For dry-type transformers having a 220 [degrees] C insulating system and a winding hot-spot temperature of 220 [degrees] C, and with no unusual operating conditions present, the 20-yr life expectancy is a reasonable time frame.he 80 [degrees] C transformer requires operation at 75% or more of full load for a 2-yr payback, and at 100% load to payback in 1 yr over the 150 [degrees] C transformer.
Exposure to arsenic through drinking water is a great threat to human health. Arsenic is a carcinogen and its consumption can negatively affect the gastrointestinal tract and cardiac, vascular and central nervous systems.
Excluding other conditions that may cause these signs and symptoms should not lead to a final diagnosis unless there is evidence of arsenic poisoning and positive test results. 1  Vomiting. 2  Diarrhea â with severe gastrointestinal bleeding, black diarrhea may be evident.3  Hypersalivation â increased saliva production.he symptoms may be experienced almost immediately after consuming drink or food containing arsenic or it may only be present 30 to 60 minutes after consumption. This depends on the quantity of arsenic within the food or drink and the type of food ingested.