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.
That may help to account for the wide range of toxic effects of arsenic. The most obvious and immediate cases of arsenic poisoning have occurred when a large dose of arsenic is taken (or given!) in a short period of time. This kind of exposure is called acute arsenic poisoning, and some of the symptoms are: 1  Vomiting. 2  Throat and stomach pain. 3  Bloody diarrhea. 4  Eventually it may lead to shock, seizure, coma and death.