Uninterruptible power sources are available in three different types. Knowing them will help you decide which type of system you want designed as well as which among them suits you best. Whatever type of UPS you need, NYE can be of help.
Likewise called the double conversion UPS, this system uses either double or delta conversion technology. Compared to its offline counterpart, an online UPS has its DC/AC inverter always connected. There is no transfer time between the battery and the main power source; as a result, it can provide better protection from total power failure, spikes, electrical noise, and more.
With the double conversion technology, network equipment won’t receive direct power from the AC outlet. AC power instead travels toward a rectifier where it is converted to DC power. After that, it then travels to the battery then to the inverter. Once power is converted back to AC, it's then delivered to the appliances.
During a power failure, an online system will maintain a consistent current flow to protect network equipment. In the event of power outage or fluctuation, the rectifier is bypassed automatically, and the battery will be the one providing power until the main power source is restored. Due to an online UPS’ seamless circuitry, it costs more than offline units and even line-interactive systems.
We are also capable of designing online uninterruptible power sources that are more affordable and cost-efficient.
Also called a standby unit, the offline UPS is generally used for delivering short-term backup power to computers, VoIP equipment, and modems. It’s made of an AC/DC and DC/AC inverter, a battery, static switch, and a low-pass filter for decreasing switch frequency from a surge suppressor and o/p voltage.
The unit will receive utility power via a direct AC connection. Both the unit and its inverter will be put on hold until emergency power is required. Depending on the model, it can also be used for protecting data and sensitive equipment from power interruptions such as spikes and surges. Compared to the other types of UPS, this one is the least expensive.
Once a standby UPS detects main power failure, it will then initiate the supply of backup power. The process will take milliseconds following a failure though response times may vary depending on how the unit is designed.
Although the switch time isn’t instantaneous, it happens in a very short period of time and won’t be able to interrupt power flow toward your equipment. Meanwhile, if the power outage is expected to last for a long time, the unit’s backup power will let you save data before shutting down your equipment, allowing both of them to last.
Line-interactive units are commonly used in small businesses. They are designed in a way that they function like a standby UPS but with an automatic voltage regulator included. Basically, it’s a mixture of standby and an on-line UPS. As a result, it will be able to automatically regulate voltage.
During a power failure, line-interactive systems will provide protection to sensitive data and equipment. They’re basically more expensive than the typical standby units but are a bit more affordable than online systems. Also, they can maintain performance during both low and high voltage conditions.
Which Unit to Choose
Each UPS unit has its own advantages and downsides, and due to such limitations, it’s important to decide which unit you want before we can proceed to create the design. During the designing process, we will incorporate several techniques that will help create a more efficient unit for your facility.
If you need a simple and inexpensive option, then the standby UPS is a perfect choice. It features high efficiency since it won’t continuously use the battery, except during frequent switching. The downside is that it has lower spike protection and produces a not so reliable output.
However, if you’re aiming for the highest reliability and protection from total power failure and spikes, the online UPS is ideal. It also involves zero switching time, although it’s a bit more complicated to design and will cost you more during the manufacturing process. Likewise, its overall efficiency is lower as the inverter is always on.
Lastly, if you prefer a unit with zero switching time and lower operating costs and power consumption, then the line-interactive UPS is for you. Unfortunately, it’s a bit larger and heavier than the other two. Additionally, it will end up depleting battery power a lot faster if the AC power is unstable.