Printers

Printers or the Printing Devices for the Personal Computers have different types like it may be Ink Jet Printers or may the Laser Printers. Both types have different technology for the Printing .The Inkjet printers use the inks in their Cartridges where as Laser Printers use Toner Powder for the printing purpose.

In early ages when some one needed to print a color output then a Ink jet printer was required as Ink jet printers were available in Color printing options.Other Color Printers of Laser quality were also there but these were very expensive.

In case Black printing is required then you have two options,that are, you can use Inkjet Printers or you can use Laser Printers.If you concerned with cost of ownership then Inkjet Printers will be fine but if you are concerned with the cost of usage it is true that the Inkjet printers are not good,that is why market for Laser Printers is catching fire.

So if the Black Printing is required then Laser will be a good choice ,but if Color printing is required then Inkjet Printer will be a good choice.

Low Frequency Verses High Frequency UPS

Purchase of Uninteruptable Power(UPS) Supply is very tricky.There are many topologies for the UPS like Off Line , Line Interactive and ON line UPS. When you go beyond 5000VA ,Line Interactive UPS does not suit you due its high price , and if you are going to purchase UPS below 750 VA ,it is not recomended to buy ON line UPS.

It means that if you want to purchase UPS below 750 VA you may go for OFF Line UPS .

Before making any decision about UPS topology, it is important to understand the requirements of the equipment to be protected and the environment in which the UPS will be installed. After undersatnding these basic requirements you can decide which UPS topology will be the best that serve the application.

In ON Line UPS size of the UPS’s transformers may be different for High and Low frequency for example for a 5 kVA UPS, a low frequency transformer weighs about 130 lbs.
The same transformer operating at a higher frequency, weighs may be only 9 lbs., which the size and weight of the UPS substantially.