Self-learning system, which is recommended for use with OLTC and transformers main tank (power transformers, generator step-up transformers, phase shifters, shunt reactors) with cyclic loading.

In addition to monitoring the humidity, it determines a time window in which the oil expansion vessel expels air and the dehydrating chambers are regenerated.

In maintenance free Dehydrating breather normal operation, the air flowing to the oil conservator has to pass the silica gel and is dried on the way. A moisture sensor continually measures the humidity of the air in the pipeline and the results are sent to the electronic controller. When the humidity (%RH) of the air in the pipe line exceeds a selected value, the self-regulating heating element inside the silica gel container is activated. The water vapor that escapes from the silica gel condenses on the specially shaped bottom casting and drips out of the filter system.

Advantages:

• Reduce maintenance costs with learned transformer breathing patterns and self-regenerating desiccant
• Maintenance free system increases operation reliability and avoids big problems since there is no more risk of moisture penetration.
• No more environmental pollution or disposal problems because of old drying agent.
• It communicates both locally and remotely.
• Robust: major parts are aluminum and polycarbonate.