How to protect cast resin transformer？
Dry-type cast resin transformer is a special type of transformer that can be operated without transformer oil. There are many types of dry-type transformers, because it is clean, environmentally friendly, and can be operated without transformer oil. Therefore, the use of dry-type cast resin transformers The amount is also relatively large. Common dry-type transformers require extensive protection, so that their performance can be more fully exerted. What are the common protection methods for dry-type transformers?
General dry-type cast resin transformer protection includes: quick-break, over-current, zero-sequence and other protections.
1. Quick break protection
The quick-break protection is to overcome the long action time limit of the protection equipment near the power supply end of the overcurrent protection. It adopts the method of increasing the setting value and limiting the action plan to protect the line. There are three types of protection plans: voltage quick-break protection, current quick-break protection, and transformer differential quick-break protection.
2. Overcurrent protection
Many electronic devices have a rated current, and it is not allowed to exceed the rated current, otherwise the device will be burned out. Therefore, some devices have made 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 means that after a grounding fault occurs in a large short-circuit current grounding system, there will be zero-sequence current, zero-sequence voltage and zero-sequence power. These electrical quantities are used to form a general term for relay protection equipment that protects grounding short-circuits.
The above are various protection measures and various protection methods of common dry-type transformers. Regarding the protection of dry-type transformers, we should continuously improve the protection methods, and do a good job in the protection of dry-type transformers in all aspects. The power and function of the type transformer continue to improve.
