Lapara LA-AVR-1200 User Manual

 

www.laparaups.com

 

 

 

 

You can find three different types of UPS: Off-Line, Line-Interactive and On-Line. 

 
Basically, the loads connected to an Off-Line UPS are powered by the utility means. The UPS batteries 

start to work when a power failure happens. In that moment, almost instantaneously, the UPS powers the 
connected loads with their own batteries.  

Application: Areas with few electric disturbances and good quality utility means. 
Diagram: 

 

AC Output 

 

 

A Line-Interactive UPS is very similar to the Off-Line UPS but it is equipped with a special microprocessor 
that controls the mains’ fluctuations, regulating the output voltage (buck/boost effect), without 

discharging the batteries. In case of power failure, the batteries automatically start to power the 
connected devices.  

Application: From domestic PC to small network servers, offices or small business.  
Diagram: 

 

 

 

An  On-Line UPS, also called “double-conversion UPS”, is equipped with both an AC/DC rectifier and a 

DC/AC Inverter, and is continuously providing power from the batteries. That means that it is a real 
electric firewall for any sensitive device.  

Application: Any computer network, critical and essential (data networks, servers, telecommunications, 

industrial applications, …). 

Diagram: 
 

 

 
 

 
 

 

AC Input 

Charger/ 
Rectifier 

DC/AC Inverter 

 

AC Input 

AC Output 

Charger/ 
Rectifier 

DC/AC Inverter 

Voltage Regulator 

PFC Rectifier 

DC/AC Inverter 

 

AC Input 

AC Output 

Charger/ 
Rectifier 

DC/DC Booster 

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