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Advantages of dry high voltage test transformer

time:2020/9/4   source:华天电力  reading:244 time

If power workers want to boost the voltage, they need to use test transformers. Generally speaking, the current test transformers are divided into dry type, rechargeable type and oil-immersed type. These three mainstream test transformers have their own advantages and disadvantages. Generally speaking, if the test site, if the requirements for environmental sanitation are relatively high, and the movement is relatively small, it is more suitable for dry-type test transformers.


Hipot Test Set (Dry Type).png


Dry-type test transformers (also known as high-voltage dry-type test transformers) are suitable for power systems and other high-voltage electrical equipment, electrical components, and insulation materials to conduct dielectric strength tests under power frequency DC and high voltage. It is essential and important in high-voltage tests. equipment.


Compared with the oil-immersed test transformer technology of the same capacity and voltage, the dry-type test transformer weakens the magnetic flux leakage, improves the strength and moisture resistance of the system insulation material, and has its own light weight, small size, relatively stable performance, and use It can be carried more conveniently, without oil leakage and other advantages.


The input voltage of the dry-type test transformer is 200V. The principle of electromagnetic induction based on the input voltage needs to be changed. The output high voltage can be continuously adjusted to the nominal value obtained from zero volts. When the DC voltage and leakage current are tested, as long as the voltage is silicon Laminated, twisted at high voltage output, the input voltage can be changed in order to obtain different values of output DC high voltage.


Compared with oil-immersed test transformers and gas-filled test transformers, dry-type test transformers are cleaner and more hygienic, no oil will appear, and the price is cheaper, but because of the relatively large weight, it is suitable for use in places with less movement


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