TABLE 64.1 An a Single-Phase 2400: 240V 100-kVA Transformer Voltage and Power Ratings HV(Line-V) LV(Line-V) S(Total-kVA) 240 100 Test Data hort Circuit(Hv) Values Open Circuit(Lv) values Voltage = 211.01 240.0 volts Current= 41.67 120 amperes Power 1400.0 Equivalent Circuit Values(in ohms) HV Si LV Side Per- Unit Series Resistance 0.008064 0.0l40 Series Reactance 4.99970.0499970.08680 Shunt Magnetizing Reactance 1097.10 0.97141905 Shunt Core Loss Resistance 7314.3073.1429 126.98 Power Facto Efficiency Power Factor Effciency Regulation 0.0000lead 0.00 0.9000l 9754 5.29 8000l 6.50 0.2000lead 0.7000l .3000 lead 0.6000l 0.4000lead 0.5000l 0.5000lead 95.99 0.4000l 8.54 0.6000 lead 0.7000 lead 970 0.2000l 0.8000lead 9741 1000 lag 81.09 2.16 00000lag .0000 Secondary Quantities; LOW Voltage Side Primary Quantities; HIGH Voltage Side SI Per- Unit SI Units Per- Unit 40 volts 1.0000 2539 volts 16.7 amperes Apparent power 100.0 kVA Apparent power 109.9kva es 1.0386 Current Real power eactive power 64.6 kvar 0.6456 Power factor Power facto 0.8091lag 0.809 alation=5.77%6 c 1999 by© 1999 by CRC Press LLC TABLE 64.1 Analysis of a Single-Phase 2400:240V 100-kVA Transformer Voltage and Power Ratings HV (Line-V) LV (Line-V) S (Total-kVA) 2400 240 100 Test Data Short Circuit (HV) Values Open Circuit (LV) Values Voltage = 211.01 240.0 volts Current = 41.67 22.120 amperes Power = 1400.0 787.5 watts Equivalent Circuit Values (in ohms) Values referred to HV Side LV Side Per-Unit Series Resistance = 0.8064 0.008064 0.01400 Series Reactance = 4.9997 0.049997 0.08680 Shunt Magnetizing Reactance = 1097.10 10.9714 19.05 Shunt Core Loss Resistance = 7314.30 73.1429 126.98 Power Factor Efficiency Voltage Power Factor Efficiency Voltage (—) (%) Regulation (%) (—) (%) Regulation (%) 0.0000 lead 0.00 –8.67 0.9000 lag 97.54 5.29 0.1000 lead 82.92 –8.47 0.8000 lag 97.21 6.50 0.2000 lead 90.65 –8.17 0.7000 lag 96.81 7.30 0.3000 lead 93.55 –7.78 0.6000 lag 96.28 7.86 0.4000 lead 95.06 –7.27 0.5000 lag 95.56 8.26 0.5000 lead 95.99 –6.65 0.4000 lag 94.50 8.54 0.6000 lead 96.62 –5.89 0.3000 lag 92.79 8.71 0.7000 lead 97.07 –4.96 0.2000 lag 89.56 8.79 0.8000 lead 97.41 –3.77 0.1000 lag 81.09 8.78 0.9000 lead 97.66 –2.16 0.0000 lag 0.00 8.69 1.0000 — 97.83 1.77 Rated load performance at power factor = 0.866 lagging. Secondary Quantities; LOW Voltage Side Primary Quantities; HIGH Voltage Side SI Units Per-Unit SI Units Per-Unit Voltage 240 volts 1.0000 Voltage 2539 volts 1.0577 Current 416.7 amperes 1.0000 Current 43.3 amperes 1.0386 Apparent power 100.0 kVA 1.0000 Apparent power 109.9 kVA 1.0985 Real power 86.6 kW 0.8660 Real power 88.9 kW 0.8888 Reactive power 50.0 kvar 0.5000 Reactive power 64.6 kvar 0.6456 Power factor 0.8660 lag 0.8660 Power factor 0.8091 lag 0.8091 Efficiency = 97.43%; voltage regulation = 5.77%