The three tools described below are part of a university’s machine shop. Each piece of equipment is a balanced three-phase load rated at 220 V. Calculate (a) the magnitude of the line current supplying these three tools and (b) the power factor of the combined load. Drill press: 10.2 kVA at 0.87 pf lag. Lathe: 4.2 kW at 0.91 pf lag. Band saw: line current 36.8 A, 7.25 kVAR.

Question

The three tools described below are part of a university’s machine shop. Each piece of equipment is a balanced three-phase load rated at 220 V. Calculate

(a) the magnitude of the line current supplying these three tools and

(b) the power factor of the combined load. Drill press: 10.2 kVA at 0.87 pf lag. Lathe: 4.2 kW at 0.91 pf lag. Band saw: line current 36.8 A, 7.25 kVAR.

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