0
The output of motors are only measured in horsepower in North America. Practically everywhere else, the output is measured in watts. The horsepower and the watt both measure exactly the same thing: power. The horsepower is simply the Imperial unit, whereas the watt is the SI unit. They are interchangeable.
Wiki User
∙ 8y ago
Wiki User
∙ 10y agoThe output of a motor is alwaysexpressed in watts or kilowatts (except in the USA, where horsepower is used), never in kilovolt amperes.
The output of a generator is expressed in volt amperes or kilovolt amperes (the product of its rated terminal voltage and rated load current) because the manufacture has no means of knowing the power factor of the load to which it will be connected.
Add your answer:
Earn +20 pts
What size breaker is needed for a 125 hp motor?
It depends on what the amperage of the motor is. The motors amperage depends on the voltage of the motor. The higher the voltage the motor operates on the lower the amperage. So unless the amperage from the motor's nameplate is stated an answer can not be given.Just remember that the feeder capacity to the motor has to be 125% of the motors full load amperage and the breaker protecting the conductors to the motor has to be rated at 250% of the motors FLA. This higher breaker size allows the motor to start without tripping a normal size breaker that is rated for the lower conductor size.
What size of wire use and breaker for a 30 hp 220 volt 3 phase compressor?
Wire size calculations and breaker sizing are based on the motors amperage. If the amperage is not known the electrical code book rating are used by electricians. The book states that a three phase 30 HP motor draws 80 amps. An 80 amp motor needs a conductor rated at 100 amps. A #3 copper conductor with an insulation factor of 75 or 90 degrees C is rated at 100 and 115 amps respectively. Non time delay fuses rated at 225 amps, time delay fused rated at 125 amps or a breaker rated at 200 amps. These figures can probably be reduced if the actual motors amperage rating is used in the calculation.
How many amps does half hp motor single phase?
Presumably you mean 'rated full-load current'? The thing to remember is that motors, whether rated in horsepower (North America) or watts (practically everywhere else), are rated according to their output power. Because motors are not 100% efficient, the input power is always somewhat higherthan the output power. 0.5 horsepower is equivalent to about 373 W output power. If we assume that the motor runs at, say, 90% efficiency at its rated output, this means its input power will be around 414 W. To determine its input current you must then divide its input power by the rated supply voltage.
What size of fuse should be used for 75 hp 415v 3 phase motor connection?
To answer this question, wire size is rated in the amount of amperage that it can legally carry. Fuse sizing is based on the amperage that the wire carries. The formula to find amperage when the HP is known is I = HP x 746/1.73 x E x %eff x pf. A standard motor's efficiency between 5 to 100 HP is .84 to .91. A standard motor's power factor between 10 to 100 HP is .86 to .92. Amps = 30 x 746 = 55950 = 55950/ 1.73 x 415 x .87 x .87 = 55950/550 = 101 amps. The electrical code states that a motor conductor has to be rated at 125% of the motors full load amperage. 101 x 125% = 126 amps A #2 copper conductor with an insulation factor of 90 degrees C is rated at 130 amps. Fusing for this motor will be, non time delay fuse 300 amps, time delay fuse 175 amps or a circuit breaker rated at 250 amps.
What is the effect of induction motor on power factor?
An induction motor has a lagging power factor. Motors of more than about 2 HP are designed to have a power factor of 0.85 or higher.
What are all the different sizes of Outboard boat motors?
Outboard boat motors come in a variety of sizes and are measured in horsepower. The smallest, used to power very small craft are rated at under 5 HP while the largest are 300 HP and above.
What is kvar rating for 400 hp induction motor generator?
Is this a motor, or is it a generator? You should look at the nameplate. Generators are typically spec'd at .8 - .9 pf. Motors can run as low as .6pf. A 400hp motor definitely should have this information handy with it.
What is the rated hp for 2008 kawasaki concours?
156 HP
Are HP computers still highly rated?
Many HP computers are rated as good buys. Depending on your budget there should be a HP computer or laptop that fits your needs that is rated above average.
What is the 2008 Chevy 4.8L V8 rated hp?
295 hp
What is the horsepower rating of a 2003 Honda 750?
The Honda Nighthawk 750 is rated at 75 hp. The Honda Shadow Spirit 750 is rated at 60 hp. The Honda Shadow ACE 750 is rated at 43 hp.
Examples of big business?
Cingular, Sony, HP, Dell, FOX, CNN Ford Motors, General Motors Shell, BP, ESSO Boeing
How much hp does a 2005 Ford Ranger have?
It depends which engine it has, i am unsure of the 3.0 v6, but the 4.0 v6 for that year was rated 210 hp, and the 2.3 i4 was rated at 143 hp. These ratings are both crank hp ratings, not wheel hp.
How do you figure maximum speed of a 130 HP motor?
With the motors spec sheet or a tachometer.
2001 honda xr80 hp?
This bike is rated around 11 hp.
Which motors can lift a helicopter?
Many motors are suitable. A Compact Radial 2 cylinder engine used in many kit helicopters can give you 60 hp.
How much hp does a arrow c66 pump jack motor have?
Rated for 14 HP
