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Take you to know the safe operation of dry type transformer

Release time:2020-11-04 09:27:14 Popularity: Source:未知

       The safe operation and service life of dry-type transformer depend on the safety and reliability of winding insulation of dry-type transformer. The winding temperature exceeds the insulation endurance, and the insulation damage caused by temperature is one of the main reasons why dry-type transformer can not operate normally. Therefore, the working temperature monitoring and alarm control of dry-type transformer is very important.
 


        Because the structure of dry-type transformer is from inside and outside, it is iron core, low-voltage winding and high-voltage winding. The heat source is the iron core and the low-voltage winding wire, and the heat of the high-voltage winding wire on the external surface is small because of the small current. Therefore, the cooling effect of dry-type transformer and air conditioner is not good when using ordinary axial-flow fan.

 
 
 
In the manufacture of dry-type transformer, a special cooling pipe is left. Only by using special temperature control device can dry-type transformer achieve the desired effect.
 
 
 
In order to meet the requirements of unattended substation, it is suggested to install air-cooled temperature control system on the existing transformer substation to improve the ventilation of switch cabinet. If the temperature is too high, the air exchange and heat dissipation device can be started automatically.
 
 
 
 
 
The temperature signal is measured by a Pt 100 thermistor embedded in the hot part of the low-voltage coil. When the load of dry-type transformer increases and the operating temperature rises, the winding temperature reaches a certain value (this value can be adjusted, and the F-class dry-type insulation tr
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