What is a Delta connection?
A delta connection is a term used for describing the connections used on 3 phase transformers, or 3 single phase transformers when connected to a 3 phase supply (sometimes referred to as closed delta connections). The connection used is very similar to an equilateral triangle or the symbol delta. each single phase transformer is represented by one side of the delta or equilateral triangle. The three transformers are connected together at the corners of the delta. The supply lines or load lines are also connected at the same junctions from each corner. This results in a 3 wire, 3 phase system.
