Homework Answers
3. Use mesh-current method to find the steady-state expression for io(t). vs1 60 cos(40,000t)V v,,-90 sin(40,000t...
3. Use mesh-current method to find the steady-state expression for io(t). vs1 60 cos(40,000t)V v,,-90 sin(40,000t + 180°) V si- 202
Problem 2: Find the nodal voltages and the current I. 30 40 V 60
Problem 2: Find the nodal voltages and the current I. 30 40 V 60
Question 1 Question 2 In the circuit shown, find V. 41-90° V 40 212 212 24/0°...
Question 1
Question 2
In the circuit shown, find V. 41-90° V 40 212 212 24/0° v (5) +-j412 322 v. Ideal A 13.8-KV 10-MVA 0.8-PF-lagging 60-Hz two-pole Y-connected steam-turbine generator has a synchronous reactance of 12 per phase and an armature resistance of 1.5 2 per phase. (a) What is the magnitude of Ea at rated conditions? (b) What is the torque angle of the generator at rated conditions? (c) If the field current is constant, and ignoring RA,...
A 12 kV, 300 MVA synchronous generator is tested at a field current of 200 A....
A 12 kV, 300 MVA synchronous generator is tested at a field current of 200 A. The open-circuit voltage was found to be 10 kV and the short-circuit current was 7.5 kA. The stator resistance was measured at 0.1 ohms per phase. i) Find the value of the synchronous reactance in per-unit. [ 2 marks ] ii) The synchronous generator is delivering half rated output at a terminal voltage of 5% below rated voltage and a power factor of 0.7...
Three single-phase transformers rated at 250 kVA, 7200 V/600 V, 60 Hz, are connected in wye- delta on a 12.47 kv, 3-phase line. If the load is 450 kVA, calculate: a. The currents in the incoming a...
Three single-phase transformers rated at 250 kVA, 7200 V/600 V, 60 Hz, are connected in wye- delta on a 12.47 kv, 3-phase line. If the load is 450 kVA, calculate: a. The currents in the incoming and outgoing transmission lines b. The currents in the primary and secondary windings 1. sratod t 200 w 3o0 v/6oO V 60 Hz are used to raise the
Three single-phase transformers rated at 250 kVA, 7200 V/600 V, 60 Hz, are connected in wye-...
(40%) Problem 2 of 3: An engine-generator set is paralleled with a 13.2 kv, 60 Hz infinite (utili...
please show steps. Thank you.
(40%) Problem 2 of 3: An engine-generator set is paralleled with a 13.2 kv, 60 Hz infinite (utility) bus to deliver power to a 2000 kw plant load at 0.866 lagging power factor. The synchronous generator is wye-connected and rated 3750 kva, 13.2 kv, and 0.8 power factor lagging with 1.0 per unit synchronous reactance and negligible armature resistance. 13.2 kVI 60 Hz I infinite bus utility) rated: 3750 kva 0.8 lag load: 2000 kW...
1. ( 4 points) Find the remaining sides of a 30° – 60° – 90° triangle...
1. ( 4 points) Find the remaining sides of a 30° – 60° – 90° triangle if the longest side is 40. 2. ( 4 points) A propeller with radius 9 feet is rotating at 20 revolutions per minute. Find the linear velocity of the tip of the propeller. Give the exact value and an approximation to the three significant digits.
32. A transformer is to be designed to increase the 30 kV-rms output of a generator...
32. A transformer is to be designed to increase the 30 kV-rms output of a generator to the transmission-line voltage of 345 kV-om. If the primary winding has 80 turns, how many turns must the secondary have? b. 70 c. 920 d. 9200 e 12 33. The primary winding of an electric train transformer has 400 turns and the Secondary has 50. If the input voltage is 120V(rms) what is the output voltage? a. 15 V (rms) b. 30 Vrms)...
r(t) = 10 sin(300t + 60°) cos(x - 90) sin(x) v(t) 10 cos(300t- 30°) ω =...
r(t) = 10 sin(300t + 60°) cos(x - 90) sin(x) v(t) 10 cos(300t- 30°) ω = 300, Mag = 10, θ =-30° v 102-30 MLP Mcos(P) +jMsin(P) v = 10 cos(-30) +j10 sin(-30) Step 1: Convert to Cosine Step 2: Identify Frequency, Magnitude, and Phase Step 3: Convert to real/imag form = 8.66-J5 Step 4: Solve Step 5: Convert Back
E8. 14 a) Find Vrms if v(0)-2+4cos(3t-30')+ 10sin(6t+ 60) v b) Find Irm, if i()-4cos(3t+30)+ 10sin(3t...
E8. 14 a) Find Vrms if v(0)-2+4cos(3t-30')+ 10sin(6t+ 60) v b) Find Irm, if i()-4cos(3t+30)+ 10sin(3t +60)+6sin(30) A e) If i)-2eos(2t -30) A, find i() at t-0.5 ms
3. Use mesh-current method to find the steady-state expression for io(t). vs1 60 cos(40,000t)V v,,-90 sin(40,000t + 180°) V si- 202
Problem 2: Find the nodal voltages and the current I. 30 40 V 60
Question 1
Question 2
In the circuit shown, find V. 41-90° V 40 212 212 24/0° v (5) +-j412 322 v. Ideal A 13.8-KV 10-MVA 0.8-PF-lagging 60-Hz two-pole Y-connected steam-turbine generator has a synchronous reactance of 12 per phase and an armature resistance of 1.5 2 per phase. (a) What is the magnitude of Ea at rated conditions? (b) What is the torque angle of the generator at rated conditions? (c) If the field current is constant, and ignoring RA,...
Three single-phase transformers rated at 250 kVA, 7200 V/600 V, 60 Hz, are connected in wye- delta on a 12.47 kv, 3-phase line. If the load is 450 kVA, calculate: a. The currents in the incoming and outgoing transmission lines b. The currents in the primary and secondary windings 1. sratod t 200 w 3o0 v/6oO V 60 Hz are used to raise the
Three single-phase transformers rated at 250 kVA, 7200 V/600 V, 60 Hz, are connected in wye-...
please show steps. Thank you.
(40%) Problem 2 of 3: An engine-generator set is paralleled with a 13.2 kv, 60 Hz infinite (utility) bus to deliver power to a 2000 kw plant load at 0.866 lagging power factor. The synchronous generator is wye-connected and rated 3750 kva, 13.2 kv, and 0.8 power factor lagging with 1.0 per unit synchronous reactance and negligible armature resistance. 13.2 kVI 60 Hz I infinite bus utility) rated: 3750 kva 0.8 lag load: 2000 kW...
1. ( 4 points) Find the remaining sides of a 30° – 60° – 90° triangle if the longest side is 40. 2. ( 4 points) A propeller with radius 9 feet is rotating at 20 revolutions per minute. Find the linear velocity of the tip of the propeller. Give the exact value and an approximation to the three significant digits.
32. A transformer is to be designed to increase the 30 kV-rms output of a generator to the transmission-line voltage of 345 kV-om. If the primary winding has 80 turns, how many turns must the secondary have? b. 70 c. 920 d. 9200 e 12 33. The primary winding of an electric train transformer has 400 turns and the Secondary has 50. If the input voltage is 120V(rms) what is the output voltage? a. 15 V (rms) b. 30 Vrms)...
r(t) = 10 sin(300t + 60°) cos(x - 90) sin(x) v(t) 10 cos(300t- 30°) ω = 300, Mag = 10, θ =-30° v 102-30 MLP Mcos(P) +jMsin(P) v = 10 cos(-30) +j10 sin(-30) Step 1: Convert to Cosine Step 2: Identify Frequency, Magnitude, and Phase Step 3: Convert to real/imag form = 8.66-J5 Step 4: Solve Step 5: Convert Back
E8. 14 a) Find Vrms if v(0)-2+4cos(3t-30')+ 10sin(6t+ 60) v b) Find Irm, if i()-4cos(3t+30)+ 10sin(3t +60)+6sin(30) A e) If i)-2eos(2t -30) A, find i() at t-0.5 ms
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