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 |
| 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.
