Online UPS

Get Online UPS from 1kva to 4800 kva for industrial, commercial use.

In an onlineUPS, the batteries are always connected to the inverter, so it isn’t necessary to have a power transfer switch. When a loss of power occurs, the rectifier just drops out of the circuit and the batteries keep the flow of power steady and unchanged.

When the power is restored, the rectifier resumes carrying most of the load and also begins charging the batteries. However, the charging current may be limited to prevent the high-power rectifier from overheating the batteries and boiling off theelectrolyte. The most beneficial advantage of an on-line UPS, in comparison with the other types of UPS, is its ability to provide an “electrical firewall” between the incoming utility power and sensitive electronic equipment.

The online UPS is ideal for environments where electrical isolation is necessary or for equipment that is very sensitive to power fluctuations. However, with the advances in technology, the online UPS unit was once only used for very large installations of 10kWor more. Now they are available as a common consumer device, supplying 500 W or less.

The initial cost of the online UPS may be higher, but its total cost of ownership is generally lower due to longer battery life. The online UPS may be necessary when the power environment is “noisy”, when utility power sags, outages and other anomalies are frequent, when protection of sensitive IT equipment loads are required or when operation from an extended-run backupgeneratoris necessary.

The basic technology of the online UPS is the same as in the standby or line-interactive UPS. However, it typically costs much more, due to it having a much greater currentAC-to-DCbattery-charger/rectifier, and with the rectifier and inverter designed to run continuously with improved cooling systems. It is called a double-conversion UPS due to the rectifier directly driving the inverter, even when powered from normal AC current.