The tap changer operating handle shall be equipped with a protective cover. The flange at the handle shall be well sealed with no oil leakage. Locking screws shall securely fasten both the handle and the drive mechanism, and the handle rotation shall be smooth without binding. The position indicator on the handle shall be clear, accurate, and consistent with the tap voltage regulation range of the winding. Limit stops shall be provided at both extreme positions. The insulating cylinder of the t

Analysis and Handling of Fault Tripping in 35kV Substation Operation1. Analysis of Tripping Faults1.1 Line-Related Tripping FaultsIn power systems, the coverage area is extensive. To meet power supply demands, numerous transmission lines must be installed—posing significant management challenges. Especially for special-purpose lines, installations are often located in remote areas such as suburbs to minimize impact on residential life. However, these remote areas have complex environments, makin

Normal operating sound of a transformer. Although a transformer is static equipment, a slight, continuous "humming" sound can be heard during operation. This sound is an inherent characteristic of operating electrical equipment, commonly known as "noise." A uniform and continuous sound is considered normal; an uneven or intermittent noise is abnormal. Tools such as a stethoscope rod can assist in determining whether the transformer's sound is normal. The causes of this noise are as follows: Vibr