Dry type transformer are widely used in
Chemical, oil and gas industry
Environmentally sensitive areas (e.g. water protection areas)
Fire-risk areas (e.g. forests)
Inner-city substations
Indoor and underground substations
Renewable generation (e.g. off-shore wind turbines)
A dry type transformer is a type of transformer which never uses any insulating liquid where its winding or core are immerged in liquid. Rather, the windings and core are kept within a sealed tank that is pressurized with air.
Types of Dry Type Transformers
The dry type transformer is of two types. They are
Cast Resin Dry Type Transformer (CRT)
Vacuum pressure Impregnated Transformer (VPI)
What are the main advantages of a dry type transformer?
Self-extinguishing, low fire hazard
a dry type transformer comes with an eco-friendly material on its insulation. So, it comfortably winds in a self-extinguishing manner, is flame retardant, and of course easy to maintain. With it, you won't have to invest in a fire extinguisher. Plus, even under the influence of arcing, it doesn't produce toxic gases.
Zero Oil Usage
as mentioned earlier, the dry transformer doesn't need any liquid to cool. It only requires air to remain cool. So, you won't have to incur extra expenses to get oil, or any other liquid, plus the maintenance costs attached to them. It's safe to say that this is an almost maintenance free transformer, so you can stay worry-free.
Eco-friendly and safe
since dry transformers don't use oil or liquids for that matter, you won't have to deal with oil leaks. Or any other form of environmental pollutants. Plus, they are self-extinguishing meaning they rarely explode. Also, the dry type transformers are widely known to withstand unexpected weather changes, making them suitable for heavily polluted and condensed environments.
Low cost installation and lower load losses
due to their low risk nature, there are barely any restrictions when installing the dry type transformers. You also won't have to deal with other environmental precautions such as groundwater protection. Also, these transformers can serve you for over 20 years, with low chances of failure.
Low Maintenance
we cannot insist on this enough. The dry type transformers are extremely low maintenance. Like you barely have to even maintain them. As long as they have air to cool, you won't have to deal with built-up dirt. Also, you will never have to deal with liquid testing. However, a routine expert inspection is recommended, and that shouldn't be too hard.
Sustainable
when you use a dry transformer, you are playing a key role in ensuring we save our earthly resources. With it comes low electricity usage, 90% recyclable materials, and a reliable service of 20+ years.
Product Description:
JSZW3-3/6/10 type voltage transformer is casting, dry type, three-phase indoor type products, applicable to the rated frequency of 50Hz or 60Hz, suitable for 6kV and 10kV rated voltage in the power system, used for electrical energy measurement, voltage monitoring and relay protection.
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Structure Introduction:
This series transformer is epoxy resin vacuum casting, semi-closed structure. The core is stacked by high quality silicon steel sheet, the transformer is three casting body, set on three-phase five-pillar core, all the windings are fully cast in epoxy resin, which has excellent insulating property, impact resistance and mechanical stress, and it can protect the windings from moisture and dampness, and the terminal marking of the dampness is clearly marked on the casting body. Compact structure, easy to use
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Technical parameters:
Standard: GB20840.3-2013 voltage transformer.
Product surface creepage in line with the pollution of the second level.
Rated voltage ratio (KV) and accuracy level and output capacity and other technical parameters are shown in the table below:
| Rated Voltage Ratio (KV) | Accuracy Level and Output Capability | Limit Output (VA) | Insulation Level (kV) |
|----------------|-------------------|-------------|-------------|
| 3 / V3/0.1/3 | 45 | 90 | 600 |
| 6 / V3/0.1/V3 | 45 | 30 | 600 |
| 10 / V3/0.1/V3 | 60 | 150 | 1000 |
The above data is extracted from
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Supplier Information:
Supplier offers 10kV to 110kV all kinds of indoor and outdoor current and voltage transformers; combination transformers, power metering boxes and other products. Supplier is located in the electrical capital of China - China Yueqing City, Liu Shi Town, Qili Gang, is a professional independent research and development, design, production, sales of a variety of advanced current, voltage, combined and primary and secondary depth of integration of transformers of high-tech enterprises
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Qualification Requirements:
The supplier shall be a legal person or other organization registered according to law in the People's Republic of China, with business license/institution legal person certificate operation/business scope covering the products being verified. Need to provide test reports, test reports issued by the state-authorized professional testing organizations or international professional authority, and the certificate schedule testing scope must cover the verified product
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The above information provides detailed description, structural characteristics, technical parameters and supplier information of 10kV Three-phase Combined Voltage Transformer JSZW3-3/6/10 for your reference.
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