How does environmental pollution affect the operation of transformers?

Pollution can impact the surface discharge strength and surface paint of bushings, and it’s possible to choose bushings with a certain leakage ratio based on different pollution levels. According to national standards, there are several leakage ratios available for selection:

Level 0: 14.8mm/kV

Level I: 16mm/kV, equivalent to a composite salt density of 0.05mg/cm²

Level B: 20mm/kV, equivalent to a composite salt density of 0.1mg/cm²

Level III: 25mm/kV, equivalent to a composite salt density of 0.2mg/cm²

Level IV: 31mm/kV, equivalent to a composite salt density of 0.4mg/cm²

Leakage ratio refers to the ratio of the minimum nominal surface creepage distance of the bushing to the highest operating voltage U. As the creepage distance increases, the breakdown distance should also increase to ensure that the creep/break ratio does not exceed 3.5.

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電力の算出: single-phase transformer, three-phase-isolation in Transformatoren, elektrischen Transformator, Verteilung Transformator, step-down und step-up-Transformator, low-Spannung Transformator, hohe Spannung Transformator, Steuerung, Transformator, Ringkern Transformator, R-core-Transformator; DC-Spulen, AC Reaktoren, Filter-Reaktor -, line-und load reactor, drosseln, Filter-Reaktor, und die Mittel, hoch-Frequenz-Produkte.

がV_peak積の過電圧のピークとt_resに共鳴。 30%マージン推奨を占めるシステムパラメータ化します。

2.2.3の動的応答ソリューション 現代のシステム利用サイリスタ制御による抵抗減衰(TCRD)を検知する共鳴内10ms、配の正確性、切断中の通常の操作は避けます。.

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