Question: what is difference between delta and star connection?
Answer: In a Star Connection, there are 4 wires: 3 phase wires and 1 neutral wire whereas in a Delta Connection, there are only 3 wires for distribution and all the 3 wires are phases (no neutral in a Delta connection). ... Two types of Star Connection systems are possible: 4 – wire, 3 – phase system and 3 – wire 3 phase system.