Dry-type transformer is an efficient and safe power equipment suitable for various types of substations and distribution systems. The transformer adopts DYN11 wiring method to reduce high voltage (HV) to the required voltage, and the rated capacity of power conversion is 30kva-2500kva. The components include high-voltage winding, low-voltage winding and shell, which are cast with epoxy resin to ensure sealing and durability. The transformer has grounding and zero protection functions to ensure safe operation under high voltage environment.