Technical requirements for dry-type transformers

(1) Dry-type transformer body: 

The high-voltage winding is made of copper wire and the low-voltage winding is made of copper foil.The coil is made of

 imported epoxy resin glass fiber in full vacuum, with strong rigidity and mechanical strength, and good short-circuit resistance.  The ampere-turns of 

the high-voltage and low-voltage coils should be balanced.The epoxy resin glass fiber mixture has the same thermal expansion coefficient as copper conductors, 

ensuring that the coil does not crack.It has strong heat dissipation performance.It is equipped with a temperature display control system that automatically 

displays the temperature of the transformer's three-phase winding. When the temperature limit is reached, the thermostat can automatically send a signal 

to control the fan start and stop, overtemperature alarm and action protection, and provide two passive contacts for automatically opening the substation 

exhaust fan.

The iron core and all exposed metal parts should be subjected to rust prevention treatment.The nameplate is made of stainless steel, and the important data

related to the transformer are marked on the nameplate according to national standards.The assembled shell is assembled on site, and the shell material is 

made of stainless steel plate.It has a communication 485 interface, which can relay the operating status of the transformer.

(2) The dry-type transformer can operate with 100% load under the condition that the fan is not running without overheating;it is allowed to operate with 

50% overload under the condition that the fan is running normally, without overheating, alarming, or tripping.

(3) Dry-type transformer no-load loss: 

The no-load loss is manufactured according to the national standard with negative error, not positive error, and must comply with the latest implementation 

standards of Shandong Electric Power Company.

(4) Noise index: 

The 2000KVA transformer is lower than 52ab when the normal operation fan is not running.

(5) Creepage distance: 

Organic material not less than 20mmKV, porcelain not less than 18mm/KVo20, high-voltage side phase-to-ground and phase-to-phase net air safety 

clearance (live parts) 2125mmo.

(6) The high-voltage incoming line is a cable, which meets the needs of upper or lower incoming lines;the low-voltage outgoing line is a bus duct, which 

is an upper outgoing line.

(7) The cabinet should be equipped with access doors and inspection windows at the front and rear to facilitate inspection of the joints in various parts.

(8) Equipped with temperature measurement device and temperature control box;the micro switch in the control box adopts the manufacturer's accurate 

24V power supply.  All components should use the reinforced insulation type products certified by the "Two Departments".

(9) The terminal (10cm) of the hanging ground wire shall be left at a suitable position, and the rest shall be painted with corresponding phase color paint.

(10) Under normal working conditions and load conditions, the transformer has a service life of 230 years.

(11) Other contents not mentioned shall be implemented according to GB6450-86.

Company Advantages


We can provide you with power transformer manufacturing equipment and technical services for you to create a strong competitive transformer factory


The company is a key enterprise in the field of electric power electrical equipment manufacturing in China, and a core professional equipment supplier of state grid, China southern power grid and many listed companies in the electric power industry.


The brand name of CANWIN has been registered in China, European Union, Africa, South America, United States, Russia, India, Southeast Asia and other 118 countries.

Certifications and Patents

Frequently Asked Questions about coil cut to length line


Do you have any agent in our country?        


CANWIN transform and upgrade traditional industries as an opportunity to deepen the " one belt and one road" strategic layout, deepen cooperation with foreign markets. in the form of cooperation and mutual benefit, set up the transformer manufacturing center and core processing base in the Middle East, India. Dubai. Vietnam. Thailand. etc.In the future, CANWIN will move towards the direction of intelligent equipment leader, making China a global reputation!


Which certificate do you have for your equipment?        


We have owned 56 patents in fields of the international invention. ISO9001 / SO14001/ STL / ASTA / KEMA


How many years have your company made this kind of equipment?        


We have 20 years of marketing experience and a 200,000 square foot modern manufacturing center.


Can you send your staff to install the equipment for us?        


After - sales free to provide engineers on-site installation and debugging and professional technical training.Answer your technical or technical questions by phone or in writing.


What can we do for you ?        


We can provide you with power transformer manufacturing equipment and technical services for you to create a strong competitive transformer factory. We can provide you with special transformer OEMODM services. Even if you do not have the ability to produce, you can also go to pick up your order. We can provide you with all the high quality raw materials you need for your transformer plant production. Of course, the price must be very attractive!

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They are all manufactured according to the strictest international standards. Our products have received favor from both domestic and foreign markets.


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