The Effect Of Ambient Humidity On The Internal Insulation Performance Of Frequency Converters

When humidity increases significantly, water vapor in the air accumulates inside the control cabinet and on the surface of the printed circuit board, forming a thin water film on the surface of the frequency converter 60hz to 50hz 3 phase insulator. This water film is conductive and can induce leakage current in high-voltage areas, causing a sharp drop in insulation resistance.

During long-term operation of the frequency converter 60hz to 50hz single phase, condensation often occurs in high-humidity environments. This condensation not only affects the surface resistance of the insulating medium, but may also seep into the tiny gaps between components, making the insulation structure, which was originally in a dry state, unstable. When the ambient humidity exceeds approximately 90% and a temperature difference exists, internal condensation is more likely to occur, reducing insulation strength and increasing the risk of short circuits or grounding faults.

High humidity also accelerates the aging process of internal materials. Long-term moisture erosion affects the properties of insulation materials, accelerates the degradation of printed circuit board and component packaging materials, and makes them more prone to breakdown under electrical stress.