Dry transformer is a special type of transformer that can be operated without transformer oil. There are many types of dry transformer, because it is clean, environmental friendly, and can be operated without transformer oil. Therefore, the amount of dry transformer is also relatively large. Common dry type transformer needs a lot of protection, will make its performance more abundant play out. What are the common protection methods of dry transformers?
General dry transformer protection: speed break, over - current, zero - sequence protection.
1, quick break protection
Fast break protection is to overcome the overcurrent protection in the close to the power side of the protection equipment action time is long, the use of progressive setting value, to limit the action planning method to protect the line. There are three protection plans: voltage speed break protection, current flow rate break protection, transformer differential break protection.
2, overcurrent protection
Many electronic devices have a current rating. You are not allowed to exceed the current rating or you will burn the device. So some devices do a current protection module. When the current exceeds the set current, the equipment will automatically power off to protect the equipment.
3, zero sequence protection
Zero sequence protection refers to the occurrence of grounding fault in the large short circuit current grounding system, there is zero sequence current, zero sequence voltage and zero sequence power, the use of these electrical quantities to form the protection of short circuit grounding relay protection equipment.
The above is the common dry transformer of various protection measures and various protection methods, about the protection of the dry transformer to constantly improve the protection of the method, in all aspects to do a good job in the protection of the dry transformer, complete the power and function of the dry transformer to continue to progress!
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