Home / Questions / Description of Core Loss in synchronous generator When does the loss occur 6 marks b A 3 p...
Description of Core Loss in synchronous generator. When does the loss occur? [6 marks] b) A 3 phase, 2 poles, 4.16 kV, wye-connected synchronous generator with 50 Hz is applied as an emergency power source to supply 500 kW at a power factor of 0.9 lagging. The stator resistance is 0.3 Q/phase. Rotational losses in the machine are estimated to be 15 kW. Determine the required horsepower and torque of the prime mover. [12 marks] c) A 3 phase and wye-connected synchronous generator with the following parameters is considered P 150 MW,v 12.6 kV.f -60H2,( 1800 rpm, PF 0.85 The armature resistance is 1.535 m2 and the field current Ir -700 A. The SCC and OCC tests for measurements of armature current IA and intemal generated voltage EA are described in the Table 1 below: Table 1. OCC and SCC tests 700 800 Es (kv) 5.8 7.89.811.3 12.6 13.5 9.2 A(A) 34 46 5.8 79 809 4.6 If a load is connected to the generator, i. Determine number of poles for the generator's design. [12 marks] 2.(30 marks] a) Description of Core Loss in synchronous generator. When does the loss occur? [6 marks] b) A 3 phase, 2 poles, 4.16 kV, wye-connected synchronous generator with 50 Hz is applied as an emergency power source to supply 500 kW at a power factor of 0.9 lagging. The stator resistance is 0.3 Q/phase. Rotational losses in the machine are estimated to be 15 kW. Determine the required horsepower and torque of the prime mover. [12 marks] c) A 3 phase and wye-connected synchronous generator with the following parameters is considered P 150 MW,v 12.6 kV.f -60H2,( 1800 rpm, PF 0.85 The armature resistance is 1.535 m2 and the field current Ir -700 A. The SCC and OCC tests for measurements of armature current IA and intemal generated voltage EA are described in the Table 1 below: Table 1. OCC and SCC tests 700 800 Es (kv) 5.8 7.89.811.3 12.6 13.5 9.2 A(A) 34 46 5.8 79 809 4.6 If a load is connected to the generator, i. Determine number of poles for the generator's design.
Jul 16 2020 View more View Less
If u = e^x cosy and v = e^x sin y find jacobian of u,v, on x,y >
Aug 05 2020Workers who are illiterate suffer from embarrassment and fear. An HR manager notes, "They will ask for directions many times, even though the instruction manual is alongs...
Jun 02 2020Lawn Master Company, a manufacturer of riding lawn mowers, has a projected income for the coming year as follows:Sales41,000,000Operating expenses:Variable expenses$ 34,8...
Jul 19 2021Determine the area of the region enclosed by y = +4,2 limits of integration and answer to 2 decimal places. = -4, and y = 3. Round your The area of the encloses a region ...
May 14 2021S (1-x²) 3/2 dx X Х
Apr 19 2021he physical sciences have adopted the principles of operationalism as put forward by William Percy Bridgman, recipient of the 1946 Nobel Prize in Physics, in his book The...
Jun 01 2020Sam works as a transcriptionist for $30,000 per year, and Janet works as a jet propulsion specialist for $73,000 per year. Which of the following statements could best ex...
Nov 08 2017Probability Theory – Tea TimePlease help with the following problemTea Time is considering selling juices along with its other productsStates of NatureHigh Sales Med Sal...
Sep 01 2020Three phases of the management process are controlling, planning, and decision making. Match the following descriptions to the proper phase: Phase of management processDe...
May 09 2021Disintegration of wood chips (Fig. 7B.11). In the manufacture of paper pulp the cellulose fibers of wood chips are freed from the lignin binder by heating in alkaline sol...
Aug 06 2020