The maximum efficiency of a 500 kVA, 3300/500 volts, 50 Hz, single - phase transformer is 97 % and occurs at 3/4th full load with unity p. f. If the impedance is 10 % calculate the regulation at full load and 0. 8 p. f. lagging.
Q: 120/480 V, 10 kVA two-winding transformer is to be used as an auto-transformer to supply a 480 V…
A:
Q: A 10 kVA, 2400/240 V, 60 Hz single phase transformer has Z, = 5.2 + j12.5 ohms and Z2 = 0.06 + j0.12…
A: In this question, We need to calculate the load voltage if Primary voltage and frequency is rated.…
Q: (b) A single-phase transformer, with primary turns of 500, is delivering full-load of 80 kW at a…
A: Disclaimer: Since you have asked multipart questions, we will solve the first three subpart for…
Q: If the open circuit voltage is 239V and the full load voltage is 205V, then the percentage…
A: Voltage Regulation is nothing but ratio of drop in voltage from no load to full load to full load…
Q: If the open circuit voltage is 225V and the full load voltage is 200V, then the percentage…
A:
Q: The efficiency of a 20 kVA 15.4 / 0.4 kV three-phase power transformer is 79.1% for a load with unit…
A: Given: For a 20 kVA, 15.4/0.4 kV, 3-phase star-delta transformer, Relative idle or no-load %I0=30,…
Q: (a) A 220 / 400V, 13KVA, 50Hz single phase transformer has at full load, a copper load of 140W. If…
A:
Q: A 2,300/240-V, 60-Hz, 4.6-kVA transformer isdesigned to have an induced emf of 2.5 V/turn.Assuming…
A: The given transformer is a step-up transformer. a. The numbers of high-side turns are calculated as…
Q: the peak magnetizing flux, Φmax in the transformer. ii. What is the turns ratio of the transformer?
A: Given Data:Vp = Primary induced voltage/supplyvoltage = 220Vf = Frequency f = 50HzPf =…
Q: Given a transformer (single-phase, 10kVA, 2400/240V, 60Hz) Z1 = 5.2 + j12.5 ohms; Z2 = 0.06 + j0.12…
A: In this question we need to find a load voltage of transformer for given condition.
Q: Consider Figure 1 of the text. For an ideal phase-shifting transformer, the impedance is unchanged…
A: Whenever the impedance is seen from the other side of the transformer it is given as:
Q: 3.57 A two-winding single-phase transformer rated 60 kVA, 240/1200 V, 60 Hz, has an efficiency of…
A: Transformer : A transformer is a stationary device that transmits electrical energy from one circuit…
Q: 2. A 3-phase, 6,600/415-V, 2,000-kVA transformer has a per unit resistance of 0.02 and a per unit…
A:
Q: Using the parameters from the Typical Transformer Values Sheet for a 12.4kV/600V, 100 kVA…
A:
Q: 9- An 11,000/230-V, 150-kVA, 50-Hz, 1-phase transformer has a core loss of 1.4 kW and full-load Cu…
A: Given, Full load KVA, Sfl=150 kVA Core loss, Pi=1.4 kW Full load Copper loss, Pcu=1.6 kW Power…
Q: transformer (A) having a rating of 2000 KVA is connected in parallel with transformer (B) with 4000…
A:
Q: Explain the importance of transformer and basic insulation level in the distribution system. Justify…
A: The detailed answer to the given question is solved below according to the given parameters and…
Q: (a) A 5 MVA 230/10.5-kV single-phase power transformer has a per-unit resistance of 1.5% and a…
A:
Q: A 100-kVA, 4800-480-V, 60-Hz, single-phhase distributión has 6 V/turn and an equivalent impedance…
A: Given data: Impedance referred to the high side : 8.48 Ω Output power required: 50 KVA Primary…
Q: A single-phase 100-kVA, 2,400/240 V, 60-Hz distribution transformer is used as a step-down…
A: As per the guidelines, the first 3 sub-parts have been solved. (a). The value of the turns ratio…
Q: QI An 11,000/230-V, 150-kVA, 50-Hz, 1-phase transformer has a core loss of 1.4 kW and full-load…
A: Given data: Core loss = 1.4 kW Full load Copper loss= 1.6 kW Full load KVA =150 Power factor…
Q: A single - phase transformer rated 60 KVA in connected to 400/235 VA 5HZ supply, has an efficiency…
A: Given Data: No load voltage = 235 V Full load voltage = 200 V
Q: The per-unit system calculations method allows to: Select one: O a. eliminate the need for explicit…
A: Most of human energy requirement is meet by generating electrical energy. Once electrical energy is…
Q: 8.(a) A 100 KVA, 50 Hz, 440/11000 V, 1-phase transformer has an efficiency of 98.5% when supplying…
A: Let Pi → Iron losses Pl4→Full load copper losses At full load , 0.8 Power factor efficiency=98.5…
Q: Consider a single phase transformer of rating 150 KVA, 1500/150, 50 Hz. Let the series resistance…
A: Given: Z1=R1+jX1=0.2+j0.45 ΩZ2=R2+jX2=0.002+j0.0045 ΩKVA=150
Q: The required no-load voltage ratio in a 150 kVA single-phase 50 Hz core-type, two-winding…
A:
Q: 1. A 40-MVA, 20/400 kV, single-phase transformer has the following series impedances: ZLV = 0.9 +…
A: Introduction: An equivalent Transformer Circuit is an explanation of the transformer's behavior by…
Q: A 5 kVA, 50 Hz single phase transformer has ratio 200/400V. The data taken on the LV side at rated…
A:
Q: A 400/100 V, 5 kVA single-phase two winding transformer is to be used as an auto-transformer to…
A: It is given that: two winding transformer:400/100 Vcosϕ=0.8 laggingη=0.95 %Auto transformer:500/400
Q: The information shown in the table below was obtained when a 60-VA, 120/208 V, 60 Hz transformer was…
A: Given, Power Rating = 60 VA Voltage ratings of the transformer 120/208 V Core loss components from…
Q: Q/ The efficiency of a 400-kVA, single-phase, 60-Hz transformer is 98.77% when delivering full-load…
A:
Q: A 500 kVA, 3-Phase ,11 kV / 430 V distribution transformer with the equivalent percent resistance…
A: Given, Three Phase Transformer Voltage Rating= 11 KV/ 430V Output power= 500 KVA Equivalent…
Q: A 2.4-kVA, 2400/240-V, 50-Hz, step-down transformer has the following parameters: R, = 1.5 a, X, =…
A:
Q: A 600 kVA, 1-ph transformer has an efficiency of 92 % both at full- oad and half-load at unity power…
A:
Q: A 15 kVA, 2300/230 volt transformer is under test. With the low side supplied with rated voltage and…
A:
Q: A 1-phase transformer, 12 kVA, 600/200V, 50Hz, Short-circuit (high voltage data): 120V, 20A and…
A:
Q: A 400-turns auto transformer, operating in the step-down mode with 25 percent tap supplies a 4.8…
A:
Q: A 30-kVA, 8000/230-V distribution transformer has impedance referred to the primary of 20 + j100 N.…
A: We are authorized to answer one part of the question at a time since you have not mentioned which…
Q: A 600 kVA, 1-phase transformer has an efficiency of 92 % both at full-load and half- load at unity…
A: Given, Output kVA rating = 600 kVA Efficiency, η=92 % (both at full-load and half-load) Power…
Q: A 200 – kVA transformer with impedance of 5 percent and the power factor of the load is 85 percent.…
A: Given, A transformer with KVA rating, S=200 kVA Impedance, Z=5% Power factor, cosϕ=85%=0.85 Primary…
Q: ABB company manufactures 44 kVA, 2200/220 V conventional transformer. Using this transformer, design…
A:
Q: A 50-kVA, 2600/1300-V, single-phase transformer has a core loss of 780 W. The transformer has a high…
A:
Q: A single-phase, 10-kVA, 480/120-V transformer is to be used as an autotransformer tying a 600-V…
A: The base impedance referred to the primary side is determined as: Zb=(480 V)210 KvA=23.04 ohmFor…
Q: Q1 The oil test condition analysis is the ultimate starting point for any HV transformer assessment.…
A:
Q: A 270 kVA transformer has primary and secondary winding resistances of 0.6Ω, and 0.0016Ω…
A: According to question we have to find the efficiency of transformer at full load with the help of…
Q: A 5000-KVA 230/13.8-kV single-phase power transformer has a per-unit resistance of 1 percent and a…
A: In this question we need to find a equivalent circuit referred to LV side of transformer , voltage…
Q: A 240-kVA, 480/4800-V, step-up transformer has the following constants: Rs = 2.5 Ω, Xs = j5.75 Ω, Rp…
A: Given step up Transformer with240 KVA, 480/4800 vRs=2.5 Ω,Xs=j5.75 ΩRp=25 mΩ,Xp=j57.5 ΩThe core…
Q: Calculate the daily efficiency of a single-phase transformer with an output capacity of 350 kVA at…
A: “Since you have posted a question with multiple sub-parts, we will solve first four subparts for…
Q: 302 j722 םרהj 302 The label values of the single-phase transformer whose electrical equivalent…
A: Given: A 20 KVA, 15400 V/240 V, 50 Hz, single-phase transformer has the following equivalent…
Step by step
Solved in 2 steps with 4 images
- Consider two interconnected voltage sources connected by a line of impedance Z=jX, as shown in Figure 2.27. (a) Obtain expressions for P12 and Q12. (b) Determine the maximum power transfer and the condition for it toA single-phase two-winding transformer rated 90MVA,80/120kV is to be connected as an autotransformer rated 80/200kV. Assume that the transformer is ideal. (a) Draw a schematic diagram of the ideal transformer connected as an autotransformer. showing the voltages, currents, and dot notation for polarity. (b) Determine the permissible kVA rating of the autotransformer if the winding currents and voltages are not to exceed the rated values as a two-winding transformer. How much of the kA rating is transferred by magnetic induction?A single-phase 50-kVA,2400/240-volt,60-Hz distribution transformer is used as a step-down transformer at the load end of a 2400-volt feeder whose series impedance is (1.0+j2.0) ohm. The equivalent series impedance of the transformer is (1.0+j2.5) ohms referred to the high-voltage (primary) side. The transformer is delivering rated load at a 0.8 power factor lagging and at a rated secondary voltage. Neglecting the transformer exciting current, determine (a) the voltage at the transformer primary terminals, (b) the voltage at the sending end of the feeder, and (c) the real and reactive power delivered to the sending end of the feeder.
- A 3-phase, wye connected alternator rated at 1600 kVA, 13.5 kV. The effective armature resistance and synchronous reactance are 1.5 ohms and 30 ohms, respectively. What is the percent regulation for a load of 1280 kW at 0.80 leading power factor?a) For the 2-Bus AC system given in Figure (a) find V1 (amplitude and angle). All the values are given in p.u. Note: Mind complex power concept! b) For the HVDC equivalent circuit given in Figure (b) calculate V2. All the values are given in p.u.An AC generator having an internal resistance of 2 ?? is connected to an LCR circuit in series as shown in the figure. If the generator supplies an electromotive force, ? = 282 ??? (100??) volt, calculate:a) the impedance of the circuitb) the rms value of the current in the circuitc) the voltage drop across L, C and R
- A 10-kVA, 2200/400 V, single phase distribution transformer has a primary and secondary winding impedances of 5 + j12 and 0.25 + j0.45 ohms, respectively. Calculate the voltage across the secondary terminals at full load, 90 % power factor lagging, when the primary is supplied with 2200 volts?-) The active and reactive power drawn by the mixer fed from a 230 Vrms, 50 Hz single phase AC network was measured as 600 W and 100 VAR, respectively. According to this information: a) Calculate the apparent power drawn from the network? b) Calculate the current drawn from the network? c) Calculate the cos(a).The effective resistance of a 2200 V, 50 Hz, 440 KVA, 1 -phase alternator is 0.5 ohm. On short-circuit, a field current of 40 A gives the full load current of 200 AS. The electromotive force on open-circuits with same field excitation is 1160 V. Then the synchronous impedance and reactance is _______ ohm and _______ ohm respectively.
- A 15kVA, 440V, single-phase alternator draws a field current of 5A at rated load. With the same field current, the open circuit emf and short-circuit current are 100V and 80A respectively. The ohmic resistance of the armature between terminals is 0.12 ohm. The ratio of effective to ohmic resistance maybe taken as 1.1. Determine the voltage regulation (in %) when the load is purely resistive.The following data were obtained from a short-circuit test performed upon a 50 kVA, 2300/115 V, 60 Hz transformer: Esc = 87 V, Isc = 21.75 A, Psc = 590 W. Calculate (a) equivalent resistance, reactance and impedance referred to the primary, and (b) voltage regulation at a power factor of 0.866 lagging. Subject: Electrical Apparatus and DevicesHow to generate 480V three phase 400Hz ac from 230V three phase 60Hz ac source? (Please specify the power components you pick, such as transformers, dc-dc converter, dc-ac converter and/or ac-dc converter, how these components are connected and the key parameters of these components, such as the turns ratio of transformer and the duty cycle functions for the converters.)