A 10 MVA, 11 KV, 3-phase star-connected alternator is protected by the Merz-Price balance-current system, which operates when the out-of-balance current exceeds 20% of full-load current. Determine what portion of the alternating winding is unprotected if the star point is earthed through a resistance of 9Ω. The reactance of the alternator is 2Ω.

Q: A 400V, 3-phase star connected alternator supplies a delta-connected load, each phase of which has a…

A: Ans (a)

Q: 2. A three-phase alternator has a rating of 5000 kVA at 13.2 kV. Calculate the full-load line…

A: Given:  S=5000 KvA V=13.2 KV we know that  S=3×V×I I= Load Current

Q: A 10 MVA.11 KV, 3-Phase star connected alternator is protected By the Merz-price balance current…

A:

Q: From the following test results, determine the voltage regulation of a 346 kVA, 2,000V, 3 phase Y…

A: We have given the Voltage rating=2000 V The emf of 500 V is provided on open-circuit with the field…

Q: phase step-down transformer, 1 1000/ 416 V, D/Y°connection. It takes phase Egúal 30.3A Calculate the…

A:

Q: A four- pole three phase , 50 hz star connected AC generator has 24 stator slots. There are 6…

A: Given frequency, f=50Hz

Q: A 10 Kva, 2400/240-V single-phase transformer has the following resistances and reactances. Find the…

A:

Q: A 3-phase alternator has a rating of 5000kVA at 13200V. Calculate the full-load line current.

A: The term "alternator" comes from the term "alternating current" (AC). Alternators generate AC power…

Q: 6. A 3-phase, star-connected alternator has a resistance of 0.52/phase and a synchronous reactance…

A: R=0.5 Ω/phaseXs=5 Ω/phaseEf=6600 VI=130 A Find: Vt=?VR=?

Q: QIFind the no-load phase and line voltage of a star-connected, 4-pole,50 Hz alternator, having flux…

A:

Q: 3. What is the minimum insulation resistance for the windings of a 4330-volt alternator? A. 43.3…

A: The minimum insulation resistance(given in Mega Ohms) for the armature winding or field winding of…

Q: The effective resistance and synchronous reactance of a 110 kVA, 440 V single phase alternator are…

A:

Q: 21.A 37 kVA, 13200/240V 60Hz, single phase transformer has 1% resistance and 3% reactance. Find the…

A:

Q: 4. A 3-phase, star-connected alternator is rated at 1600 KVA, 13500 V. the armature effective…

A:

Q: Two alternators are operating in parallel and sharing a common load. For increasing the load shared…

A: The explanation is as follows.the answer for the question is true.(a)

Q: For the same alternator, the ratio of rated KVA, when connected as 3-phase winding alternator to…

A: During the 3-phase connection, the value of the phase spread will be ϕ=π3 Thus, the value of the…

Q: A 1500kVA, 3phase, 60Hz, 6.9kV, wye-connected alternator has a field resistance of 0.45Ω and an…

A:

Q: The effective resistance and synchronous reactance of a 100 kVA, 440 V single phase alternator are…

A: Let  E= Generated voltage across the synchronous generator V=Terminal voltage across the generator…

Q: A three-phase generator is rated 38 MVA, 16.4 kV. If its reactance is specified as 10%, then the…

A: i have explained in detail

Q: 84. A 2,400/2,200-volt autotransformer delivers a load of 90.5 kw at a power factor of 0.75.…

A:

Q: A 3-phase, 4- Pole, star- connected Alternator is rated at 10 KVA, 420V. The armature resistance is…

A: Given, A 3-phase, 4 pole, star connected alternator, kVA rating, S=10 kVA Supplied line voltage,…

Q: A 3phase 600 kVA alternator has a rated terminal voltage of 3300V (line value). The stator winding…

A:

Q: A 3.phase, star.connected,50HZ alternatorhas 96 conductorsperphase and a flux/pole 0.1 Wb.The…

A: It is given that: Frequency=f=50 HzConductors per phase=Zph=96 Flux/pole=ϕ=0.1Xs=5 Ω/phRL=10…

Q: For the same alternator, the ratio of rated KVA, when connected as 3-phase winding alternator to…

A:

Q: The winding of a 3-phase, 6 pole, 60 cycle alternator has 2/3 pitch. What is the chording angle?

A: Given data ,  No. of pole (P) = 6 Frequency , f = 60Hz Pitch Factor  = 23 pitch

Q: 3. A 30, 25 kV, 500 MVA, 60 Hz alternator has a synchronous reactance X, = 1.5 pu. The alternator is…

A:

Q: A 1,5 MVA, 3.3 kV, 40 pole, three-phase sta connected asytnchronous alternator has reactance of Xd =…

A: Alternator: Electrical Generator is an energy conversion device which converts mechanical energy to…

Q: QIFind the no-load phase and line voltage of a star-connected, 4-pole,50 Hz alternator, having flux…

A:

Q: A three phase star connected alternator of 1000 KVA, and 4600 volts, has an armature resistance of 2…

A:

Q: A 3¢, 27 kVA, 230V, 0.9 PF (lagging) load is supplied by three 1OKVA, 1330 V/ 230 V, 60 Hz…

A: From the given data, Calculating load current, IL=P3VLIL=27×1033×230IL=67.7 A

Q: A 6.6 kV, 6 MVA Y-connected, 3-phase alternator has an effective ac resistance of 0.436 ohms between…

A:

Q: Determine the terminal voltage of a 4-pole, 3-phase alternator that is running at 50 hz. The…

A: Per phase induced emf =  4.44×f×flux×per phase turns× winding factor.

Q: A 50 Hz, 11KV, 3-ph, alternator with earthed neutral has a reactance of 5 Ω\ ph and is connected to…

A:

Q: phase reactance is 1.5 pu. (i) Find the mechanical power delivered by the motor, including all…

A: Given data - synchronous machine Voltage V = 415 volt                                      frequency…

Q: Solve the following question 1.A 3-phase, 16-pole alternator has a star-connected single-layer…

A: Poles P = 16 slots = 144 10 conductors / slot Speed N= 375 RPM flux Ø = 50 mWb Distribution factor…

Q: A 3-phase, 30 MVA, 33 kV alternator has internal reactance of 4% and negligible resistance. Find the…

A:

Q: A three-phase generator is rated 40 MVA, 13.8 kV. If its reactance is specified as 6%, then the…

A: In this question we will find actual importance with given data...

Q: A 3-phase, 10 kVA, 400 V, 50 Hz Y-connected alternator supplies the rated load at 0.8 pf lagging. If…

A:

Q: A 3-0, 50-Hz, star-connected, 2,000 kVA, 2,300-V alternator gives a short-circuit current of 600 A…

A:

Q: A 1000 kVA, 6.6kV, 3-phase, star-connected alternator has a field resistance of 0.50 ohm per phase…

A: Given 3-phase  star connected alternator1000 KVA ,6.6 kvField resistance Rf=0.5 ΩArmature resistance…

Q: A3-phase, star -connected alternator on open circuit is required to generate a line voltage of 3600V…

A:

Q: 3-φ, 50-Hz, star-connected, 2,019 kVA, 2,319-V alternator gives a short-circuit current of 600 A for…

A: rating=2019kva vl=2319v Isc=600A voc=900v Rphase=Rline/2=0.06 ohm

Q: 10. The phase current produced by a certain 240V, Y-connected generator is 12A. The corresponding…

A: QUESTION 1. The phase current produced by a certain 240V, Y-connected generator is 12A. The…

Q: identical, 3-phase, Y-connected alternators A and B share equally a load of 10MW at 33kV at 0.8pf…

A:

Q: Calculate the fuse sizing of the following: (i) 240KVA, 415 V three-phase transformer. (ii) A 230 V,…

A: The solution can be achieved as follows.

Q: "A 120/240 V, 50 Hz transformer operating at no load draws an exciting current of 5 A when the…

A: reactive power = active power * tan(power factor angle) Active power = voltage * current* power…

Q: A 10-kVA, 4800/480-V single-phase transformer has primary and secondary winding parameters of…

A: Given data about a single phase transformer is Rated kVA S=10 kVA. Induced emf ratio is given…

Q: Transitions Animations Slide ShoW 1. A 3- phase, 30 MVA, 33 KV alternator has internal reactance of…

A: In the 3 phase system,  30MVA, 33kV alternator have Reactance 4%. Find the Reactance per phase to…

Q: Find the no-load phase and line voltage of a star connected 3-phase 6 pole alternator which runs at…

A: The data given in the question are: 3-ϕ,6pole, 20rps, ϕ=100mWb, Kd=0.96,Kc=0.98, 54slots, double…