The answer is We assume you are converting between pound and ton [short, US]. You can view more details on each measurement unit: lb or tons The SI base unit for mass is the kilogram.
Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between pounds and tons. Type in your own numbers in the form to convert the units!
You can do the reverse unit conversion from tons to lbor enter any two units below:. The pound abbreviation: lb is a unit of mass or weight in a number of different systems, including English units, Imperial units, and United States customary units. Its size can vary from system to system. The most commonly used pound today is the international avoirdupois pound. The international avoirdupois pound is equal to exactly The definition of the international pound was agreed by the United States and countries of the Commonwealth of Nations in In the United Kingdom, the use of the international pound was implemented in the Weights and Measures Act An avoirdupois pound is equal to 16 avoirdupois ounces and to exactly 7, grains.
The short ton is a unit of mass equal to lb exactly There are, however, some U. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types.
Examples include mm, inch, kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!Hosain yahoo. So calculate your primary fuss box for A max load and you wire size will be 1 Awg.
If your motor has any type of failure during opperations, your feeders will still be protected. It will suffice for your motor. Not true. FLA is current at rated horsepower. LRA is current draw with locked rotor. Starting current is a function of motor AND load.
Convert hp to ton - Conversion of Measurement Units
I normally wouldn't add a post here because the other answers give a fairly good range of answers to the original post. However, the score of 1 for "good answer" requires my rebuttal. Perhaps we need a place to rate posts for a "bad answer". You've got my support on that one - for whatever value it has. Thanks Lot Mr Marco Kes :. Thanks Mr. Marco Kes :. Use the x 6 as a very rough rule of thumb only. I would not rely on a "calculated" value for protection settings or cable sizing.
Get the right answers from the manufacturer. LMPhotoni cs. Siemens has some training available from the home page. Here's the motor page. They might be able to help you with a specific application. Fortunately, at starting LRA condition load is low-low. The rule is usually a conservative rule of thumb for calculating inrush LRA. But I would not use it for setting an overload for the running amps.
Contact the manufacturer. You can't! There are too many variables involved. You can only guesstimate the FLA based on the information given. Post 4 is your best "guessing" answer so far.
If you can't read the motor nameplate to get the FLA, contact the manufacturer. If you can't read the Manufacturer's name on the nameplate, post a photo of the motor. Maybe one of us can recognize it.InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website.
This article explains how to calculate the horsepower of an electric motor if we know its wattage or current draw in amps. The article gives a simple formulat to convert electrical amps to horsepower and explains what data are actually needed to make an accurate horsepower calculation or rating.
These electric motor horsepower formulas, definitions, and ratings are suitable for determining the horsepower of an air conditioner compressor motor, a fan motor, a well pump motor and similar equipment.
You can find the basic rating data for an air conditioner compressor motor or for other HVACR motors by noting information on the data plates we describe in detail. An accurate answer to the question of translating RLA into horsepower requires more data: the voltage leel and the number of phases of electrical current. And comparing HVAC compressor motors by amperage ratings alone may be misleading. Compressors need to be compared for the same rated conditions and same area of application, as motor designs and uses vary.
But for typical residential air conditioner systems and heat pump systems we can assume we're talking about V and 2-phases of power. Since the maximum rotating power or force exerted by an electrical motor is that needed to get the motor spinning we should look at the motor's LRA or FLA rating.
The RLA or running load current draw in amps will always be a smaller number than the motor's maximum. We'll give the motor horsepower as its maximum in our examples below but you can choose any amperage rating to calculate an equivalent horsepower number.
Convert lb to tons - Conversion of Measurement Units
To express watts in amps or current is not reasonable since these are two different measurement scales Watts in power and amps in coulombs per second. But if we know any two of the three basic electrical measures amps, watts, and volts we can calculate the third value.
We can write the famous and simplified equation in any of the three ways using simple algebra:. Using the same calculation as above but finding the horsepower exerted when the air conditioner motor is running at normal load that is not at start-up and not with abnormal head pressure. So the horesepower being delivered by our air conditioner when running at normal load is around 2. To make those two things comparable you need to consider motor efficiency in the equation. Also if the motor is three phase you can reduce the amps by 1.
There is more but this is the basics. If motor is driving the max load it is allowed, it will run at RLA. Most compressor motors will run less than RLA because they are not typically fully loaded. Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. Just ask us! Share this article. Search the InspectApedia website. Tel: Email: info carsondunlop. Carson Dunlop Associates' provides extensive home inspection education and report writing material.
The text is intended as a reference guide to help building owners operate and maintain their home effectively. Field inspection worksheets are included at the back of the volume.Remember Me? What's New?
Results 1 to 16 of Please help. What is horsepower of that compressor. Originally Posted by pinoyako. Originally Posted by chemi-cool. Originally Posted by goshen. Hi in order to calculate please give some info on voltage ,this is an important factor and of course no' of phases!! Please where is the website that i will visit to see the compressor capacity by its model. If you cannot, than you need to find displacement of original compressor to find replacement one with same pumping capacity.
Horsepower in cooling capacity is of not much practical use here because of rounding practice. Since window type AC have usually capillary tube as expansion device it is essential for proper work and compressor longevity that compressor have as much as close capacity at same conditions or displacement. Join Date Apr Location u. Originally Posted by moideen. If you know LRA, you can find out exact running ampere.
Originally Posted by surenuff. RE The time now is PM. All rights reserved. This forum and its pages must not be copied or reprinted without the written consent of Refrigeration Engineer.
This forum is a free and open discussion board.It uses a standard pea gravel density. Many builders and gardeners face the task of calculating or estimating the amount of gravel they would need to fill a given space or cover a given area with a layer of gravel. Our gravel calculator is a great assistance in such cases, keeping in mind that the results will only be as good as the entered measurements and density.
The process is as follows:. To calculate how much gravel you need to cover a rectangular area you need to multiply the volume by the gravel density. The volume formula for a rectangular or square box in cubic feet is height ft x width ft x length ftas seen in the figure below:.
Our gravel calculator handles all this for you given you supply the dimensions. If the area you want to cover with gravel, or the shape you want to fill is round, the calculation is a bit different:. The volume of a figure with a round foundation is its height times the area of its foundation.
Again, the gravel calculator will do this math for you. In case the area you are calculating has an irregular shape, things get a bit more difficult, but in general what you would want to do is divide it in several regularly-shaped sections, calculate their volume and gravel requirements and then sum them up together.
The one-click copy function of our gravel calculator should come in handy. In case you end up with a large number of sections to sum, you might appreciate our summation calculator. Gravel is a naturally occurring material, consisting of water-born pieces of rock and is found in buried or current stream beds.How To Compute Horsepower
The peas are usually rounded with smooth surfaces, while other properties depend on "parent rock". You may also encounter "crushed gravel", which is simply larger gravel particles crushed to a smaller desired size. Gravel is usually sold with a guaranteed maximum particle size, e.
This means that no side of any particle will be larger than the specified measurement, which is achieved through screening, usually using industrial automated screeners.
Note that a gravel's density depends on this, so make sure to consult the manufacturer's technical specifications for the estimated density which you should then input in our gravel calculator. Crushed stone is often used as a material for producing concrete. It is also used as a road base, and in some locations it is used for paving roads, for example Russia has overkmmi of gravel roads. It is a great driveway base material, bike path base fill, paver patio sub base, walkways, and just general fill material.
Some types of gravel offer excellent drainage as water is able to percolate through the stones leaving your property or walkway clean and dry.
Contrary to what you may think, there is more than one type of gravel, both by composition and size of the stones. Selecting the right size and style is crucial for the success of any construction project, as some are more versatile and have a different application than others. For example, landscaping gravel would last longer than mulch or pine straw, making it great for outdoor spaces requiring a durable material, while construction gravel provides solid footing for construction and landscaping.
Different types of gravel have different densities and by knowing it you can get a more accurate estimate for the amount of gravel you need from our gravel calculator.
It is further categorized in several types, listed in the table below  :. For small projects, you can buy pea gravel in small bags, but for larger projects, you would need to buy by the cubic yard or by the ton cubic meter or tonne.Remember Me? Page 1 of 3 1 2 3 Last Jump to page: Results 1 to 13 of Thread: AMPS??
Thread Tools Show Printable Version. Need a refresher on these. Thanks ahead! It occurs instantly during start up. Often mistakenly called running load amps which leads people to believe, incorrectly, that the compressor should always pull these amps. Originally Posted by rundawg. If you were to charge a system to RLA you would easily overcharge the unit.
This takes into account the power necessary to overcome the mass of the rotor into a turning force and the induction loading of the stator to create all the necessary magnetic flux to make the rotor turn.
Once the rotor begins to turn the amount of amperage will decrease rapidly. There is one other term used for electric motors that is important, that being service factor.
A motor with a service factor of 1 the name plate amperage is used to calculate overloads. A service factor of 1. Hope this helps -GEO. Once in a while everything falls into place and I am able to move forward, most of the time it just falls all over the place and I can't go anywhere-GEO. Originally Posted by Snapperhead. Mid februaryone of my first tune-ups i thought the system was low because it wasnt pulling the 22 ampsand pressures looked a little lowso i added until i saw 22 amps Boss comes over and was like.
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Originally Posted by BigBacardi. Birdman27 liked this post. Hey rundawg what does PLT stand for? Originally Posted by dembones Hafeed Abuzriba liked this post. Page 1 of 3 1 2 3 Last Jump to page:. Please read this Valves, Regulators, Filters, Etc. Subscribe to this feed. People: December The Unsafe Superstar. Code Quiz of the Week: No. All times are GMT The time now is PM.All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.
Hottest Questions. Previously Viewed. Unanswered Questions. Heating Ventilating and Air Conditioning. Wiki User Compresser lra fulafme. Sorry you please answer. If you need more information, pls contact me: mould sinomould. Asked in Mechanical Engineering How do you calculate press tonnage? Length x width x depth in inches. Then x. Apply an ammeter to the common wire of the compressor and turn power on. The highest peak amps are the LRA.
Asked in Mechanical Engineering How do you calculate tonnage of forging press for the part to be forged? For steel, the formula is material thickness x inches of cut x 50, The 48 in the serial number denotes the tonnage. Divide that number by 12 to get the tonnage of 4.
How to Calculate HVAC Tonnage
LRA stands for Lock Rotor Ampere on compressor and means that it is a high inrush current during starting period of the compressor. Lord's Resitance Army. LRA stands for locked rotor amps. It is the very high current drawn by a motor at the instant it receives power, but before the motor has started to turn. Typical LRA values can be anywhere between 3 and 8 times the full-load running current. Trending Questions.