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.
Quick Answer. The berries of the nandina plant contain hydrocyanic acid and are poisonous. They are toxic to cats, dogs and other grazing animals, and they can cause animals to experience seizures, comas, respiratory failure and death. They are considered nontoxic to humans but may cause stomach pain if ingested. Continue Reading.