TREATMENT OPTIONS – Trojan Dry Out System / Trojan HV
When the Trojan is connected and commissioned, select the “Treatment Options” and select from the three optional Treatment Cycle options. The operator enters the hours into the PLC screen for those functions required. If there are no hours entered against the option, it will not perform it.
Analysis Cycle
Analysis can be set for between 0 to 999 hours. Oil is drawn from the transformer into the Trojan past the water in oil sensor and returned to the transformer unfiltered. At 30 minute intervals the oil temperature, relative saturation and water in oil ppm are recorded.
Degassing Cycle (low vacuum)
Unlike traditional vacuum dehydration systems, the oil is not heated. As a result there is no degradation to the oil quality. During this cycle water and particles are also filtered from the oil. Degassing is recommended from time to time to prevent gas saturation, and remove oxygen from the oil to prevent oxidation.
The primary function of the Trojan LV degassing cycle is to remove a high percentage of the dissolved gases from the oil as a general clean up, and to minimise the occurrence of bubble evolution on wet transformers which can occur during a rapid rise in temperature.
Degassing Cycle (high vacuum) – Trojan HV System only
The vacuum pump on the Trojan HV is sized to progressively reduce gas saturated oil (>10% by volume) to under 1% by continuously circulating the total oil volume while the transformer remains energised.
Unlike traditional high vacuum dehydration systems, the oil is not heated by the Trojan System during this cycle.
Water Filtering - Filter Re-Dry cycles
The Trojan Filter’s the oil for the number of hours the operator enters into the PLC, and stores the water in the Filters. At the end of the hours the flow of oil from the transformer stops while the Trojan automatically Re-Dries the Filters. After the Filter Re-Dry, the Trojan returns to the Filtering Cycle for the selected hours and then Re-Dry’s. These cycles continue until the Trojan is stopped. Re-Drying the Filters significantly improves the water removal efficiency.