Impulse protection.
Simply classic
APC Back-UPS CS 650VA BK650EI is a "classic" standby UPS, the functions of which are to give you the opportunity to save documents and calmly, without haste, turn off the computer if there is a power outage. For these purposes, the uninterruptible power supply has a battery pack "on board" in the form of a single battery with a capacity of 9 Ah. According to the data specified in the operating instructions for this UPS, the device provides autonomous operation of a typical office computer with a 21 "monitor for 17 minutes. Despite the fact that the APC Back-UPS CS 650VA BK650EI is an uninterruptible backup type stabilizer), it copes well with power surges and sags. The manufacturer claims that this UPS can operate at a mains voltage of 160 - 278 V and a current frequency of 47 - 63 Hz. But it should be noted that such deviations from the norm have a bad effect on the battery condition Therefore, if your home or office electric current parameters do not correspond to the standard ones, then it is better to buy an interactive UPS right away.
The best option for backup power for office PCs
It is impossible to “plug” equipment with conventional plugs into this uninterruptible power supply. On its rear panel there are only "computer" sockets (connectors C13 / C14) with a total of 4 pieces. Three of them have battery support (can be used for backup power supply of electricity consumers), and one, which differs in color, does not have such a function (it can include an additional monitor or other equipment that can be dispensed with during a power outage). All 4 connectors protect connected computers and monitors from short circuits and surges of energy (protection against impulses up to 310 J is declared). The LAN connector is used as the control interface. This is very convenient for network administrators, because the UPS connects like a normal network device, and it can be quickly accessed from anywhere in the internal office network. Therefore, uninterruptible power supplies such as the APC Back-UPS CS 650VA BK650EI are especially suitable for providing autonomous operation of computers in large offices and institutions with dozens of UPSs scattered across different rooms and cabinets.
