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In a Delta Connection, there are only 3 wires for distribution and all the 3 wires are phases (no neutral in a Delta connection).
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The following image shows a typical Star Connection. If the Neutral point is also used (which often it is), the it is called 3 Phase 4 Wire system. If only the three phase wires are used, then it is called 3 Phase 3 Wire system. Due to its shape, the star connection is sometimes also called as Y or Wye connection. In a Star Connection, the 3 phase wires are connected to a common point or star point and Neutral is taken from this common point. Comparison between Star and Delta Connections.They are: Star (also called Y or Wye) and Delta (Δ). To know more about single phase and three phase, read the Difference Between Single Phase and Three Phase Power Supplies tutorial.įurther, the three – phase electric power system can be arranged in two ways. Hence, most of the power generated and distributed is actually a 3 – phase power (but majority of households will receive a single phase supply). It is more economical to transmit power using a 3 – phase power supply when compared to a single phase power supply as a three – phase supply can transmit three times the power with just three conductors when compared to a two – conductor single – phase power supply. In a three – phase system, we have a minimum of three conductors or wires carrying AC voltages. A Star Connection is a 4 – wire system and a Delta Connection is a 3 – wire system.īefore going in to details of the Star Connection, Delta Connection and comparing those two, let us have a very brief note on three – phase electric power.Ī single phase system consists of just two conductors (wires): one is called the phase (sometimes line, live or hot), through which the current flows and the other is called neutral, which acts as a return path to complete the circuit.
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Star and Delta Connections are the two types of connections in a 3 – phase circuits.