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Why are the readings on a ammeter always different?
The readings on an ammeter indicate the current being drawn by a load in a circuit. This load is basically a resistance to current flow. The higher the resistance, the lower the current. The supply voltage has a direct effect on current flow. The higher the voltage applied, the higher the current will be. So the readings will vary on the ammeter according to fluctuations in load and or resistance of the circuit and the applied voltage.
Why does your electric motor slow down after it builds operating rpm?
The most likely reason for an electric motor to slow down after reaching its operating RPM is due to the increase in mechanical load or friction it experiences. This can be caused by a variety of factors, such as increased resistance in the motor's bearings, increased resistance in the driven load, or inadequate power supply to the motor. To maintain the desired RPM, it may require adjustments to the load or power supply.
What size breaker do you need for a well pump?
A breaker is based on the amperage that is drawn by the pump motor load. Find the full load amperage of the motor. The wire fed from the breaker has to be rated at 125% of the motors full load amperage. The breaker for motors have to be over sized, usually 250% of the motors full load amps.
What is locked rotor in three phase induction motor?
A motors locked rotor current is the same as the motors starting current. This is the point where the voltage is applied to a non rotating motor, time cycle zero. Because the motor is not rotation and generating a back EMF to oppose the inrush current, the current will go as high as 6 times the running current of the motor.
How many watts per outlet?
No way of telling unless you know the current of all devices that use the circuit. The maximum wattage for the circuit, assuming a resistive load (no motors) would be: Watts = Volts x Current.
What type of ac motor will operate at a constant speed from no load to full load?
The Synchronous motors will operate at a constant speed from noload to fullload. Even it is classified as an AC motor, we have to fed the motor both AC and DC supplies. That we have to supply DC to the Field (Normally Rotor) and AC to the Armature (Normally Stator).
How will star and delta configured three phase induction motors perform as load increases?
Motors with star delta starter, starts with star mode, avoiding inrush of current for a relatively higher starting load, as the speed picks up, it goes to Delta mode with full phase voltage applied across the winding and continues to cater to the designed load.
DifferEnces of long vs short shunt DC COMPOUND MOTORS?
the basic difference is ,in short shunt motor the series field winding wont carry any current under no load condition whereas in long shunt motors series winding will carry no load current.....
Why are the readings on a ammeter always different?
The readings on an ammeter indicate the current being drawn by a load in a circuit. This load is basically a resistance to current flow. The higher the resistance, the lower the current. The supply voltage has a direct effect on current flow. The higher the voltage applied, the higher the current will be. So the readings will vary on the ammeter according to fluctuations in load and or resistance of the circuit and the applied voltage.
What is AC23?
Alternating Current for highly inductive load i.e. motors...whereas AC21 is for resistive load....i.e. heating elements. this is what you called utilization category...
Do higher watt inverters drain batteries more than lower watt?
The inverter draws little current on its own. It is the load that is connected to the inverter. If there were no load on the inverter you could use an ampmeter to determine the no load current. One thing to consider is that a higher wattage inverter would have larger gauge wire which is of lower resistance. This could make the no load current lower for the higher wattage inverter. Bottom line is you would have to measure or have a specification on the no load current.
High voltage will trip a circuit breaker?
A higher voltage means that a higher current will flow in the same load. It is the current that causes the breaker to trip.
How do you calculate mcb rating?
Circuit breakers are used to protect the conductor that is connected to it. The sizing of the conductor is based on the current of the load. As the connected load current is increased so must the wire size to accommodate that higher current. Therefore as the wire size increases so must the breaker size to accommodate the higher load current.
How can you solve the problems of blown of fuses or damaged of thyristors on Frequency drive control Downhill Belt Conveyor motors in cement factory?
Recurring fuse blowing or thyristor failure on a conveyor motors only indicate either one or more of the following reasons : 1. Fuse or VFD is of lower rating, by design (wrongly) 2. Actual load has increased more than the designed load resulting into increased load current. 3. Increased load could be due to jammed conveyor, faulty bearing, mis alignment of the conveyor or payload itself is increased over a period. Measure & Check the no load current and load current and cross check with designed load current.
How is the full load current different to the starting current- is the full load current higher or lower than the starting current?
While starting a motor from standstill to its rated speed, the motor has to overcome the inertia and generate enough torque to over come it. In the process the motor takes higher current during the starting. Once started and set in motion the current reduces ti its normal value. Full load current is lower than the starting current normally.
How do you calculate no load current of motor?
On an average, the following assumptions will stand good for an induction motor: * Starting current (Ist) will be 5 times of the Full Load Amps (IFLA) * No Load Amps (INLA) can be any where between 0.3 to 0.5 times of IFLA; To the most, this figure depends upon the frame size of the motor; larger the frame size, smaller will be the INLA. This is also true for the wound rotor type induction motors. Manufacturers normally give two different current figures, one for the motor running with full load, and one for 'locked rotor'. Locked rotor current is the very high current drawn when power has been applied, but the motor has not had time to start spinning. No load current is important since this portion of the energy consumed will not be reflected in the process output, for a machine which is running continuously, no one can neglect whatever low value it is. Usually, the efficiencies will be mentioned and one can apply basic thumb rules to arrive no load current from those figures Manufacturers don't usually publish 'current at no load' for their motors. Since a motor with no load is not doing anything useful, no one really cares how much current is being drawn. It's kind of like putting your car up on a jack so the wheels are off the ground and asking how much fuel will the car burn sitting still with the wheels turning at 10 miles an hour - or at 100 miles per hour - who cares? !!!
Why does your electric motor slow down after it builds operating rpm?
The most likely reason for an electric motor to slow down after reaching its operating RPM is due to the increase in mechanical load or friction it experiences. This can be caused by a variety of factors, such as increased resistance in the motor's bearings, increased resistance in the driven load, or inadequate power supply to the motor. To maintain the desired RPM, it may require adjustments to the load or power supply.
