This product complies with the national standards GB1094 "Power Transformers" and GB/T6451 "Technical Parameters and Requirements for Three phase Oil immersed Power Transformers". On load voltage regulation range: 10 ± 4 × 2.5% kV, 35 ± 3 × 2.5% kV, off excitation voltage regulation range: 10 ± 2 × 2.5% kV, 35 ± 2 × 2.5% kV. The voltage can be manually, electrically or automatically adjusted within the voltage regulation range on the primary side with the help of on load and off excitation voltage regulation switches to ensure the stability of the output voltage. The device body adopts three positioning points of upper, middle, and lower, as well as special anti loosening and shock-absorbing measures, which eliminates the need for core inspection before installation and has shock-absorbing function. The fuel tank is made of high-quality steel plate with high mechanical strength. The rubber strips and pads are made of the latest high-quality acrylic products, which will not age after long-term operation and effectively prevent transformer oil leakage.