6. An 8 pole, 30 diesel generator has a line voltage of 450V at 62.5 Hz when its circuit breaker is open. At full load it supplies a line current of 410 Amps at a power factor of 0.83 lagging, its line voltage droops to 440V and the frequency droops to 60.0 Hz. The generator's full load efficiency is 85%. The efficiency of the diesel engine is 36%. a) What is the generator's % voltage regulation? b) What is the diesel engine's no load speed RPM, its full load speed RPM and its % speed regulation? c) What is the alternator's output apparent kVA, active kW, and reactive kVar power at full load?

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter2: Fundamentals
Section: Chapter Questions
Problem 2.16P: A single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and...
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6. An 8 pole, 30 diesel generator has a line voltage of 450V at 62.5 Hz when its circuit breaker is
open. At full load it supplies a line current of 410 Amps at a power factor of 0.83 lagging, its line
voltage droops to 440V and the frequency droops to 60.0 Hz. The generator's full load efficiency
is 85%. The efficiency of the diesel engine is 36%.
a) What is the generator's % voltage regulation?
b) What is the diesel engine's no load speed RPM, its full load speed RPM and its % speed
regulation?
c) What is the alternator's output apparent kVA, active kW, and reactive kvar power at full load?
d) What is the full load output power in horsepower and shaft torque in kNm of the diesel
engine?
e) What are the power losses in the generator and diesel in kW?
f) The diesel burns heavy fuel oil with a calorific value of 40.7 MJ/kg. Estimate the engine's fuel
consumption in kg/hour at full load.
Transcribed Image Text:6. An 8 pole, 30 diesel generator has a line voltage of 450V at 62.5 Hz when its circuit breaker is open. At full load it supplies a line current of 410 Amps at a power factor of 0.83 lagging, its line voltage droops to 440V and the frequency droops to 60.0 Hz. The generator's full load efficiency is 85%. The efficiency of the diesel engine is 36%. a) What is the generator's % voltage regulation? b) What is the diesel engine's no load speed RPM, its full load speed RPM and its % speed regulation? c) What is the alternator's output apparent kVA, active kW, and reactive kvar power at full load? d) What is the full load output power in horsepower and shaft torque in kNm of the diesel engine? e) What are the power losses in the generator and diesel in kW? f) The diesel burns heavy fuel oil with a calorific value of 40.7 MJ/kg. Estimate the engine's fuel consumption in kg/hour at full load.
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