### 11-differences between star connection and delta connections

11-differences between start connection and delta connections

 Sl No. Star connection Delta connection 1 Two types of star connections are possibleA-4-wire, 3-phase systemB-3 wire. 3-phase system Only 3 wire. 3-phase system is possible 2 Out of 4 wires, 3 wires are the phases and one is neutral All 3 wires are phases in Delta connection 3 In start connection, one end of all the three wires are connected to a common point in the shape of Y to form neutral In Delta connection every wire is connected to two adjacent wires in the form of triangle.And all the three common points of the connection form the three phases 4 Line current and phase currents are same Line current and phase current are different.Line current =√Phase current 5 Line voltage and phase voltages are different, Line voltage =√Phase voltage Line voltage and phase voltages are same 6 Since line voltage is more than phase voltage, insulation required for each phase is less In Delta connection line and phase voltages are same hence more insulation is required 7 Start connections are used for both transmission and distribution applications/networks This connection is generally used for distribution networks 8 Since insulation required is less, these connections are used for longer distances Since insulation required is more, these connections are used for shorter distances 9 Start connections are used where less starting current and starting torque is required Delta connections are used where starting current and Torque is more 10 Power calculation in Start connections. P = 3 X Vp X Ip X Cosθ Or  P = (√3 X VL) X IL X Cosθ Power calculation in Delta connections. P = 3 X Vp X Ip X Cosθ Or  P = (√3 X IL) X VL X Cosθ 11 In star connections different voltage levels are used as line voltage & phase voltages are different In Delta connections, only single voltage is used

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### 11-differences between star connection and delta connections

11-differences between start connection and delta connections Sl No. Star connection Delta connection 1 Two types of star connections are ... 