The design of uninterruptible power supply is determined largely by the function required and at what level the critical coverage is designed to protect the cargo.

At the lower end of the scale are “High Desk of UPS offline, is generally less than 1 kVA, as its name suggests, it is an unregulated supply of filtered load while maintaining the battery in a separate charger.

If the utility fails or a power failure tolerance, the inverter starts and the load is connected via a relay. This is a short pause while this operation takes place and the duration of this pause is the moment of transfer.

Offline UPS systems is not suitable where there are large differences in the power utility company premises, as the load will be directly affected. can be used to solve this problem, a Line Interactive UPS System, the technology works similarly to the offline UPS systems, while the unit is not providing power to the load, unless a power failure or loss of tension occurred. The Line Interactive UPS system uses an active voltage regulator (AVR), the load voltage during normal operation control seen, this method ensures that the load has a constant tension in him. These inverters are more suitable for small office environments, loads, and are generally limited to a maximum of 10 kVA.

Traditionally for larger loads of the double conversion UPS system has been favored, at bottom it consists of a rectifier, battery, inverter and static switch. This is commonly called True On-Line UPS –

The term “True On-Line” is used because this type of UPS to protect your business really, so that when you remove the power source, then engage the power, it will not affect your gear. <, Br />
How is it there? The True online uninterrupted power supply is having a rectifier that converts the power utility AC power into DC, the dual function of a DC power supply for the inverter and also an offer to recharge the battery . Then do the same in the case of utility lines in or out of tolerance in voltage or frequency cause the rectifier to turn off the battery, continued without interruption to supply the DC power supply for the inverter.

The inverter converts direct current to alternating current to return the voltage and frequency controlled to supply the load. The cost is therefore fully protected from power surges, voltage spikes or sags in the electricity grid.

The supply of double conversion uninterruptible power supply has the additional advantage of what is usually called the static switch, it is an electronic switch, which selects the provision of the required load. Food can either provide the power grid or not protected the drive fully protected. This feature can be very useful to appear in case of congestion, which is on the evaluation of the inverter, the load will be transmitted automatically and without any loss to the electricity grid to provide transmission back in the drive protected if the defect has been corrected.