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...
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.
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...
[29] SECTION B: TRANSFORMERS QUESTION 2 2.1 A 240:48-volt, 50-F power factor of 0.8 lagging. If...
[29] SECTION B: TRANSFORMERS QUESTION 2 2.1 A 240:48-volt, 50-F power factor of 0.8 lagging. If the no load current and iron loss of this e transformer supplies a load of 10 ampere at a ampere and 12-watt respectively, calculate the total current supplied and the powe oad current and iron loss of this transformer are factor. (7) KVA, 50-Hz, 1200:230-volt single phase transformer has the following series impedance values: Z1 = (0.047 +0.112) Z2 = (0.00172 +0.00411)2 Calculate: 2.2.1...
solve no: 3.14 , 3.16, 3.19 please show each step and solve for beginners 120 Power...
solve no: 3.14 , 3.16, 3.19
please show each step and solve for beginners
120 Power System Analysis 3.12. A single-phase system similar to that shown in Figure 3.11 has two transformers A-B a B-C connected by a line B feeding a load at the receiving end C. The ratings and parame ter values of the components are 500 V/1.5 kV, 9.6 kVA. leakage reactance 5 % 1.2 kV/120 V, 7.2 kVA, leakage reactance 4 % series impedance (0.5 +...
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...
[29] SECTION B: TRANSFORMERS QUESTION 2 2.1 A 240:48-volt, 50-F power factor of 0.8 lagging. If the no load current and iron loss of this e transformer supplies a load of 10 ampere at a ampere and 12-watt respectively, calculate the total current supplied and the powe oad current and iron loss of this transformer are factor. (7) KVA, 50-Hz, 1200:230-volt single phase transformer has the following series impedance values: Z1 = (0.047 +0.112) Z2 = (0.00172 +0.00411)2 Calculate: 2.2.1...
solve no: 3.14 , 3.16, 3.19
please show each step and solve for beginners
120 Power System Analysis 3.12. A single-phase system similar to that shown in Figure 3.11 has two transformers A-B a B-C connected by a line B feeding a load at the receiving end C. The ratings and parame ter values of the components are 500 V/1.5 kV, 9.6 kVA. leakage reactance 5 % 1.2 kV/120 V, 7.2 kVA, leakage reactance 4 % series impedance (0.5 +...
Most questions answered within 3 hours.
-
1a) According to the ideal gas law, _______________.
a. a gas has infinite volume at absolute...
asked 34 minutes ago -
Oakdale Fashions, Inc. had $245,000 in 2018 taxable income.
Using the tax schedule in Table 2.3...
asked 58 minutes ago -
The marketing class at CSUS had an average score of 150. An
educational analyst determined that...
asked 2 hours ago -
Justin Case has purchased a $250 000 home by putting 20 % down
and taking out...
asked 2 hours ago -
1. In a labor market, marginal cost for a firm is
____________.
a. recruiting cost
b....
asked 2 hours ago -
On January 1, 2019, ABC Company issued $60,000,000 of 20-year,
10.5% bonds when the market rate...
asked 3 hours ago -
39.4% of US homes continue to use a landline in addition to cell
phone service. 3...
asked 4 hours ago -
Starting with benzene, synthesize 1-phenyl-1-butyne.
Show intermediates and reagents.
asked 4 hours ago -
Create a 32-run crossed array design with six control factors
and two noise factors such that...
asked 5 hours ago -
A 500g sample of sand from source A has the following amounts
retained on each sieve....
asked 5 hours ago -
In
your own words, please explain the essay by John Keynes wrote "The
End of Laissez...
asked 5 hours ago -
How are the matrix and pixels related? Why are smaller
pixels better for diagnostic quality?
asked 5 hours ago