appendix
appendix appendix
APPENDIX D CONTENTS APPENDIX D CONTENTS Rev. Jan 2011 Application Manual – Liquid Cooled Generator Sets APPENDIX D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D–2 Useful Formulas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D–2 D–1
Application Manual – Liquid Cooled Generator Sets APPENDIX D Useful Formulas TO OBTAIN: SINGLE–PHASE AC POW- ER kilowatts (kW) Volts x Amps x PF 1000 kVA Volts x Amps 1000 Amps p ( (kVA unknown) ) Amps p (kW ( unknown) ) Frequency q y (Hertz) ( ) kW x 1000 Volts x PF kVA x 1000 Volts # poles x rpm 120 THREE–PHASE AC POW- ER VoltsxAmpsxPFx1.732 1000 Volts x Amps x 1.732 1000 kW x 1000 Volts x PF x 1.732 kVA x 1000 Volts x 1.732 # poles x rpm 120 Reactive Power ( (kVAR) ) – – Volts x Amps x 1 PF2 � Volts x Amps x 1.732 x 1 PF 1000 2 � 1000 % Voltage g regulation g (f (for steady t d loads, l d from f No–Load to Full–Load) – � – VNL VFL � x 100 V FL � x 100 � V NL V FL % Frequency q y Regulation g – – (f (for steady t d loads l d from f No–Load to Full–Load) �FNL FFL � x 100 Horsepower p required q tto ddrive i a generator t kW 0.746 X Generator Efficiency First cycle y RMS short cir- cuit it current (±10%) D–2 APPENDIX D Rev. Jan 2011 V FL F FL � x 100 � F NL F FL Rated Amperes pu X��d F FL kW 0.746 X Generator Efficiency Rated Amperes pu X��d • “PF” refers to power factor, which is expressed as a decimal fraction. For example, 80% power factor = 0.8 for the purposes of calculations. In general, single–phase generator sets are rated at 100% power factor and three–phase generator sets at 80% power factor. • “Volts” refers to line–to–line voltage. • “Amps” refers to line current in amperes. • “F” refers to frequency. 0% frequency regulation is defined as isochronous.
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- Page 23 and 24: APPENDIX B CONTENTS APPENDIX B CONT
- Page 25 and 26: LINE APPENDIX B 3 2 1 Autotransform
- Page 27 and 28: LINE 3 2 1 APPENDIX B MOTOR STARTIN
- Page 29 and 30: APPENDIX B FULL-VOLTAGE KVA CURVE k
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APPENDIX D CONTENTS<br />
APPENDIX D CONTENTS<br />
Rev. Jan 2011<br />
Application Manual – Liquid Cooled Generator Sets<br />
APPENDIX D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D–2<br />
Useful Formulas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .<br />
D–2<br />
D–1
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