminates the risk of oil leakage. This makes them environmentally friendly and suitable for sensitive areas where contamination from oil leaks could be a serious issue. Low Maintenance: Dry transformers require less maintenance compared to oil-filled transformers. They don't need regular oil checks and replacements, which reduces maintenance costs and downtime. High Reliability: Dry transformers are often more reliable in harsh conditions. They are better suited for areas with high humidity or extreme temperatures. Installation Flexibility: Due to the absence of oil, dry transformers can be installed indoors without the need for additional containment measures like oil catch pits. This flexibility can be a significant advantage in urban or space-constrained environments. Immediate Operation: Dry transformers can be put into operation immediately after installation without the need for a settling period, unlike oil-filled transformers which may require time for the oil to settle and de-aerate. Environmental Considerations: Being free from oil, dry transformers are considered more environmentally friendly. They don't pose a risk of contaminating the soil or groundwater. Suitability for Certain Locations: Dry transformers are often the preferred choice in places like airports, high-rise buildings, underground facilities, and hospitals, where safety and space constraints are paramount. In summary, dry transformers are chosen for their safety, low environmental impact, reduced maintenance needs, and flexibility in installation, especially in areas where these factors are critical.

Q: 2.What are the disadvantages of dry type transformer?

A: Dry-type transformers, while advantageous in many aspects, also have some disadvantages compared to their oil-filled counterparts: Higher Operating Temperature: Dry-type transformers generally operate at higher temperatures. This is because the cooling medium in oil-filled transformers (the oil itself) is more efficient at dissipating heat compared to the air or gas used in dry-type transformers. Limited Power Capacity: Generally, dry-type transformers are available in lower power capacities compared to oil-filled transformers. This limitation is primarily due to their less efficient cooling methods, making them less suitable for very high power applications. Shorter Lifespan: The higher operating temperatures can lead to accelerated aging of insulation materials in dry-type transformers. This often results in a shorter lifespan compared to oil-filled transformers under the same operating conditions. Greater Noise Levels: Dry-type transformers typically produce more noise during operation than oil-filled transformers. This is because the oil in oil-filled transformers acts as a sound dampener. Higher Initial Cost: The manufacturing process and materials for dry-type transformers are often more expensive, leading to a higher initial purchase cost compared to oil-filled transformers. Vulnerability to Contaminants: While dry-type transformers are less prone to fire and oil leaks, they are more susceptible to contamination by dust and other airborne particles. These contaminants can affect the performance and longevity of the transformer. Size and Weight: For a given capacity, dry-type transformers tend to be larger and heavier than oil-filled transformers. This can make transportation, installation, and space allocation more challenging. Cooling Requirements: Efficient cooling is crucial for dry-type transformers, especially in confined spaces. Additional ventilation or air conditioning might be needed, which can add to the operational costs. Despite these drawbacks, the choice between dry-type and oil-filled transformers often depends on specific application requirements, environmental considerations, and safety concerns. For many scenarios, particularly where fire safety and environmental factors are critical, the advantages of dry-type transformers outweigh their disadvantages.

Q: 3.Which is better dry or oil cooled transformer?

A: Determining whether a dry or oil-cooled transformer is "better" depends heavily on the specific requirements of the application, the operating environment, and the priorities of the user. Both types have distinct advantages and disadvantages, making them suitable for different scenarios. Here's a comparison to help guide the decision: Dry-Type Transformers Advantages: Safer in terms of fire hazards as they do not contain flammable liquid. No risk of oil leakage, making them environmentally friendly. Suitable for indoor installations and in environmentally sensitive areas. Require less maintenance than oil-cooled transformers. Can be used in areas with higher humidity or where oil contamination would be problematic. Disadvantages: Typically have higher operating temperatures. Limited in size and power capacity compared to oil-cooled transformers. Generally more expensive upfront. Shorter lifespan due to the heat stress on insulation materials. Larger and heavier for the same power rating. More susceptible to contamination from dust and other airborne particles. Oil-Cooled Transformers Advantages: Higher efficiency in cooling, allowing them to operate at a lower temperature. Suitable for higher power applications and can be built for very high voltage and power ratings. Tend to have a longer lifespan under optimal conditions. Usually cost less upfront compared to dry-type transformers. Smaller and lighter for the same power rating. Disadvantages: Pose a fire hazard due to the flammable oil, requiring careful handling and safety measures. Risk of oil leakage, which can be an environmental concern. Require regular maintenance, including oil checks and replacements. Not suitable for certain indoor or environmentally sensitive installations without additional safety measures. Conclusion Choose Dry-Type Transformers when safety, environmental concerns, and low maintenance are top priorities, especially in indoor or confined spaces where fire safety and leakage are major concerns. Choose Oil-Cooled Transformers for applications requiring higher power capacity, more efficient cooling, and cost-effectiveness, especially in outdoor or industrial settings where size and fire risk can be managed effectively. Ultimately, the choice between dry and oil-cooled transformers should be based on a thorough assessment of the specific needs of the project, including safety requirements, environmental conditions, maintenance capabilities, and budget considerations.

Q: 4.What are the advantages of dry type transformer over oil type?

A: Dry-type transformers offer several advantages over oil-type transformers, making them a preferred choice in certain applications. Here are the key advantages: Safety: Dry-type transformers are generally safer than oil-type transformers because they do not contain flammable oil. This reduces the risk of fire and explosions, which is particularly important in densely populated or environmentally sensitive areas. No Risk of Oil Leakage: Since dry-type transformers do not use oil as a cooling medium, there's no risk of oil leakage. This eliminates concerns about soil and water contamination, making them more environmentally friendly and suitable for indoor or sensitive locations. Lower Maintenance Requirements: Dry-type transformers require less maintenance compared to oil-type transformers. They don't need oil monitoring, oil replacement, or containment structures for oil leaks, which reduces ongoing maintenance costs and efforts. Immediate Operation and Easy Installation: Dry-type transformers can be installed and operational more quickly. They don't require a settling period for the cooling medium, unlike oil transformers, which may need time for the oil to settle and de-aerate. This makes them easier and faster to install. Reduced Environmental Concerns: Apart from eliminating the risk of oil leaks, dry-type transformers are also free from issues related to oil disposal or the need for special handling associated with oil. Better Performance in Certain Environments: Dry-type transformers are more suitable for places with high humidity or where there are fluctuations in temperature. They are less prone to performance degradation in such conditions compared to oil-filled transformers. Location Flexibility: Without the need for oil containment or specific cooling arrangements, dry-type transformers can be installed in a wider variety of locations, including indoors, underground, or in areas with space constraints. Good for Urban and Commercial Settings: Their safety, low maintenance, and environmental features make dry-type transformers ideal for urban, commercial, and public buildings like hospitals, schools, shopping malls, and residential complexes. In summary, the advantages of dry-type transformers over oil-type transformers center around safety, environmental friendliness, lower maintenance requirements, and greater flexibility in installation locations. These benefits make them particularly suitable for applications where these factors are of high importance.

Q: 5.How does a dry transformer work?

A: A dry-type transformer operates on the same basic principle as other transformers, which is electromagnetic induction, but it differs in its cooling method. Here's a breakdown of how a dry transformer works: Basic Principle of Operation Electromagnetic Induction: At its core, a transformer works on the principle of electromagnetic induction. When alternating current (AC) flows through the primary winding (coil) of the transformer, it creates a varying magnetic field. Magnetic Flux and Induction: This magnetic field induces a magnetic flux, which passes through the transformer's core and links to the secondary winding. Voltage Induction in Secondary Winding: The varying magnetic flux induces a voltage in the secondary winding. The amount of voltage induced depends on the ratio of turns (or coils) between the primary and secondary windings. Dry-Type Transformer Specifics Construction: Dry-type transformers have windings encased in sealed, pressurized tanks and are air-cooled, or more accurately, cooled by the natural circulation of air around them. Some designs may include fans to enhance air circulation for cooling (forced air cooling). Insulation: Instead of being immersed in cooling and insulating oil, the windings in dry-type transformers are insulated with materials like resin. This provides the necessary electrical insulation, mechanical strength, and protection from the environment. Cooling Mechanism: In a dry-type transformer, heat dissipation occurs through the surface of the unit. The cooling process is either natural air convection or forced air (using fans). The absence of oil makes the heat dissipation process slightly less efficient than in oil-filled transformers, but it eliminates risks associated with oil. Environmental Suitability: The construction and cooling method make dry-type transformers suitable for use in places where oil leaks could be problematic, such as indoors or in environmentally sensitive areas. Applications Dry-type transformers are commonly used in applications where safety and environmental concerns are paramount, such as in residential areas, commercial buildings, schools, hospitals, underground tunnels, and ships. In summary, a dry-type transformer functions on the principle of electromagnetic induction like any transformer but differs in its construction and cooling method. It uses air for cooling and solid insulation materials, making it suitable for applications where safety and environmental factors are critical.

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