Two shunt generators running in parallel share a load of 100 kW equally at a terminal...
- Two shunt generators running in parallel share a load of 100 kW equally at a terminal voltage of 230 V. On no-load, their voltages rise to 240 V and 245 V respectively. Assuming that their volt-ampere characteristics are rectilinear, find how would they share the load when the total current is reduced to half its original value? Also, find the new terminal voltage.
Answers: 20 kW
30 kW
and 236V.
Complete solution please.
Homework Answers
Add Answer to:
Two shunt generators running in parallel share a load of 100 kW
equally at a terminal...
Two shunt generators, each with a no-load voltage of 130 V are running parallel. Their external...
Two shunt generators, each with a no-load voltage of 130 V are running parallel. Their external characteristics can be taken as straight lines over this operating ranges. Generator No. 1 is rated at 35 kW and its full-load voltage is 120 V, Generator No. 2 is rated at 200 kW at 110 V. Calculate the busbar voltage when the total load is 22500 A. How is the load divided between the two?
A long-shunt compound generator running at 1000 r.p.m. supplies 22 kW at a terminal voltage of...
A long-shunt compound generator running at 1000 r.p.m. supplies 22 kW at a terminal voltage of 220 V. The resistance of the armature, shunt field and series field are 0.05 Ω, 110 Ω, and 0.06 Ω respectively. The overall efficiency at the above load is 88 %. Find (i) Cu losses (ii) iron and friction losses and (iii) torque exerted by the prime mover.
A 40 KW shunt generator produces terminal voltage of 220 V when running at 1500 rpm. What will be...
A 40 KW shunt generator produces terminal voltage of 220 V when running at 1500 rpm. What will be its terminal voltage when running at 1800 rpm? Ra-.3 3. Q and Rsh 150 ohms.
A 40 KW shunt generator produces terminal voltage of 220 V when running at 1500 rpm. What will be its terminal voltage when running at 1800 rpm? Ra-.3 3. Q and Rsh 150 ohms.
Q3) A 20 kW compound generator works on full load with terminal voltage of 230 V....
Q3) A 20 kW compound generator works on full load with terminal voltage of 230 V. The armature, series and shunt field resistances are 0.1, 0.05 and 115 ohm respectively. Calculate: a) The generated e.m.f , if connected short shunt. b) The generated e.m.f, if connected long shunt. c) If the machine is connect short shunt, the iron and friction losses at rated power equal to 850 W. calculate the mechanical efficiency, electrical efficiency and commercial efficiency.
6. Two identical 15 kV generators are to be connected in parallel. Both are running at...
6. Two identical 15 kV generators are to be connected in parallel. Both are running at rated speed and voltage. There is an open three pole 6-terminal single-throw fused switch between them, connected to the generator terminals (a1, b1.c1) and (a2,b2,c2) on each side, respectively. a1 b1 c1 = a2 b2 c2 Before we close the switch, we check the voltage across phase a with an ac voltmeter and find that Va1 Va2 = 0. With an oscilloscope, we display...
Show all working 1. A 4 pole, 220 V, 10 H.P, d.c. shunt motor is rotating...
Show all working 1. A 4 pole, 220 V, 10 H.P, d.c. shunt motor is rotating at a speed of 320 rpm. Then the developed useful torque is 2. A 4 pole, lap wound d.c. motor drawing an armature current of 20 A has 360 conductors. If the flux per pole is 0.015 Wb then the gross torque developed by the armature of motor is 3. A 220 V, d.c. motor draws an armature current of 20 A. Its armature...
Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs 30 kW...
Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs 30 kW at 0.8 power factor lagging. The line impedance is (1.4 +J1.6) Ω per phase between generator G1 and the load, and (0.8 +jl ) Ω per phase between generator G2 and the load. If generator Gl supplies 15 kW at 0.8 power factor lagging, with a terminal voltage of 460 V line- to-line, determine 1. The voltage at the load terminals. 2. The voltage...
Two dc generators (A) and (B) with the following characteristics: Generator (A): rated voltage = 150...
Two dc generators (A) and (B) with the following characteristics: Generator (A): rated voltage = 150 V, rated current = 30 Amp, and armature resistance = 0.4 Ω. Generator (B): no-load voltage = 160 V, rated current = 20 Amp, and armature resistance = 0.6 Ω. are connected in parallel. Find: a) Circulating no-load current and terminal voltage. b) The load current when generator B floating. c) The maximum possible load power.
A) The input current to a 220 V, short-shunt compound motor at no load is 6 A. The shunt- field c...
a) The input current to a 220 V, short-shunt compound motor at no load is 6 A. The shunt- field circuit resistance is 220 Ω; the armature resistance is 0.112, and the series-field resistance is 0.1 Ω, what is the stray power loss ? (b) Assume the input rating of the motor in Part (a) to be 66 A at 220 V with a no-load speed of 1000 rpm. If the stray power loss varies as the counter-electromotive force and...
please answer 13.16 at rated load of unity power factor and rated terminal voltage, determine efficienc...
please answer 13.16
at rated load of unity power factor and rated terminal voltage, determine efficienc including field rheostat loss. Ans. 93.139 13.11 A generator under test is rated at 100 KVA, 3-phase, 60-Hz; 2,400 volts. (a) If driven b a de motor unexcited, the motor output is 1.26 KW. (b) If driven by a de motor, generato on open circuit and excited to generate rated potential, the motor output is 2.5 KW. ( Ifdriven by a de motor, generator...
A 40 KW shunt generator produces terminal voltage of 220 V when running at 1500 rpm. What will be its terminal voltage when running at 1800 rpm? Ra-.3 3. Q and Rsh 150 ohms.
A 40 KW shunt generator produces terminal voltage of 220 V when running at 1500 rpm. What will be its terminal voltage when running at 1800 rpm? Ra-.3 3. Q and Rsh 150 ohms.
6. Two identical 15 kV generators are to be connected in parallel. Both are running at rated speed and voltage. There is an open three pole 6-terminal single-throw fused switch between them, connected to the generator terminals (a1, b1.c1) and (a2,b2,c2) on each side, respectively. a1 b1 c1 = a2 b2 c2 Before we close the switch, we check the voltage across phase a with an ac voltmeter and find that Va1 Va2 = 0. With an oscilloscope, we display...
Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs 30 kW at 0.8 power factor lagging. The line impedance is (1.4 +J1.6) Ω per phase between generator G1 and the load, and (0.8 +jl ) Ω per phase between generator G2 and the load. If generator Gl supplies 15 kW at 0.8 power factor lagging, with a terminal voltage of 460 V line- to-line, determine 1. The voltage at the load terminals. 2. The voltage...
a) The input current to a 220 V, short-shunt compound motor at no load is 6 A. The shunt- field circuit resistance is 220 Ω; the armature resistance is 0.112, and the series-field resistance is 0.1 Ω, what is the stray power loss ? (b) Assume the input rating of the motor in Part (a) to be 66 A at 220 V with a no-load speed of 1000 rpm. If the stray power loss varies as the counter-electromotive force and...
please answer 13.16
at rated load of unity power factor and rated terminal voltage, determine efficienc including field rheostat loss. Ans. 93.139 13.11 A generator under test is rated at 100 KVA, 3-phase, 60-Hz; 2,400 volts. (a) If driven b a de motor unexcited, the motor output is 1.26 KW. (b) If driven by a de motor, generato on open circuit and excited to generate rated potential, the motor output is 2.5 KW. ( Ifdriven by a de motor, generator...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago