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.
What is arsenic? 2. Where does environmental arsenic come from? 3. What are the levels of exposure to arsenic? 4. What happens to arsenic in the body? 5. What are the effects of arsenic on laboratory animals? 6. What are the effects of arsenic on the environment? 7. What are the effects of arsenic on human health? 7.1 Can arsenic cause cancer and skin changes? 7.2 What other health problems can arsenic cause? 7.1 Can arsenic cause cancer and skin changes? Long-term exposure to arsenic in drinking water can cause cancer in the skin, lungs, bladder and kidney.