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For permanent current measurement of large motor amperage's the feeder wires are run through a CT (current transformer) whose output is displayed on a panel mounted amp meter. A clamp on amp meter is a fairly accurate measuring device that measures the current while the motor is in operation. It is a hand held device that clamps around the motor lead that is being tested. A comparison between the clamp on meter and the motor name plate will let you know if the motor is near overload or if it is in an overloaded condition.
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoIt relatively straightforward. Just do it one step at a time. An example...
10 horsepower motor, 480 three phase delta, 0.82 power factor, 0.92 efficiency...
One horsepower is 746 watts, so 10 horsepower is 7460 watts. Divide 7460 by 0.82 to get 9098 VA, and divide by 0.92 again to get 9889 effective VA. Divide by 3 to get 3296 VA per winding. Divide by 480 to get 6.87 amperes per winding. Multiply by 1.732 (square root of 3) to get 11.9 amperes per phase.
Wiki User
∙ 11y agoInsert an ammeter into one of the three line conductors. As a three-phase motor is a balanced load, then the current in each line will be the same value.
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How many amps does a garage door motor use?
about 3 or 4
18kW motor will take how many amps?
53000Amps
How many amps are needed for a 220V well?
It depends on the motor. The motor determines the amperage. Should be written on the well pump itself.
How many amps should a starter draw?
It depends on the size and type of the motor being started.
How many amps does a 12 volt boat trolling motor use per hour?
You asked the wrong question. You need to know how many amps the motor uses. Then you can multiply amps times volts and get watts. Then you can multiply watts by hours and get watt hours. (For house electricity you pay for kilowatt hours.) A kilowatt is 1,000 watts.
How many amps does a garage door motor use?
about 3 or 4
Why does the blower motor not work without pushing or pulling on the ignition key and having the key in just a certain position on a 2005 dodge ram diesel?
Your ignition switch has failed. There is a good chance that the wiring plug for the switch has melted slightly due to a blower motor that is pulling too many amps. You will have to replace the switch, plug, and blower motor.
How many watts in a 115 volt refrigerator?
How many Amps is the fridge pulling? Multiply the Amps by the 120V circuit you're plugging into and you'll get your Watts.
18kW motor will take how many amps?
53000Amps
How many amps are in a twelve volt motor?
That depends entirely upon the type of motor. A car starting motor may take a few hundred Amps for the short period.
How many amps will a 75KW 525v motor draw?
23
How many amps does a 15 hp motor draw?
To answer this question the voltage of the motor must be stated.
How many amps will a 24 volt dc motor draw if running at 12 volts?
Depends on how big the motor is. A stronger motor will draw more amps then a weaker or less efficient motor. For example a wiper motor draws far less then a starter motor.
Why is my single phase induction motor drawing to many amps?
I have a single phase induction motor. It draws 8 amps on start up and climbs to 14-15 amps when I put a load on it. When I don't have a load it runs at 1 and climbs to 2-3 amps. It is normal operation for this motor to run at the lower number of amps with a load. But I don't know what is wrong.
How many amps will a 120 kw dc motor require?
Depends on the voltage.
How many amps drawn a 110KW motor?
Watts = Volts times Amps. Therefore, if the voltage was 220 volts, the motor would draw 500 amps. If the voltage was 4,000 volts, the motor would draw 27.5 amps. The voltages for large powerful motors tend to be relatively high, for example in the 380 Volts to 11,500 Volts range.
How many amps does a 50 horse power electric motor use?
Need to know the voltage of the motor.
