This transformer responds to changes in the AC power and can automatically regulate issues. In comparison, online UPS models use an inverter to transmit all or some of the power, at all times. It takes an interactive UPS a matter of milliseconds to switch into battery backup mode when a failure occurs. Reliable power management systems help to ensure that electrical power to valuable equipment is never interrupted. When buying a UPS unit, the volt-ampere VA rating of the device should be compatible with the total load that must be protected.
This load will include all equipment and network accessories. An advanced online UPS system uses double conversion technology for power management. It delivers consistently clean power, even during the brownout or blackout, for server-grade and data centre systems.
Review of the Top 8 UPS. What is a UPS device? What are the different types of UPS? What is a Standby UPS? What is Backup UPS?
What is Online UPS? What is Line-interactive UPS? What is the difference between Online vs. Line-Interactive UPS? The transfer time in case of Online UPS is zero as there is no switching between the inverter rectifier path and mains supply path.
While Offline Ups possess transfer time of about 5ms. Comments Very good explanation. Leave a Reply Cancel reply Your email address will not be published.
An online UPS is one which supplies the AC power through rectifier and inverter combination circuit in case of power availability as well as in power outage. An offline UPS is one which supplies the AC mains power directly to the load in case of power availability and whenever there is power outage it supplies power to load through backup battery.
Heat dissipation is more in comparison to offline ups because online ups is ON continuously. Heat dissipation is low because offline ups is switched ON only in case of power outage.
Time required to switch the path during power outage is termed as transfer time. As the transfer switch in case of online ups is always ON thus, transfer time is zero. Electrical Technology 1 7 minutes read. Show More. Related Articles. Electric Bill Calculator with Examples.
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Please consider supporting us by disabling your ad blocker. We depends on ad revenue to keep creating quality content for you to learn and enjoy for free. The UPS that supplies power from the AC mains to the load through the rectifier and inverter combination. It continuously draws current from the battery.
It only draws current from the battery during primary source failure or power outage. It requires a large battery charger circuit because it carries the entire load current. It requires a small charger circuit because it only charges the battery.
The input supply and the load is completely isolated. There is no isolation between the input supply and load. It has high-performance output because it protects the output load from input voltage spike and distortion.
Its performance reduces with the input voltage distortion; which is directly connected to the load. The output circuit will be charged from the battery power and the battery will be in continues charging state. The best example for on line ups is your laptop. In laptop, there is a battery, and you can switch on the computer laptop even without connecting power source. However, our use might be, our device gets power only from the charging or charged battery connected to the main power supply.
The important feature in online ups is, you never get power interruption until your battery drain out. Under Normal condition the raw power supply will be connected to the load, but they feed the power to load, when there is an interruption of AC raw power supply.
It needs some switching delay for delivering power to the load, but the delay can be manageable. One of the best examples for offline UPS is the desktop computers, that we use at our homes or office. Those computers have a separate UPS unit and it supplies power to the computer in the case of power failures.
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