The current generated when a direct current voltage is applied at both ends of the insulation material can be divided into two parts: volume leakage current and surface leakage current. The current values of these two parts are generally very small, measured in microamperes (μ A); The size of the l

I、 Concept: Refers to the distortion of current or voltage waveforms, which is a sine wave component that is an integer multiple of the fundamental frequency. For example, in a 50Hz power system, 100Hz, 150Hz, 200Hz, etc. are all harmonics.II、 Causes: Mainly caused by nonlinear loads, such as freq

When a power transformer is working normally, the transformer core and clamps are usually grounded at one point. If there are two or more grounding points on the iron core or clamping components, a closed circuit is formed between the two points. Under the action of the transformer leakage magnetic

The main factors affecting the insulation performance of the transformer are: temperature, humidity, oil protection method, and overvoltage effect.1. The effect of temperature.The power transformer is oil and paper insulation, and the water content in the oil and paper at different temperatures has