Electrical engineering learning reference chart

1.Common Faults and Diagnostic Measures1.1 Transformer Oil Leakage1.1.1 Oil Leakage from Tank Weld SeamsFor oil leakage at flat joints, direct welding is applicable. For leakage at corners or joints reinforced with stiffeners, the exact leakage point is often difficult to locate, and re-leakage may occur after welding due to internal stress. For such cases, repair welding with an added iron plate is recommended: for two-surface joints, the iron plate can be cut into a spindle shape for welding;

Currently, the company operates two electric arc furnace (EAF) transformers. The secondary voltage ranges from 121 V to 260 V, with a rated current of 504 A / 12,213 A. The high-voltage side has a total of eight tap positions, utilizing motor-driven off-circuit voltage regulation. The equipment is equipped with a reactor of corresponding capacity, connected in series to designated taps on the high-voltage side. These transformers have been in operation for over 20 years. Throughout this period,

1 Failure Mechanisms of Power CapacitorsA power capacitor primarily consists of a housing, capacitor core, insulating medium, and terminal structure. The housing is typically made of thin steel or stainless steel, with bushings welded to the cover. The capacitor core is wound from polypropylene film and aluminum foil (electrodes), and the interior of the housing is filled with liquid dielectric for insulation and heat dissipation.As a fully sealed device, common failure types of power capacitors

1 Overview of Reactive Power Compensation Technology1.1 Role of Reactive Power Compensation TechnologyReactive power compensation technology is one of the widely used techniques in power systems and electrical grids. It is primarily employed to improve power factor, reduce line losses, enhance power quality, and increase the transmission capacity and stability of the grid. This ensures that power equipment operates in a more stable and reliable environment, while also boosting the grid’s a