Method and sensor for monitoring the state of oil-filled transformers and / or electrical apparatus with insulating oils and for the determination of wear-dependent parameters such as the dielectric strength, the isolierölfeuchte, the acidification or of the loss factor of insulating oils

摘要

The invention relates to a method for a quasi continuous monitoring and measurement of the state of oil-filled transformers and / or devices, for the evaluation of which insulation, for the monitoring of electrical oils and for monitoring of electrical equipment in which insulating oils are used, and for a quasi continuous determination of the breakdown voltage, the moisture content, the acidification, the neutralization value and / or of the loss factor of insulating oils. According to the invention, for this purpose, the electrical conductivity of more or less continuously insulating oils used is measured, in addition, the dielectric constant and the measured the insulating oil temperature. From the measured variables, the electrical dielectric strength, the loss factor, the moisture content of the insulating oil, the neutralization value are determined and acidification.