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For a 45-kVA, three-phase, wye-connected, 220- V synchronous machine at rated armature current, the short-circuit load loss (total for three phases) is 1.80 kW at a temperature of 25°C. The dc resistance of the armature at this temperature is 0.0335 Ω per phase. Compute the effective armature ac resistance in per unit and in ohms per phase at 25°C.
A three-phase, wye-connected, 2500-kVA, 6600- V, 60-Hz turbo alternator has a per-phase synchronous reactance and an armature resistance of 10.4 and 0.071 Ω, respectively. Compute the power factor for zero voltage regulation on full load.
Three identical impedances of 30 ∠30° Ω are connected in delta to a three-phase 173-V system by conductors that have impedances of 0.8 + j0.6 Ω each. Compute the magnitude of the line-to-line voltage at the terminals of the load.
Then find the voltage across the 50-Ω resistor and the total power supplied by the source
how much new capital must be supplied to make the purchase?
Use the information in the above table to compute the Control Limits for an Average and a Range Control Chart.
Determine the synchronous speed in revolutions per minute and the useful torque in new ton meters of a 200-hp, 60-Hz, six-pole synchronous motor operating at its rated full load (1 hp ≅ 746 W).
What is the resultant force of the entire system? What are the magnitude and direction of acceleration of the weights?
It is common that people are exposed to more than one hazardous substance at a time. The different substances may interact such that one substance may alter the toxicity of one or more of the chemicals present. Discuss the possible interactions th..
determine the maximum value of the voltage induced in the coil.
A 1-liter container of nitrogen gas (N2) at a temperature of 23c is intially at a pressure of 1.25 atm. because of a slow leak the pressure falls to 1.15 atm 1 hour later what is the leak rate in molecules/second?
Determine the resultant line current and power factor.
The Cookenwythe Gas Company pumps propane gas to the nearby Noxious Chemicals, Inc., polypropylene production plant. The gas is metered at the noxious plant at 400m3/h at 4.7atm gauge and 30°C.
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