Star (Y) Connection Delta (Î”) Connection In STAR connection, the starting or finishing ends (Similar ends) of three coils ar...

 Star (Y) Connection Delta (Î”) Connection In STAR connection, the starting or finishing ends (Similar ends) of three coils are connected together to form the neutral point. A common wire is taken out from the neutral point which is called Neutral. In DELTA connection, the opposite ends of three coils are connected together. In other words, the end of each coil is connected with the start of another coil, and three wires are taken out from the coil joints There is a Neutral or Star Point No Neutral Point in Delta Connection Three phase four wire system is derived from Star Connections (3-Phase, 4 Wires System) We may Also derived 3 Phase 3 Wire System from Star Connection Three phase three wire system is derived from Delta Connections (3-Phase, 3 Wires System) Line Current is Equal to Phase Current. i.e. Line Current = Phase Current IL = IPH Line Voltage is Equal to Phase Voltage. i.e. Line Voltage = Phase Voltage VL = VPH Line Voltage is √3 times of Phase Voltage. i.e. VL = √3 VPH Line Current is √3 times of Phase Current. i.e. IL = √3 IPH The Total Power of three phases could be found by P = √3 x VL x IL x CosÐ¤ …. Or P = 3 x VPH x IPH x CosÐ¤ The Total Power of three phases could be found by P = √3 x VL x IL x CosÐ¤ … or P = 3 x VPH x IPH x CosÐ¤ The speeds of Star connected motors are slow as they receive 1/√3 voltage. The speeds of Delta connected motors are high because each phase gets the total of line voltage In Star Connection, the phase voltage is low as 1/√3 of the line voltage, so, it needs low number of turns, hence, saving in copper. In Delta connection, The phase voltage is equal to the line voltage, hence, it needs more number of turns. Low insulation required as phase voltage is low Heavy insulation required as Phase voltage = Line Voltage. In Power Transmission, Star Connection system is general and typical to be used. In Power Distribution and industries, Delta Connection is general and typical to be used.

Name

BASIC ELECTRICAL,12,BATTERIES,4,CIRCUIT THEORIES,9,CONTROL SYSTEMS,3,DC MOTOR,1,DIGITAL ELECTRONICS,1,DISTRIBUTED GENERATION,2,DISTRIBUTION,6,ELECTRICAL DRIVES,1,ELECTRICAL LAWS,8,ELECTRONICS DEVICES,2,General,7,GENERATION,3,GENERATOR,1,HIGH VOLTAGE,4,ILLUMINATION,1,INDUCTION MOTOR,7,MATERIALS,1,MEASUREMENT,1,MOTOR,1,POWER ELECTRONICS,2,PROJECTS ON INDUCTION MOTOR,1,PROTECTION,1,SMART GRID,3,SWITCHGEAR,4,SYNCHRONOUS MOTOR,1,TRANSFORMER,6,TRANSMISSION,4,
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Electrical for Us: Comparison between Star and Delta Connections
Comparison between Star and Delta Connections