Provides the highest level of protection against all power disturbances (noise, spikes, frequency shifts), but is more expensive and slightly less energy-efficient due to constant double conversion. Summary Comparison Table Off-line (Standby) Line-Interactive On-line (Double Conv.) Transfer Time 0 ms Voltage Regulation None (only on battery) Basic (via AVR) Perfect (constant) Best Use Case Home computers Small offices, workstations Servers, data centers Cost
An evolution of the standby UPS, often used for small office networks. shemy raboty ibp
Low cost and high efficiency, but features a short "switching delay" (typically 4–10 ms) and no voltage regulation in normal mode. 2. Line-Interactive Scheme Provides the highest level of protection against all
Because the inverter is always active, there is zero transfer time when the power fails. Incoming AC power is immediately converted to DC
The UPS passes utility power directly to the connected equipment while simultaneously charging the battery.
Incoming AC power is immediately converted to DC (rectifier) and then back to perfect AC (inverter). The load is always powered by the inverter.
Activates when utility power fails completely or fluctuates beyond the AVR's corrective range.
Provides the highest level of protection against all power disturbances (noise, spikes, frequency shifts), but is more expensive and slightly less energy-efficient due to constant double conversion. Summary Comparison Table Off-line (Standby) Line-Interactive On-line (Double Conv.) Transfer Time 0 ms Voltage Regulation None (only on battery) Basic (via AVR) Perfect (constant) Best Use Case Home computers Small offices, workstations Servers, data centers Cost
An evolution of the standby UPS, often used for small office networks.
Low cost and high efficiency, but features a short "switching delay" (typically 4–10 ms) and no voltage regulation in normal mode. 2. Line-Interactive Scheme
Because the inverter is always active, there is zero transfer time when the power fails.
The UPS passes utility power directly to the connected equipment while simultaneously charging the battery.
Incoming AC power is immediately converted to DC (rectifier) and then back to perfect AC (inverter). The load is always powered by the inverter.
Activates when utility power fails completely or fluctuates beyond the AVR's corrective range.