A motor is tripping out on overload. The motor nameplate reveals a FLC 68 amperes. When the motor is operating under load, an ammeter indicates the following : phase #1 =166 ammeters, phase #2=164 ammeters and phase #3=225 ammeters. what is most likely the problem with this motor
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A motor is tripping out on overload. The motor nameplate reveals a FLC 68 amperes. When the motor is operating under load, an ammeter indicates the following : phase #1 =166 ammeters, phase #2=164 ammeters and phase #3=225 ammeters. what is most likely the problem with this motor
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- A motor is tripping out on overload. The motor nameplate reveals a full load current of 68 amperes. When the motor is operating under load, an ammeter indicates the following: Phase # 1=106 Amps, Phase #2=104 Amps, and Phase #3=105 Amps. The motor has been in service for six months. What is most likely the problem? motor winding is bad ambient temperature is too high and the overload needs to be adjusted to account for that overload setting is too low bearing is bad or the load is too heavyYou 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.The nameplate of a single phase motor states that the full load speed is 17,000 rpm. What type of motor is this?
- A motor is tripping out on overload. The motor nameplate reveals a full load current of 68 amperes. When the motor is operating under load, an ammeter indicates the following: Phase # 1=106 Amps, Phase #2=104 Amps, and Phase #3=105 Amps. The motor has been in service for six months. What is most likely the problem?READ THE PROBLEM AND JUST DRAW CIRCUIT DIAGRAM. NO NEED TO SOLVE ANYTHING. A short shunt compound generator delivers 150A at a terminal voltage is 230V.The shunt field current is 2.5A. The resistances of the armature, series field and diverterare 0.032 ohm, 0.015 ohm and 0.03 ohm respectively. Calculate the electrical efficiencyof the generator at this load. Modify the circuit diagram on the picture based on the problem. Answer: 95.7%12. The regulation of a 250-volt shunt generator is 6 per cent. Calculate the no-load voltage.
- 8.a. Which of the following most accurately describes the difference between a contactor and a starter?A. A starter contains a contactor and some additional protective circuitry.B. A starter is always mounted in an enclosure.C. A starter contains reversing contacts.D. A starter is always three-phase while a contactor may be single-phase or three-phase.8.b. The main bus in a motor control center is used toA. reduce the possibility of overload with large loads.B. enclose motors within a protective shield.C. distribute power to all starters in the center.D. reduce the voltage of the plant's supply.In a 50kVA star connected 440 V, Three phase, 60Hz alternator, the effective armature resistance is 0.25 ohm per phase, what is the percentage regulation on full load?SHOW YOUR COMPLETE SOLUTION, ANSWER MUST BE IN 2 DECIMAL PLACES. SHOW WHAT IS GIVEN AND WHAT IS THE UNKNOWN. A 20KW short shunt generator with a terminal voltage of 250V has armature, series and shunt field winding have resistances of 0.05 ohms, 0.03 ohms and 100 ohms respectively. Calculate the total voltage generated in the armature when the brush drop is 1 V per brush and the feeder resistance is 0.5 ohm.
- Six generators are operating in parallel supply a total current of 3500 A. Each machine has a field resistance of 60 ohms and an armature resistance of 0.01 ohm. The emfs generated of these generators are 250, 270 ,280, 290, 300, 310 volts respectively. Find the share of each of the generator.The deep well pump motor is 50 hp, 3-phase, 4-poles, 230 volts, 60 Hz induction motor, operating at 0.90 efficiency, 0.85 power factor and 3 % slip. Determine the current at which the motor is operating. (a). 112.7 A (b). 122.4 A (c). 120. 5 A (d). 124.7 A. A 20 kW compound generator works on full load with terminal voltage of 250 V. The armature, series, and shunt windings have resistances of 0.05-ohm, 0.025 ohm, and 100 ohms, respectively. If the machine is connected short shunt, the emf generated is nearest to. (Our subject is Electrical Machines 1 ) (I need a clear answer and solution. Thank you so much)