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You can use the initial Watts to Amps calculator if you want to convert automatically.

Where?

The Watts are used to determine the energy consumption of the equipment and the larger the value, the greater it will be.

You can use the tool to convert the line-to-line voltage to line-neutral.

If you only have single phase voltage, you can use this tool to convert it to three phase.

Generally the equipment that has this type of voltage are LED luminaires, DC motors, electronics such as cell phones, televisions, computers, etc. These equipment always have to convert from AC/DC through a transformer, this in order to be able to connect them to AC voltage. which is common in homes.

The closer the power factor is to unity, the more active the power is. The power factor affects the output power of the device.

Before converting from watts to amps, you must be clear about the watts to amps formula, in this article we show what are the steps to carry out the conversion.

To convert from watt toamp, you need to know three variables: the watt, the type of voltage, and the number of phases for AC electrical systems.

The number of phases and the power factor do not appear explicitly on the plates of the electrical equipment, so the last values must be deduced from the tables.

For the previous case we can deduce that the number of phases of the equipment is 2 (biphasic), this is deduced by the type of connection and the voltage (See figure 2), actually knowing the number of phases in this way depends a lot on the experience (Voltages in the world)

The power factor is specific to each equipment and can be found on the nameplate.

If you don't have this factor, you can see the power factor tables.

The watt to amps formula can be used manually or automatically. The steps for calculating watt to watt are listed.

You must identify which is the formula that works for you (AC, DC, three-phase, single-phase, two-phase), then it is only to replace each variable, in the case of three-phase systems, you only have to multiply the root of 3 by the line-to-line voltage and the power factor, for example if you have a 2000watt electric motor, with a voltage of 480Volt and a power factor of 0.83, you must multiply the factors as follows: √3x480x0.83=690.

The result will be: 2.89 Amps., after dividing the watts by step 1.

Many examples and exercises from Watts to Amps can be found here.

In a summer house there is a Wi-Fi antenna with 800Watts (AC), the antenna is connected to a neutral line voltage of 127V and according to the equipment's characteristic plate they have a power factor of 0.98, how much amperage will the Wi-Fi antenna have? .

The easiest way to do the calculation is with the watt to conversion tool.

The other form of conversion is by calculating manually, the first thing you should do is identify the watts to amps formula that works best for you, in this case it will be the formula for single-phase AC systems, then you should enter the variables as they appear in the formula, in short, the single-phase voltage must be multiplied by the power factor (127Vx0.98), then the watts must be divided by the result of the previous equation as follows: 800/(127×0.98)= 6.43A.

The forklift in the warehouse has a consumption of 5000 Watts, a line voltage of 240V and a power factor of 0.82, but what amperage will it have?

Answer:// It is simple, you just have to multiply the voltage, by the root of 3 and by the power factor (√3x240x0.82), which will give 340.9 as a result, then you will have to divide the watts between the result, so as follows: 5000/340.9=14.7 Amps. The formula was taken from watt to three-phase.

A metal halide lamp has a power of 400 Watts biphasic, a line to line voltage of 208V, and a neutral line voltage of 120V, what is the lamp's power factor?

To arrive at the result, the watts must be divided between the multiplication of the neutral line voltage, power factor and number 2, which will result in 1.79.

You can see that the conversion from watt to Amp is different due to variables such as power factor and internal operation of the equipment, in these tables.

The table shows the equivalency of watt to watt for the most used appliances.

The table shows the power factor and watt to watt equivalency for a 120V voltage.

You can find the DC conversion in the table.


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How to watts in amps?

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Put your drawing code into an event handler (like redraw event), and use a timer to generate events at regular intervals (e.g. 10/s).


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  1. if possible, cache indefinitely, and write a new value when a change is made. try not to do an explicit delete, as you could cause a race condition with multiple concurrent accesses to the data trying to update the cache. also implement locking if an item does not exist in the cache to prevent the above issue (using memcached "add" + short sleep time in a loop)

  2. refresh cache in the background if possible, using a queue. My implementation currently uses a multi-threaded perl processes running in the background + beanstalkd, thus preventing lag time on the frontend. most of the time changes can incur a short lag.

  3. use memcached getmulti if possible, many separate memcached calls really add up.

  4. tier your cache, when checking for an item, check a local array first, then memcached, then db. cache result in the local array after first access to prevent hitting memcached multiple times in a script execution for the same item. EDIT: to clarify, if using a scripted language such as PHP, the local array would live only as long as the current script execution :) an example:

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  5. write a wrapper function that implements the above caching strategy #4.

  6. use a consistent key structure in memcached, eg. 'userinfo_{user.pk}' where user.pk is the primary key of the user in the rdbms.

  7. if your data requires post processing, do this processing where possible BEFORE placing in the cache, will save a few cycles on every hit of that data.


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Using perl Tree::Suffix might be easiest solution. Apparently it gives all common substrings in a specified length range:

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