What are the primary types of uninterruptible power supply?
What will be an ideal response?
There are two primary types of UPS. An off line UPS is considered the least expensive and simplest solution. During normal operation, the equipment being protected is served by the standard primary power source. The off line UPS battery charger is also connected to the primary power source to charge its battery. If power is interrupted, the UPS will quickly (usually within a few milliseconds) begin supplying power to the equipment. When the primary power is restored, the UPS automatically switches back into standby mode. An online UPS is always running off its battery while the main power runs the battery charger. An advantage of an online UPS is that it is not affected by dips or sags in voltage. An online UPS can clean the electrical power before it reaches the server to ensure that a correct and constant level of power is delivered to the server. The UPS can also serve as a surge protector, which keeps intense spikes of electrical current, common during thunderstorms, from reaching systems.
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