Before plunging into overview of the uninterruptible power supplies (UPS) and particularly 24 volt dc power supply, it is first important to understand the generation and distribution aspects related with the electricity of any region as the electrical supply and demand varies from one region to another. Electricity can be derived in a satisfactory manner from both renewable as well as non-renewable sources of energy...
Most of us are not aware of the role of power supply in a computer and overlook its importance. We ignore the fact that it is the most critical component of a PC; we say “critical” because all the other devices like the microprocessors, motherboards, disk drives, video cards, RAMs and other subcomponents of a PC are being powered by a power supply. Hence a needed power supply must ensure that all these devices are being powered appropriately and are safe in case of any voltage fluctuation. Let us take a closer look at the purpose and usage of a power supply.
Our domestic voltage supply is usually 110V or 220V AC, however the PC being a digital device operates on a DC power source of a less voltage value. It rates generally between 3.3V and 5V to power the circuitry, RAM or processor, whereas 12V are required to power other devices, such as a hard disk drive, optical drive or the cooling fans.
The power supply converts the domestic alternating current to direct current and then steps it down to the value that your devices need. When choosing a power supply we need to look for a one that can provide power to all the components that are connected to the computer and has sufficient connections to power the disk drives, optical drives and cooling fans.
Power supplies are available in a wide variety of sizes. The two most common sizes are designed for the standard ATX and micro ATX cases. The size of a ATX power suppy is 3.25’’x6’’x5.5 and normally contains two cooling fans to cool the power supply and to draw the hot air out of the ATX case. Micro ATX power supply is dimensioned 2.5’’x5’’x4’’ and has only one fan for cooling the power supply itself. ATX supplies contain more connectors than a micro ATX supply and have a higher power rating.
There was a time when power supplies were produced with a fixed number of connectors and if they were not enough to power all the needed devices, you had to use splitters. Happily the situation has changed due to fast development of PC components industry and now most of the power supplies available on the marked are equipped with extra connectors. So you are not likely to experience any difficulties with this point unless you need a very specific set of additional computer equipment. However, while choosing the right power supply you should pay some attention to this aspect of the problem and make sure that the power supply at least has as many connections as the number of devices such as drives, cooling fans, and others are included into your system. Anyway the better situation is when the power supply has extra connectors available so that you would not break down in frustration when you add some additional hard disk drive, cooling fan or an optical drive to your system.
There is a belief that the power supplies with more watts are better than ones with fewer watts. Although this statement reflects mostly emotional experience rather than rational background, it may represent some aspect of the truth. Nowadays for systems equipped with fast graphics cards and CPUs (especially multiple core systems), manufacturers typically recommend power supplies of at least 300 watts. However you should bear in mind that having a power supply with more wattage than your system actually consumes is not a big problem. The figure, for instance, 450W on your power supply does not mean that it is drawing this power constantly. Your system will charge only the wattage that all the devices need to function.
Thanks to the recent achievements in digital electronics providing the benefits of active power correctors, more advanced components and efficient design, now we can buy power supplies that produce the desired power at a relatively low energy consumption.
Meanwhile, power supplies with more watts are usually more expensive. And there is no need to overpay for them if you actually do not need that amount of power. If you are interested in more precise figures you should use one of Power Supply Calculating services which are easily accessible over the Internet. One thing that should also be taken into account is that if you are intended to upgrade your system in the future, just remember that newer equipment (particularly graphics cards, processors and so on) is as a rule more power consuming and you may be required to upgrade your power supply as well.
So, while selecting a power supply one should not act in a very economical manner, as a high quality power supply may cost more money but in the longer run it may turn out to be more reliable and will save a lot of funds and efforts. Just aks yourself "What power supply do I need?" and consider the points mention above to find the right answer.
The thing is that power supply is only a part of a longer electrical chain your computer is connected to. Traditional power supply does not protect your system from voltage fluctuations and can be damaged itself by the latter. The solution is to use surge protectors. The surge protectors are the saviors of your electronic devices (not only computer) in case of sudden voltage alteration due to, for example, lightening, intentionally engineered power outage and heavy drawing electrical equipment. This device regulates the voltage that is supplied to your computer system by either blocking or shorting it to ground if case it is above a safe threshold level.
An effective protector is the one that is able to act instantly in case of a voltage spike that usually lasts for few nanoseconds. Many protectors come with a breaker which breaks when a sudden alteration is greater than the safe threshold voltage level thereby preventing your devices from any damage. Some protectors may include additional features like noise conditioning and filter out the line noise from cable television line, telephone lines and Ethernet.
While selecting a surge protector the key factor that needs to be kept in mind is the protection not the design and the number of connectors. People mostly ignore the protection aspect while buying a protector and want more connectors. This is obviously a misleading approach. A reliable high quality surge protector is definitely not the most expensive part of your system, while it may add a lot of confidence in exploitation of your equipment and also save a lot of money in case of sufficient voltage fluctuation.