3-phase Delta example

# 3-phase Delta example - a For an ABC phase sequence V AB...

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EE369 – Industrial Automation Delta System Examples THREE PHASE DELTA – BALANCED LOADS Per phase impedance=50 80 ° Line voltage: 480 Volts Frequency: 60 Hz Phase sequence: ABC Reference is V BC Calculate phase currents, line currents, and total apparent power. a) For an ABC phase sequence: V AB =480 120 Volts V BC =480 0 ° Volts V CA =480 -120 ° Volts b) I AB =480 120 ° V ÷ 50 80 ° = 9.60 40 ° A I BC =480 0 ° V ÷ 50 80 ° = 9.6 -80 ° A I CA =480 -120 ° V ÷ 50 80 ° = 9.6 160 ° A c) I LA =I AB -I CA =16.627 10 ° A I LB =I BC -I AB =16.627 -110 I LC =I CA -I BC =16.627 130 ° A d) S T = 3 x 480 V x 16.627 A = 13.82343 kVA THREE PHASE DELTA – UNBALANCED LOADS Phase AB=40 0 ° Phase BC=60 0 ° Phase CA=100 0 ° Line voltage: 600 Volts Frequency: 60 Hz Phase sequence: ABC Reference is V BC Calculate phase currents, line currents and total real power.

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Unformatted text preview: a) For an ABC phase sequence: V AB =600 ∠ 120 Volts V BC =600 ∠ ° Volts V CA =600 ∠-120 ° Volts b) I AB =600 ∠ 120 ° V ÷ 40 ∠ ° Ω = 15 ∠ 120 ° A I BC =600 ∠ ° V ÷ 60 ∠ ° Ω = 10 ∠ ° A I CA =600 ∠-120 ° V ÷ 100 ∠ ° Ω = 6 ∠-120 ° A c) I LA =I AB-I CA =18.7349 ∠ 103.89 ° A I LB =I BC-I AB =21.7945 ∠-36.59 ° A I LC =I CA-I BC =14 ∠-158.21 ° A d) P AB =600 ∠ 120 ° V x 15 ∠ 120 ° A = 9 ∠-120 ° kW P BC =600 ∠ ° A x 10 ∠ ° A = 6 ∠ ° kW P CA =600 ∠-120 ° V x 6 ∠-120 ° A = 3.6 ∠ 120 ° kW P T =P AB +P BC +P CA =18.6 kW 2...
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## This note was uploaded on 03/21/2012 for the course EE 369 taught by Professor Khan during the Fall '10 term at Mohawk College.

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3-phase Delta example - a For an ABC phase sequence V AB...

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