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Advantages and disadvantages of dry-type transformers and oil-immersed transformers and their differences

| 发布时间:2019-10-11 | 浏览数:载入中... Source: http://shihaojs.com/ | Release time: 2019-10-11 | Views: Loading ...


Where can I find a transformer ? Of course, Shanghai Huanniu Electrical Equipment Manufacturing Co., Ltd. As a professional transformer production and sales manufacturer, this article will introduce the advantages and disadvantages of dry-type transformers and oil-immersed transformers and their differences.

Dry prices become more expensive than oil.

In terms of capacity, oil with large capacity becomes more than dry.

It is necessary to use dry transformers in complex buildings (basements, floors, roofs, etc.) and in densely populated areas. The oil transformer is used in an independent transformer substation.

Box transformers generally use box transformers. Temporary electricity for outdoor use generally uses oil transformers.

Choose dry and oil changes according to the space during construction. Choose oil changes when the space is large, and dry changes when the space is crowded.

The regional climate is relatively humid and hot, and it is easy to use oil to change. If dry transformer is used, it must be equipped with forced air cooling equipment.

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1.Appearance

Different packaging forms, dry-type transformers can directly see the iron core and coils, while oil-type transformers can only see the shell of the transformer;

2, lead form is different

Most dry-type transformers use silicone rubber sleeves, while oil-type transformers mostly use porcelain sleeves;

3.Capacity and voltage are different

Dry-type transformers are generally suitable for power distribution. The capacity is mostly below 1600KVA, the voltage is below 10KV, and some can achieve 35KV voltage level; while the oil-type transformer can achieve the full capacity from small to large, and the voltage level also achieves the voltage. ; The UHV 1000KV test circuit under construction in China must use oil transformers.

4, insulation and heat dissipation are not the same

Dry-type transformers are generally insulated with resin, relying on natural air cooling and large-capacity cooling by fans, while oil-type transformers are insulated by insulating oil, and the circulation of the insulating oil inside the transformer transfers the tropical heat generated by the coil to the transformer's radiator (sheet). For cooling.

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5. Applicable places

Dry-type transformers are mostly used in places that require "fire and explosion-proof", and are generally easy to use on large buildings and high-rise buildings; while oil-type transformers may have oil spraying or leaking after an accident, causing fires, most of them are used outdoors. And there are places for digging "accident oil pools".

6. Different bearing capacity

Generally dry-type transformers should run at rated capacity, while oil-type transformers have better overload capacity.

7, the cost is different

For transformers of the same capacity, the purchase price of dry-type transformers is much higher than the price of oil-type transformers.

Models of dry-type transformers generally start with SC (epoxy resin encapsulation type), SCR (non-epoxy resin cast solid insulation encapsulation type), and SG (open type)


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