Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 34 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 34 - Which NEC table is used to determine the full...Ch. 34 - A 5-HP single-phase motor is connected to 208...Ch. 34 - A 10-HP single-phase motor is connected to 240...Ch. 34 - A 75-HP synchronous motor is connected to a...Ch. 34 - A squirrel-cage induction motor has a nameplate...Ch. 34 - A squirrel-cage motor has a nameplate current...Ch. 34 - A 100-HP three-phase squirrel-cage induction motor...Ch. 34 - A 60-HP synchronous motor is connected to 240...Ch. 34 - Prob. 9RQCh. 34 - Both the motors and the feeder in Question 9 are...
Ch. 34 - A 30-HP squirrel-cage induction motor is connected...Ch. 34 - Refer to the preceding Practical Application. When...Ch. 34 - Refer to the first Practical Application in this...Ch. 34 - A 10-HP single-phase motor is connected to 240...Ch. 34 - A 500-HP synchronous motor is connected to 2300...Ch. 34 - A 30-HP three-phase squirrel-cage induction motor...Ch. 34 - A 75-HP synchronous motor is connected to a...Ch. 34 - Prob. 5PPCh. 34 - A 350-HP squirrel-cage induction motor is...Ch. 34 - Three squirrel-cage motors are connected to a...
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- Full load current for 3-phase, 440 volts, 20 HP induction motor will be closer to (a) 5 A (c) 25 A (b) 15 A (d) 35 Aarrow_forwardIf a dual-voltage split-phase motor is to be operated on high voltage, how are the run windings connected in relation to each other?arrow_forwardYou are an electrician working in an industrial plant. A 30-hp three-phase squirrel-cage motor keeps tripping out on overload. The motor is connected to a 240-volt line. Voltage measurements indicate the following voltages between the different phases: A–B = 276 volts, B–C = 221 volts, and A–C = 267 volts. Determine the percentage of heat rise in the winding with the highest current.arrow_forward
- 14/ What are the following statements are true for a three-phase induction motor? I. Three-phase induction motor stator winding is fed from a three-phase supply II. Stator carries a three-phase winding III. Rotor carries a short circuited winding a. I and II only b. I,II and III c. II and III d. I onlyarrow_forwardA 110 V, 60 Hz, 6 — pole single phase induction motor 1/3 hp has the following equivalent circuit impedances: RI = 1.52 ohm, R2 = 3.13 ohm and xl =2.10 ohm, x2 =1.56 ohm. Xm=58.2 ohm, The friction, windage and stry losses =16W, the core loss = 35 W. For a slip of 0.05, calculate (a) input current, (b) power factor, (c) developed power, (d) output power, (e) speed (f) in put power (g) air gab power (h) T ind (i) T load (j) efficiency.arrow_forwardWhat are the electrical components of a single phase motor?arrow_forward
- 10 What type of supply is given to the stator of the three-phase induction motor? a. Three phase supply b. Two phase supply c. Four phase supply d. Single phase supplyarrow_forwardcan you answer this thankarrow_forwardA 400V, 60HZ, 6-pole wye connected , 30 induction motor draws 75KW with a line current of 100A. The core loss is 2KW, Friction and Windage loss is 1.2KW. The stator resistance between two terminals is 0.352. What is the efficiency if the motor runs at a slip of 2.5%?arrow_forward
- when determining the full load current of three phase motors, what is used to determine that valuearrow_forwardA 150 HP, 3-phase, 6 pole, 460 V, 60 Hz induction motor draws 195 A line current at full load speed of 1170 rpm and 0.85 pf. Solve for the percent slip at full load. (a). 2.5% (b). 3.0% (c). 2.8% (d). 2.0%arrow_forward1.) A 5 hp 3-phase motor draws current when connected to 230 volt. Determine the efficiency of the motor draws 12.5 A and the power factor is 0.9 a. 80 % c. 83.3 % b. 92.3% d. 102.3 % 2.)A three-phase motor commonly used for high stating torque a. WRIM b. SCRIM c. SM d. SPIM 3.)The power stated in the nameplate of a motor is a. Power drawn by the motor c. Power drawn in kilowatt b. Power generated d. Output power of the shaftarrow_forward
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