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.
The same transformer operating at a higher frequency, weighs may be only 9 lbs., which the size and weight of the UPS substantially.
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