Explanation on the correlation of dry type transformer
Dry-type transformers run without oil, so there are no fire, pollution and other problems. They are much safer than oil-type transformers. Now the new series of dry transformers have new improvements in loss and noise. Shanghai transformer detailed explanation.
Let's take a look at the use of dry transformer related knowledge
Let's first take a look at how to use the dry type transformer protection and protection mode
The dry type transformer can choose different enclosures according to the use environment characteristics and protection requirements. Generally, IP23 protective shell is selected to prevent some solid foreign bodies and small animals such as mice, snakes, cats and birds from entering, causing faults to the machine and providing safety barrier for live parts. If you want to install the transformer outdoors
, you can choose the IP23 protective shell, which can prevent water droplets within 60° Angle from the vertical line.
The safe operation and service life of dry-type transformers depend largely on the safety and reliability of the winding insulation. The insulation damage caused by the winding temperature exceeding the insulation tolerance temperature is one of the main reasons that the transformer cannot work normally. Therefore, it is very important to monitor and control the operating temperature of the transformer.
Knowledge of overload capacity of dry transformers
The overload capacity of dry-type transformer is related to the ambient temperature, the load condition before overload (initial load), the insulation and heat dissipation condition of transformer and the heating time constant, etc. If necessary, the over-load curve of dry-type transformer can be obtained from the production plant.
Knowledge of cooling methods for dry transformers
The cooling methods of dry-type transformer are divided into natural air cooling (AN) and forced air cooling (AF). When the transformer is naturally air-cooled, it can run continuously for a long time under rated capacity. When forced air cooling, the output capacity of transformer can be increased by 50%. Suitable for intermittent overload operation, or emergency overload operation; Due to the large increase of load loss and impedance voltage, it is in a non-economic operation state, so it should not be in a long time continuous overload operation.
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