Device, system, and method for oil-containing electrical power devices or transmission devices

A system, comprising:

• one or a plurality of oil-containing electrical power devices or transmission devices, and
• for each of the one or the plurality of oil-containing electrical power devices or transmission devices, a device comprising:
• a sensor that is configured to transmit one or more electromagnetic signals with variable frequencies in the range from 1 Hz to 3000 GHz at the same time into oil in the oil-containing electrical power device or transmission device and to receive reflected and/or propagated electromagnetic signals, and
• a processing device configured to:
• compare the received signals in a time domain and/or a frequency domain with first and second signals in the time domain and/or the frequency domain, wherein:
• the first signals in the time domain and/or the frequency domain are classified with respect to a physical property of oil, and
• the second signals in the time domain and/or the frequency domain are classified with respect to a chemical property of oil;
• and
• determine, based on the comparisons, an oil quality of the oil in the oil-containing electrical power device or transmission device.

A method for determining an oil quality of an oil-containing electrical power device or transmission device, the method comprising:

• arranging a plurality of sensors at or in different openings and/or valves of an oil-containing electrical power device or transmission device;
• transmitting, by the plurality of sensors, electromagnetic signals with variable frequencies in the range from 1 Hz to 3000 GHz at the same time into the oil in the oil-containing electrical power device or transmission device;
• receiving, by the plurality of sensors, reflected and/or propagated electromagnetic signals;
• comparing, with a processing device, the received signals in a time domain and/or a frequency domain with first and second signals in the time domain and/or the frequency domain, wherein:
• the first signals in the time domain and/or the frequency domain are classified with respect to a physical property of oil, and
• the second signals in the time domain and/or the frequency domain are classified with respect to a chemical property of oil;
• and
• determining, with the processing device and based on the comparisons, an oil quality of the pol in the oil-containing electrical power device or transmission device.