
Power Problems Defined
The following is a simple overview to the most common types of power problems and the levels of protection afforded by the different UPS technologies.
Power Problem
Standby/ Offline UPS
Line-Interactive
UPS On-Line Double
Conversion UPS
Conversion UPS
Power Failure
Yes
Yes
Yes
Power Sag
Yes
Yes
Yes
Mains Power Surge
Yes
Yes
Yes
Under-Voltage
No
Yes
Yes
Over-Voltage
No
Yes
Yes
Switching Transients
No
No
Yes
Line Noise
No
No
Yes
Frequency Variations
No
No
Yes
Harmonic Distortion
No
No
Yes
Please click here to transfer to our “UPS Technologies Explained” page.