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Jiangsu Hengte Group Voltte Electric Co., Ltd.

福建快3Tel: 0513-88782289

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福建快3Contact: Mr. Gu

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福建快3Address: Haian County,Jiangsu Province,Kaiyuan Road 99-2 No.


Experimental noise voltage dry-type transformers big reason

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Experimental noise voltage dry-type transformers big reason

Date:2014-10-24 00:00 Sourse:http://csyma.com Hits:

Pressure experiments to do, because the reason there will be three voices electrical spacing

福建快3"Crack crack": the sound of air ionization

"Zi, zi": the sound of the air flow injection

"Pop": loud and crisp, along with sparks, is insulated (or air) is the breakdown of sound

福建快3Normal air discharge is divided into three phases, the first ionization, the electric field in the big points, will enter the flow injection stage, the bigger will be the breakdown of air.

福建快3If just like "crackling" sound fried beans, and can persist for one minute without breakdown, then the criterion is fit GB request.

If presented "zi zi" voice, but also insisted a minute without breakdown, it is actually fit GB request, but the risk presented streamer long-term operation of large transformers.

The main reason for the large voltage noise is the main Kongdao (high voltage winding and low voltage coil) of air space is not enough.

E = U / DE field, U voltage spacing D between the electrodes, when D is small, E is large, the air pressure in the specification, specification withstand field strength caused by humidity of 0.7KV / mm. When the electric field is greater than this value, it will easily ionized molecules. But the air is not just a breakdown, it will not conduct electricity.

Incidentally, insulation transformer primary Kongdao Do not just look at the air, due to the pressure down there are inner and outer coil insulation, the calculation should be based on a composite insulation thinking


Related Tags:Dry-typetransformermanufacturers

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