Line Interactive UPS are generally used to protect small parts of critical servers and associated networking devices. The line-interactive design usually incorporates a tap-changing AVR transformer. This adds voltage regulation by adjusting transformer taps as the input voltage changes. Voltage regulation is an important feature when low voltage conditions exist, otherwise, the UPS would transfer to the battery and then ultimately shut down the load.
This more frequent battery usage can cause premature battery malfunction. However, the inverter can also be designed such that its failure will still allow power flow from the AC input power source to the load, which eliminates the potential of single-point failure and adequately provides for two independent power paths.
Line interactive UPS system
that excludes the inrush current phenomenon for transformer-coupled loads
Sudden voltage drops and outages often interrupt the process of sensitive loads for domestic, commercial, and industrial applications. In some cases, these conditions may even impair the functioning of relevant equipment. To sustain power under such situations, a UPS system is usually installed. Once a disruption occurs at the grid side, the line interactive UPS system takes over the load to prevent an interruption. But, due to the magnetic saturation of the transformer, a vital inrush current may occur for the transformer-coupled loads during this transition. The generation of such transient currents may in turn lower the line voltage and activates over-current protecting devices of the system. In this work, a cost-effective, line-interactive UPS system is recommended that excludes the inrush current phenomenon associated with transformer-coupled loads.
The holdup time of a UPS system against uncertainty is thoroughly dependent on the rating of the load and the energy storing capability of the UPS setup. Based on the configuration and operating principles, UPS systems are mainly categorized into three main types-
2) Online, and
However, line-interactive UPS systems can be further categorized into two topologies-
1) Single converter-based topology and,
2) Double converter-based topology.
The oldest line-interactive UPS topology is the single converter-based type, it comprises a bi-directional converter coupled in parallel with the utility and load. The converter acts as a charger when the utility is in a good condition. However, the installation also works as an inverter to supply backup power under unusual utility power conditions. For the isolation of load, a typical approach is to install a high leakage inductance series transformer between the utility and load. Conversely, it intensifies the overall size of the system. Despite offering low reactive power compensation, this type of line-interactive UPS in Malaysia provides the advantage of input current harmonic suppression.
These UPS continually condition and regulate AC utility power to devices via a power converter. Upon loss of utility power or when the utility power falls outside of the input range of the power converter, the UPS battery will support the loads through an inverter. The power converter filters the utility AC power, suppresses voltage spikes, and regulates the voltage to produce the required power to equipment loads. Among its advantages, the cost is relatively low, and it offers energy efficiency of 96-98 percent. Line-interactive UPS also gives high reliability because they have fewer components.
As one of the foremost choices, line-interactive UPS that meets the demands of high power reliability is perfect for departmental servers, houses, small businesses, and medium enterprises. In some infrastructure-challenged areas where the AC line voltage is variable, fluctuates recklessly, or is highly distorted, a line-interactive UPS may require to charge the battery once or twice a day or even more frequently.
Key advantages of a line-interactive UPS
Reasonable voltage conditioning.
Lower power consumption.
Lower component count.
Lower operating temperatures.
Right Power Technology, founded in 2000, as a pioneer in developing and manufacturing advanced UPS systems and solutions, Right Power Technology now has the enviable distinction of being a significant player in the industry, education, and commercial fields. Visit our official website to see the best line interactive UPS system suited to your requirements.