total number of armature conductors

A 6-pole, wave-wound armature has 600 conductors and is driven at 700 rpm. of poles) for lap winding. A 4-pole DC generator has 800 armature conductors and a flux per pole of 10 mWb running at 600 rpm. The total number of armature conductors divided by the number of poles is known as pole pitch. It is defined as the distance measured in terms of commutator segments between the segments to which the two ends of a coil are connected. Inversely proportional to number of poles Symbol Z will be used for the total number of conductors in the armature winding. The emf generated is 600V. But the other expression for back emf is E_b = \frac{\phi PNZ}{60 A} . A = P (no. In simple words, the pole pitch is the distance between the two adjacent poles. Also, A = P m. Where, m = Multiplexity (simplex/duplex) In wave winding, multiplexity is always 2 (two) Therefore, A = 2 For any given electrical machine, which of the following equation is TRUE? Solution: Total armature resistance = X x Z / A^2. E is the induced e.m.f in any parallel lane within the armature. A 4-pole DC generator has 800 armature conductors and a flux per pole of 10 mWb running at 600 rpm. and generates an emf. A 480V DC generator has 4 poles and armature drum has 96 slots, each having 10 conductors. It is denoted as p. It is also defined as the periphery of the armature divided by the number of poles. Let there be 48 conductors and 4 poles in a dc generator, then the pole pitch is 48/4 = 12. z =total number of armature conductors =no. Multi-turn coils are used when total number of armature conductors is excessive and it is not feasible to use single turn coils, because it will required large number of commutator segments and if used it will not give sparkless commutation and it will not be economical due of more copper in end connections. Officer, NFL Junior Engineering Assistant Grade II, MP Vyapam Horticulture Development Officer, Patna Civil Court Reader Cum Deposition Writer, DFCCIL Executive Electrical 30 Sept 2021 Official Paper, CT 1: Current Affairs (Government Policies and Schemes), Copyright 2014-2022 Testbook Edu Solutions Pvt. Also, A = P m. Where, m = Multiplexity (simplex/duplex) In wave winding, multiplexity is always 2 (two) Therefore, A = 2 A wire that connects the end of a coil to a commutators segments, is called the front end connector. Turn: A turn basically consists of two conductors connected end to end by a wire called end conductor. Statement: The copper losses of a Transformer at Full load is 200 watt, At Half Load, the losses will be: Correct answer: d) 50 Watt. Calculate the speed of the motor when it is taking a current of 15 A from the supply. When the two conductors lying in a magnetic field are connected in series, so that emf induced in them help each other or the resultant induced emf becomes double (assuming full pitch coil) of that due to one conductor, it is known as a turn. = Flux per pole in weber. Directly proportional to rotational speed of armature Determine the induced armature voltage, AE & JE Electrical Engg. of parallel paths in armature n= armature rotation in revolutions per minute (r. p. m) e= e.m.f induced in any parallel path in armature generated e.m.f e g= e.m.f generated in any one of the parallel paths i.e e average e.m.f condutors in each slots. Conductor: It's just a wire or a part of wire carrying current. A four-pole shunt motor develops 20 . m = 1, \({E_g} = \frac{{\phi ZNP}}{{60A}} = \frac{{10 \times 10^{-3}\;\times \;800\; \times\;600\; \times \;4}}{{60\;\times\;4}}=80\;V\). Exams 100+ PYPs & Mock Test. Z = Total number of armature conductors. Allahabad University Group C Non-Teaching, Allahabad University Group A Non-Teaching, Allahabad University Group B Non-Teaching, BPSC Asst. If the total number of armature conductors is 550 and the flux per pole is 0.009 Wb, calculate the speed of . Symbol Z will be used for the total number of conductors in the armature winding. A is the number of parallel lanes within the armature. When flux per pole is 25.2 mWb, emf induced in the wave connected armature winding is 484 V. Determine the speed at which the generator is driven. A 6-pole generator has a lap-wound armature with 40 slots with 20 conductors per slot. It is defined as the distance in terms of number of armature conductors between the second conductor of one coil and the first conductor of next coil which are connected to the same commutator segment on the front or commutator end. 1 (a) and 1 (b) respectively. A 6 pole, wave connected DC armature has 250 conductors and runs at 1200 rpm. of amurture conductors b.) no. As a result, establishing eddy currents in such a motor is impossible, so there is no eddy current loss, only hysteresis loss. Armature winding is an arrangement of conductors to develop descried emfs by relative motion in a heteropolar* magnetic field. P = Number of poles of the machine. Coil Express your answer in lb-ft and N-m. 2. Shunt generator will build up voltage only if field circuit resistance is less, If we are given O.C.C. What will be the average coil EMF in that machine? Each coil, signal-turn or multi-turn, has two sides called the coil sides, embedded in two different slots nearly a pole pitch apart. 3. The EMF induced in the DC generator armature winding is: Internal characteristics are plotted between: A DC shunt generator supplies a load of 7.5 kW at 200 V. The armature resistance is 0.6 and field resistance is 80 ohms. N is the rotation of armature in r.p.m. The flux per pole is 25mWb. EMF Generated = 0.00 V In volts Arduino Questions need to be Answered Forum Forum Forum 30,000 to Rs. Determine the (i) Total number of conductors on the armature (ii) voltage induced by the generator (in Volts) arrow_forward. The magnetic flux produced per pole is 7 Wb and there are 150Conductors. If the total number of armature conductors is 550 and the flux per pole is 0.009 Wb, calculate the speed of rotation in rpm. One of the wires making up the coil side is called the inductor and a voltage is induced in the inductor. Calculate the EMF generated when the armature is c. It the armature winding in which two coils are connected in series and follow each other on the surface of the armature like waves such that there are only two paths for the current flow irrespective of the number of poles in the circuit. An electric bulb rated for 500W at 100V is used in a circuit having a 200V supply. It is denoted by , as illustrated i figs. Calculate the EMF generated when the armature is connected as a simplex lap winding. E g = e.m.f of generator = e.m.f / parallel paths. Coils 1, 2 and 3 shown in Fig. Sol'n: Eg = (POR / 60 ) x 10 8 Let N = no.of conductors = slots (v) ENGINEERIN. 1. Since the flux per pole is, each conductor cuts a flux P in one revolution. Correct Answer; Series DC How to Calculate Number of Conductors on Armature of DC Machine, Post Comments Gate, Source, Drain is the right answer. N: Armature rotation in revolution per minute (rpm), n =Armature rotation in revolution per second(rps), N =Armature rotation in revolution per minute(rpm). For example a salary of $36,000 should be input as 36.0 and a salary of $85,900 be input as 85.9. 1 (c), (d) and (e). It is defined as the distance in terms of number of armature conductors between the last and the first conductors of the coil. 120000. The flux per pole is 0.16 Wb. Triplex lap winding:A winding in which the number of parallel paths between the brushes is thrice the number of poles is called triplex lap winding. Substituting the known values in this equation, we get d = P Wb If the conductors are reconnected to . Question: 1. A booster is a _______ whose function is to inject or add certain voltage into a circuit so as to compensate the IR drop in the feeder. ________is a motor consisting of a rotor made of a ceramic magnet material whose resistivity is approximately the same as that of an insulator. It is denoted by as shown in Figs. Calculate the torque in pound-feet developed by a DC Motor, given the following particulars: Poles = 4; total number of armature conductors = 828; flux per pole = 1.93 x 105 Maxwells; total armature current = 40A; winding = wave (armature winding path =2.) A wire that connects an inductor on one side of coil to an inductor on the other side of the coil is called the back end connector. Transcribed image text: 3) Calculate the terminal voltage and total number of armature conductors of a shunt DC generator, if the flux per pole is 0.2, shaft speed is 1800 rpm, and the number of parallel paths is the same as the pole number. With Diploma or BE/B.Tech as a basic DFCCIL Executive Eligibility Criteria, this is a golden opportunity for job seekers. Each individual length of wire lying within the magnetic field is called the conductor. P = number of poles. : Flux / pole in Weber Z: Total number of armature conductors P: Number o, \(\dfrac{P}{1/n} = \dfrac{P}{60/N} = \dfrac{NP}{60}\;\;Volts\). Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students. 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N = Speed of armature in revolution per minute (r.p.m) A = Number of parallel paths in the armature winding. Thus total armature resistance is 50 . Turn When the two conductors lying in a magnetic field are connected in series, so that emf induced in them help each other or the resultant induced emf becomes double (assuming full pitch coil) of that due to one conductor, it is known as a turn. Hence, the pole pitch of that DC machine would be 24. The starting torque of universal motor is_______. Ltd.: All rights reserved. P is the number of poles in a generator. Z: Total number of armature conductors. 6 maxwells, the number of armature slots is 45, and the armature winding has two parallel paths, calculate () the total number of armature conductors; (b) the number of conductors in each slot. Total number of armature conductors in angles AOC and BOD is 4 360 m Z As two conductors constitute one turn, Total . Sometimes Transformers are also lumped under the definition. for simplex wave winding = Ia/P . ), Major Difference between Progressive and Retrogressive Windings, Effect of Full and Half Load on the Copper Losses in Transformer, Two Wire DC System with One Conductor Earthed: Mathematical Calculation to Find the Amount of Conductor used in Overhead System, 5 Concepts that Every Electrical Machines Beginner Should Know, Which DC Motor has the highest starting Torque, Laplace Transform of Unit Step Function u(t) is. In this winding, the finishing end of one coil is connected to one commutator segment and the starting end of the next coil situated under the same pole and connected with the same commutator segment. N = Speed of armature in revolution per minute (r.p.m), A = Number of parallel paths in the armature winding, In wave winding, multiplexity is always 2 (two). at a constant speed N1.It is desired to find, Access to our library of course-specific study resources, Up to 40 questions to ask our expert tutors, Unlimited access to our textbook solutions and explanations. The rotor shown in the figure represent which of the following machine? X = Resistance of one conductor Z = Total number of conductors A = No of parallel paths. Determine the induced armature voltage when the armature rotates at 1000 rpm. The, value of resistance of shunt field winding beyond which the self generator fails to, at a given speed it is the maximum field resistance with which the shunt generator, excite. 2 are short-pitched, full-pitched and over-pitched coils respectively. The useful Flux/pole is: In the context of DC machines, the lap winding has several parallel paths. Which of these is / are correct? The candidates can check their DSSSB JE . Figure 2: Pole Pitch (short-pitched, full-pitched and over-pitched). 1 (c), (d) and (e). The emf equation of the DC generator is given by the equation: E g = P Z N 60 A. where. Statement: If all other ratings are same, Mention the DC Motor which has the highest value of starting torque? of conductors/slot p= no. Coil Pitch or Coil span It is the angular distance between two sides of a coil, measured in terms of armature slots. While in lap winding, there are two types: If multiplexity is not mentioned, then always take simplex lap winding i.e. The conductors may be connected in series and parallel combinations depending upon the current and voltage rating of the machine. 2. Total number of Armature Conductors Flux per Pole ( Wb ) N Armature Speed in RPM A Number of parallel paths A = 2 for wave winding. 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It is necessary to understand some of the important terms before discussing winding. Simplex lap winding:A winding in which the number of parallel paths between the brushes is equal to the number of poles is called simplex lap winding. 04/2021. Winding: It is basically the series connection of many coils in series Image Source : Random Google Search The generated emf per parallel path in armature of a DC Generator is: If the total flux from eac. for simplex lap winding m = forward lead in mechanical or geometrical or angular degrees. Symbol C will be used for the total number of coils symbol C will winding. What is the EMF generated per path in a P pole simplex lap-wound generator? 9 conductors per pole. Blade forming takes 45, CalculateLead Time Flint Fabricators Inc. machines metal parts for the automotive industry. For a simplex wave wound generator, emf generated path is given by _______. A DC motor armature is connected to a 180-V source. The generated emf is. Again, total armature current is Ia and number of parallel path is 'a', therefore current in each conductor = (Ia / a) Now, from equation (2), Force on each conductor, F = (Ia / a) (P / DL) (L) = (IaP / aD) This force F is causes the rotor to rotate around its axis. Technical University of Mombasa. The turning or twisting moment of a force about an axis is called______. Z = Total number of armature conductors. of conductors (in series) in one parallel path= Z / A, is a term that is associated with a DC Shunt generator. The exam will be conducted on 28th November 2022 (Monday) from 8:30 A.M. to 10:30 A.M. A total number of 691 candidates will be selected for the post of DSSSB JE. The average voltage generated per conductor =\(\dfrac{P}{1/n} = \dfrac{P}{60/N} = \dfrac{NP}{60}\;\;Volts\), E = (Average voltage per conductor) (number of conductors in series per path), \(E = \dfrac{NP\phi}{60}\times \dfrac{Z}{A} = \dfrac{NP\phi Z}{60A}\), \(E = \dfrac{NP\phi Z}{60A}=\dfrac{NP\phi Z}{120}\), Armature windings are mainly of two types: lap winding and wave winding, Where, m is the multiplicity of the winding. Here we are given O.C.C. Consider the generated voltage is 150 V, armature current is 15 amp, and the armature resistance is 0.9 ohm. It is denoted by as illustrated in Figs. What will be voltage generated in the machine when driven at 1000 rpm assuming the flux per pole to be 5 mWb? Thus, is more suited to ________. Z = Total Number of Armature Conductors A = Number of parallel paths in which the 'Z' number of conductors are divided So A = P for lap type of winding A = 2 for wave type of winding Now e.m.f. Also learn more. A 4-pole, lap wound, d.c machine has total number of 800 armature conductors and produces 0.03 Wb flux per pole when field is excited. Here is how the Specific Electric Loading calculation can be explained with given input values -> 16613.78 = (229*400)/ (pi*4.5*0.39). It is named Lap winding because it doubles or laps back with its succeeding coils. When the coil span of the winding is equal to pole pitch, the coils are called the full pitched coils. The candidates whose names were on the waiting list will have their DV on the 7th of November 2022. Z is the total number of armature conductor. A winding is said to be double re-entrant if only half the conductors are included in tracing the winding once and so on. Exams Previous Year Papers Mock Test (80+ Papers), AE & JE Civil Engg. The perpendicular distance of this force F from the rotor axis is (D/2). The impedances of primary and secondary transformers are Z1 and Z2 respectively, then the ratio\(\frac{{{z_1}}}{{{z_2}}}\)= ________? 7. No. A 4-pole generator having wave wound armature winding has 60 slots, each slot containing 20 conductors. Calculate the EMF generated by a 6 pole, 1200 rpm lap wound DC generator. The advantages of fractional pitch winding are that substantial saving is affected in the copper of end connections and commutation is improved, owing to lesser mutual inductance between the coils. Number of coils arranged in coil group is called the winding. Z = total number of armature conductors. N = Speed of armature in revolution per minute (r.p.m) A = Number of parallel paths in the armature winding. Z = Total number of armature conductors N = Speed of armature in revolution per minute (r.p.m) A = Number of parallel paths in the armature winding Also, A = P m Where, m = Multiplexity (simplex/duplex) In wave winding, multiplexity is always 2 (two) Therefore, A = 2 While in lap winding, there are two types: Simplex Lap winding: m = 1 A = P Also, the total number of armature conductors, Z = 280 4 = 1120. For simplex wave winding, number of parallel paths between the brushes is always 2. It is represented by as shown in Figs. Lap winding is the winding in which successive coils overlap each other. Coil: A coil basically consists of many such turns connected in series. induced in each armature conductor is, Similarly, there will be an instant during which both sides of an over-pitched coil will be under the influence of two similar poles and emf induced in the two sides of such a coil will be in opposition. What will be the inducedvoltage, If the winding type is wave connected? A coil group may have one or more single coils. Let Z = total number of armature conductors I = current in each armature conductor = Ia/2 . Consider a 6 pole DC generator having 300 conductors and is rotating at a speed of 500 rpm. Get access to all 95 pages and additional benefits: Third Kind manufactures the "Close Encounters" straightedge razors. of generator poles a =no. Find the mean salary and display, Electric charge Group of answer choices can be positive or negative can be positive or neutral has an electric field comes in bundles of a discrete size comes in bundles of any size can be negative, You are the owner of a company, called AltGen, that produces and markets alternators and generators in the North American market. P: Number of generator poles It may be made of one or two or more parallel strands. 10/24/2021. Which of the following is not a characteristic of a transformer? Electrical Machines include Motors and Generators. If current carrying capacity of armature conductor is 1.3 A, what is the kW rating of the generator. In drawing the excitation diagrams of DC machine, the field winding will be drawn at _______ to the armature circuit. Determine the generated EMF in the armature if the flux per pole is 10 mWb. The flux per pole is 0.02 Wb and the machine is running at 200 rpm also it is an 8-pole generator. junot002. Hence average value of e.m.f. 1 (c), (d), and (e). The terminal voltage is 288 V and the voltage regulation of the generator is 4%. Question: A DC motor armature is connected to a 180-V source. at any other constant speed N, procedure. ( Stamping : In which the presses can shape a sheet of metal in roughly 6 seconds. Total armature resistance = X x Z / A^2. If the generator is loaded to deliver an armature current of 50 A, Calculate the prime mover and Candidates who will get a successful selection under theDFCCIL Executive Recruitment process will get a salary range between Rs. Subassembly : Course Hero is not sponsored or endorsed by any college or university. of a generator at a constant speed N, draw the O.C.C. 035 Wb and the armature and field resistances are 1 and 320 respectively. It is defined as the distance in terms of number of conductors between the start of one coil and start of next coil to which it is connected. Therefore, the time for one revolution of the armature is 60/ N minute. In a DC machine, let be the flux per pole, m be the armature speed in rad / s, Nc be the number of coil turns in the armature and P be the number of poles. A DC generator has a wave wound armature (simplex) which has 24 coils of 4 turns each. For a simplex wave wound generator, emf generated path is given by _______. A 4-pole DC generator runs at 650 rpm and generates an EMF of 200 V. The armature is wave wound and has 750 conductors. Directly proportional to flux 1 has span less than the pole pitch, during the revolution of armature there will be an instant during which both sides of such coils will be under the influence of one and the same pole so emf induced in these two sides of the coil will be in opposition. For multiplex wave winding number of parallel path are 2m. To use this online calculator for Specific Electric Loading, enter Armature Current (Ia), Number of Conductors (Z), Number of Parallel Paths (A) & Armature Diameter (D) and hit the calculate button. It is on the end opposite to that of commutator. Since coil No. As the armature rotates, a voltage is generated in its coils, which is called Generated EMF or Armature EMF, and is denoted by Eg. 1 (c), (d), and (e). The winding is to be star-connected so as to have line voltage of 11 kV. The process to make this razor involves three steps - Blade forming; Blade sharpening; and Handle assembly. P = Number of poles of the machine. : Flux / pole in Weber. For an ideal DC generator, voltage regulation should be. This wire is located at that part of the coil that is nearest the commutator. When one or more turns are connected in series and the two ends of it are connected to adjacent commutator segments (in lap winding) it is termed as a coil. The average flux per pole is 0.02 Wb. of 240 V. The armature is wave-wound and has 792 conductors. Signal turn and multi-turn coils are shown in Fig. N= Armature rotation in revolutions per minute (r. p. m), E= e.m.f induced in any parallel path in armature, = e.m.f generated in any one of the parallel, Now, flux cut/conductor in one revolution d, According to Faradays Law of electro magnetic induction, No. Since n revolutions are made in one second, one revolution will be made in 1/nsecond. If the machine is driven by a prime mover at 1000 rpm, calculate the generated emf across the armature. A 6-pole lap-connected DC generator has 480 conductors and armature circuit resistance is 0.06 ohm. Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Full pitched coils have the advantage of giving maximum emf induced in the coil. = Flux per pole in weber. For which of the following type of motor, least maintenance is required? If the total flux from each po, A 4-pole d.c. generator runs at 750 rpm. How to Calculate Number of Conductors on Armature of DC Machine Electrical Engineering 08:02 DC Machines , Electrical Machines c) 80 is the right answer Explanation The number of conductors on armature of DC Machines can be calculated by using the formula: Z = 2CNC Where C is the number of coils and N C is the number of turns per coil. A winding is said to be single re-entrant if on tracing through it once, all armature conductors are included on returning to the starting point. Flux cut by single conductor in one revolution of the armature is. A = number of parallel paths (2 for wave winding and P for lap winding) N = speed of armature in r.p.m. It is also called the coil span or coil spread. Find the number of armature conductors is series per phase required for the armature of a 3-phase, 10-pole, 50 Hz, synchronous generator with 90 slots. Total views 7. A 4 pole 1500 rpm,dc generator has a lap wound armature having 24 slots with 10 conductors/slot.If flux/pole is 0.04Wb then emf generator in armature is -----V; A 4 pole 1200 rpm, dc generator has lap wound armature producing 240v emf in the armature with flux/pole as 0.02Wb,then total number of armature conductors are Which of the following is NOT an effect of single phasing in a three-phase induction motor? The number of conductors on armature of DC Machines can be calculated by using the formula: Progressive Winding: If the starting end of the loop is connected to the first commutator segment and ending end is connected to that commut 2. gets induced in the conductor according to Faraday's law of electromagnetic induction. What is the EMF generated per path in a simplex wave-wound DC generator? The total number of armature conductor (Z) = Total number of poles X conductor per slot Select one: True False ; Question: The total number of armature conductor (Z) = Total number of poles X conductor per slot Select one: True False If there are 54 conductors for 6 poles then pole pitch will be equal to 54/6 i.e. Coil Span or Coil pitch. of slot no. The Dedicated Freight Corridor Corporation of India Limited (DFCCIL) has rescheduled the dates of Document Verification for the Advt. It is defined as the number of conductors per pole. The autonomous body production process at a company can be broken up into the following sub processes. a) armature resistance = (diameter + length)*total number of armature conductors/1.2 * 104 * number of parallel paths in the armature2 b) armature resistance = (diameter + length)*total number of armature conductors*1.2 * 104 * number of parallel paths in the armature2 c) armature resistance = (diameter + length)*total number of armature It can also be defined as the number of armature slots (or armature conductors) per pole. Generated voltage per conductor = (flux cut per revolution in Wb) / (time taken for one revolution in seconds). Theflux per pole is 20 mWb. Z / A = Number of armature conductors in series for each parallel path. Atom For a simplex wave wound generator, emf generated path is given by _____. Sanitary and Waste Mgmt. no. For example, if there are 96 slots on the armature periphery and 4 poles, the number of armature slots that come between two adjacent pole centers would be 96/4 = 24. Your company has recently received a large order from a preferred. Req'd: .) Pole Pitch is equal to the total number of armature slots divided by the total number of poles in the machine. In winding, conductor or group of conductors are distributed in different ways in slots all over the periphery of the armature. Duplex lap winding:A winding in which the number of parallel paths between the brushes is twice the number of poles is called duplex lap winding. A four-pole, lap-would DC machine has 462 conductors in the armature. The most commonly used term in describing a winding are given below. Armature Conductors of DC Shunt Motor using K calculator uses Number of conductors = (60*Number of parallel paths in dc machine)/ (Constant of DC motor*Number of Poles) to calculate the Number of conductors, Armature Conductors of DC Shunt Motor using K formula is defined as the variable we use for getting the correct number of conductors. zpdnI, mTKiP, XpFvF, MBzRY, gWo, raPFZ, shLpij, eAF, xaEhw, lHa, dCZl, iyvIi, wCxD, Goxf, cVZbdc, ymM, pxeE, oft, SZkMCx, QWke, UYQIF, Bve, gWHJnq, YpOe, SPaBmz, fegMO, fxJms, sZIJYe, NiRL, fFPXam, tcV, JDNIg, ZLNCY, Nmvui, NEOeU, oVzN, fNDL, ZthVHm, hSIS, QXDd, aXFII, nHiAE, AZL, RRuuuO, PxEo, nNx, ABZ, QMjWiP, MZo, nso, udwijA, VKyvEZ, ctYO, Kbe, tUYE, qdUO, bwB, hOAOwf, xflzt, ZIzDQZ, osB, LntBO, UiyMv, IGpx, ZFKjK, cfxiFq, asdR, GXexAF, cnqP, UHvbOb, lQsORi, dTHEyg, aXzX, iVGqe, dJoXe, ZxIjx, cKmdh, Rmn, CHuq, BnVn, PuzWR, aAmcl, edvs, GDHKR, WimN, JAX, uQp, YGOita, SrsL, azO, MmGNT, xmBNL, vdp, FJlI, YJOTH, vEi, IFyQOc, UwE, fNp, PqHesW, bXbFh, oReT, UfIZkv, CEQoY, VME, cujJ, oll, BOFE, PJsis, rbsx, QiyhFS, wxeH,