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Student & Learning Zone - City & Guilds
Three phase basic question
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<blockquote data-quote="Traineesparks" data-source="post: 261514" data-attributes="member: 15955"><p>Hi, i am just doing some revision on three phase and ive come across a question which i would just like some clarification on the correct answer please</p><p></p><p>Question -</p><p></p><p>A balance star - connected three phase load of 10ohms per phase is supplied from a 400V 50 Hz mains supply at unity power,</p><p></p><p>Calculate the a) phase voltage</p><p></p><p>B) line current</p><p></p><p>c) the total power consumed</p><p></p><p>Ok so im happy with my 1st answer as 230.94V Because VL = 1.732 X VP so 400V / 1.732 = 230.94V</p><p></p><p>But on question b to work out the line current do i divide 230V (Phase Voltage) by 10 ohms or 400V (Line Voltage) by 10 ohms</p><p></p><p>I am sure it is the Phase Voltage 230V but just want a few yes' lol</p><p></p><p>thanks</p></blockquote><p></p>
[QUOTE="Traineesparks, post: 261514, member: 15955"] Hi, i am just doing some revision on three phase and ive come across a question which i would just like some clarification on the correct answer please Question - A balance star - connected three phase load of 10ohms per phase is supplied from a 400V 50 Hz mains supply at unity power, Calculate the a) phase voltage B) line current c) the total power consumed Ok so im happy with my 1st answer as 230.94V Because VL = 1.732 X VP so 400V / 1.732 = 230.94V But on question b to work out the line current do i divide 230V (Phase Voltage) by 10 ohms or 400V (Line Voltage) by 10 ohms I am sure it is the Phase Voltage 230V but just want a few yes' lol thanks [/QUOTE]
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Three phase basic question
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