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If the electricity is often turned off, and the network voltage itself is unstable, uninterruptible power supplies with double conversion, they are online UPS, come to the rescue. Such devices not only provide the equipment with backup power, but also equalize the voltage, thanks to which they do not allow the equipment to fail even with significant current surges. UPS with double conversion suitable for servers, boilers and heating boilers, refrigerators, etc. This is an ideal option for devices and appliances that are sensitive to voltage quality, as they are able to regulate it in a fairly large range.
Advantages of UPS On-line
Such uninterruptible power supplies work continuously. Their principle of operation is that they stabilize the current indicators to the standard of 220V, regardless of the voltage at the input. So, the alternating current that enters the uninterruptible power supply turns into direct current, the indicators are adjusted to ideal values and are again transformed into an alternating current type.
In addition, continuous action models have other advantages. In particular, they know how to diagnose the current frequency, and are also capable of filtering network interference. As we have already mentioned above, such surge protectors are capable of equalizing voltage indicators in a fairly wide range of oscillations. Thanks to this, they are suitable for installation in places with frequent and significant voltage surges in the electrical network.
Of course, the disadvantages of uninterruptible power supplies with double current conversion are also present. So, since the models are equipped with high-power stabilizers, such UPSs are characterized by fairly high heat release rates. And they consume more energy compared to other types of UPS. A high level of heat generation requires careful selection of the installation site and good cooling. Also, from the minuses, it is possible to single out a higher cost compared to other types of uninterruptible power supplies. However, this is balanced by a large number of advantages of such models.
Technical parameters of the uninterruptible power supply
So, UPS of this type, like other models, differ in power. Devices with a peak load of up to 1 kW are available for selection — such devices are suitable for equipment with low and medium power consumption. Models with indicators of 1-10 kW are useful for high-power equipment. In general, the choice of power depends on two things:
- energy consumption of the connected load;
- amount of connected equipment.
The power of all devices must be summed up and 20-30% added to the result for a reserve: so it will be possible to connect something else if necessary, and in general avoid the risk of overloading the uninterruptible power supply.
What is also important is the voltage range that can be regulated by the UPS. The stronger the fluctuations, the wider the range needed.
Autonomy is also one of the important characteristics of online models. Depending on the battery built into the device, it can work for 3, 5 or 8 minutes, or even more.
The number of sockets is another important parameter. The UPS can have 1-11 pieces of them. How much is needed depends on the number of devices.
There is also a difference in the type of performance. Yes, there are classic options for installation on the floor or table, as well as rack models. The latter are intended for installation in server racks / cabinets.
Uninterruptible power supplies of the online type differ in functionality. As a rule, smart models have the largest set of functions. Such devices are equipped with cold start support, their batteries are protected against deep discharge. And these models also save electricity. UPSs are often equipped with displays that display the network status and operating mode. There are options with sound indication and fault monitoring.
UPS with continuous action is an ideal option for equipment with starter motors, as well as devices sensitive to voltage fluctuations. Such models are suitable for installation in places where the voltage quality leaves much to be desired.
