A UPS is a device that provides backup power and protection to equipment connected to an electrical network in case of failures or fluctuations.
There are different types of UPS, but the most common are interactive and online. What are the differences and how to choose the most suitable one? Here are some points to keep in mind:
- Operation:
In line interactive UPSs, the inverter (which converts the direct current from the batteries into alternating current to power the load) is activated when there is an outage or a variation in the power supply.
In online UPS, the inverter is always active generating power for the load. The mains is only used to charge the batteries. This means that online UPSs offer greater protection and continuity, but also consume more energy and generate more heat. - Devices:
Line-interactive UPSs are suitable for equipment that is not critical or can tolerate some degree of variation in power quality, such as personal computers, printers, scanners, etc. Online UPSs are ideal for critical equipment or equipment that requires constant and stable power, such as servers, medical equipment and industrial equipment, etc. - Cost:
Line-interactive UPSs are cheaper, both in terms of purchase price and maintenance. Online UPSs are more expensive due to their greater complexity and efficiency. However, the cost should be evaluated based on the value of the equipment to be protected and the level of risk to be assumed. - Performance:
Line interactive UPSs take some time (imperceptible to people) to switch power delivery between the mains and the batteries when there is an outage. This can cause problems in sensitive equipment or switch-mode power supplies. Online UPSs have no transfer time, as they are always feeding the load from the batteries. This ensures greater reliability and safety. - Capacity:
Line-interactive UPSs are limited in capacity by the size and power of the inverter, which is limited by the size and power of the inverter. only used in case of emergency. Online UPS have a higher capacity due to the size and power of the rectifier, which is used continuously to charge the batteries. This allows to connect more equipment or to have more autonomy.
These are some of the aspects you should consider when choosing a UPS. You should also take into account other factors such as the available space, the noise it generates, the ambient temperature, the frequency of power failures, etc. The most important thing is that consult a Kaise expert for UPS selection that adapts to your company's needs and provides the best protection for your equipment.
