An uninterrupted Power Supply is an intermediate device between a power supply and a device. It prevents undesired features of the power source from the supply from affecting the performance of the device. Ac UPS has internal batteries to guarantee that continues power is provided to the equipment, even if the power source is switched off. The power supplied by UPS is for less duration of time, but that helps in proper shut down of the system preventing damage to hardware and software parts. The duration of working of UPS depends on the size and the kind of equipments used.

The UPS Store San Francisco has the following types of UPS:

1.Standby Power Supply (SPS)/Offline UPS: They are the simplest and least expensive UPS. The power is derived directly from the power line, until the power supply is switched off. After power failure, the battery inside the UPS is used to provide the power supply. The battery is charged automatically, whenever the power is available.

2.Hybrid UPS System/ Ferroresonant UPS: When normal operating line is available the supply conditions power using a ferroresonant transformer. It provides a stable output voltage during voltage during fluctuations. It uses three coil transformers.

3.True UPS System/Online UPS: They operate from the inverter. These devices are very costly, the power consumption is high and the heat generated is more. The true UPS are always on but this does not increase their reliability. These have their battery always in the circuit; therefore there always is instant backup.

4.Line Interactive UPS: It provides a clean and regulated output. Some of these UPS have battery extension capability that enables the additional batteries to be connected. They have a small size and less cost.

5.Double Conversion Online UPS: The primary power path is inverter. It provides almost ideal electrical output performance. However, its constant wear on can reduce its reliability.

6.Delta Conversion Online UPS: It is a new technology, introduced to eliminate the drawbacks of Double Conversion Online UPS. It moves much of the power from input to output directly.

7.Parallel Redundant UPS/N+1 Redundancy: It uses a number of UPS operating in parallel. It is used in mission critical applications, or in demanding environment such as industrial process control.

The UPS provided by the UPS Store San Francisco have the following advantages:

1.Computer jobs don't get stopped due to power failure.

2.User feels no inconvenienced from shutting down of computer

3.Equipments are not harmed due to hardware failure

4.Data is not lost

The UPS provided by the UPS Store San Francisco have the following functions:

1.Absorbs less power

2.Smooth out noisy power source

3.Continue to provide power

4.Provide power for some time after a black out has occurred.

5.Automatic shut down of equipment

6.Monitoring and Logging of status of the power

7.Display the voltage currently online

8.Display the voltage/current draw of the equipment

9.Restart Equipment after a long power outage.

10.Provides alarm on certain error conditions.

11.Provide short circuit protection.