Standby
Standby or (often referred to as offline) UPS power supply might normally be used for domestic electronic systems, security systems and is ideal for use in small offices.
Called a standby UPS system since the inverter and the battery do not supply any power unless the main source of power goes out. It essentially remains on a standby mode unless it is needed. The main source of power used by this system comes from a utility or power line. The system has a transfer switch that automatically selects the backup power provided by the battery once the main source of power goes out.
Standby UPS systems make use of stored battery backup power during an outage, or when the voltage levels dip or surge. Considered as an entry-level UPS, standby systems will protect you and your equipment giving you that imperative battery backup.
If the power goes out, the UPS system provides connected devices with backup power from its internal battery. During an extended blackout, battery backup gives you an opportunity to properly shut down equipment, like computers and DVRs, that can lose data when turned off unexpectedly.
One issue raised against the use of a standby UPS power system is the time it takes to switch from one power source to another. There may be some instances where the switch is not fast enough to ensure uninterrupted use of a PC system, but this situation rarely happens.
Line-interactive UPS systems
Line-interactive is a mid-level UPS protecting you both on and offline. This type of uninterrupted power supply can correct power without switching to battery-based reserves.
“Voltage independent” UPS in compliance with IEC 62040-3, also known as line interactive, protects against the most common network power problems experienced. Here, the UPS also monitors the voltage level and balances under and over voltages. VI technology offers a good compromise between reasonable security and moderate operating costs.
A Line-interactive UPS contains an autotransformer that regulates any over or under voltage. It can be used for consumer electronics, network equipment and entry-level servers. This type of UPS is interactive as it automatically selects different power taps on the autotransformer and can maximise any limited battery reserves by correcting any power fluctuations and managing current levels in an outage or power surge.
OnLine Uninterruptible power supply
Generally the more expensive option, online UPS are the premium solution for critical electrical equipment, and act as an ‘electrical firewall’. Yes, it protects against power outage but it also regulates the level of power delivered to your device.
The online UPS is connected to the main load at all the time or until the battery in it gets charged. In this case, our electronic device gets the power from the online UPS and not directly from the AC main supply. So, even when the main AC fails, our electronic device’s operations need not be stopped. One such good example for online UPS is the Laptops. We could use laptops while it is charging or we could even use it later after getting charged. However our use might be, our device gets power only from the charging or charged battery connected to the main power supply.
Read more: Difference between Online UPS and Offline UPS | Difference Between: https://advancedpower.co.uk