4. Undervoltage (line interactive and on-line solutions)
Reduced supply voltage lasting from minutes to days. Typically occurs when supply
network is overloaded. Can lead to computers behaving unpredictably.
5. Overvoltage (line interactive and on-line solutions)
Increased supply voltage lasting from minutes to days. Often triggered by rapid
reductions in power demands, overvoltage can damage hardware.
Typical usage line interactive UPS solutions (power problems 1-5)
PCs
Servers
Telecom Switches
Routers / Hubs
6. Electrical noise (on-line solutions)
‘Interference’ typically from radio transmitters, welding equipment etc.
Noise can cause hard-to-find intermittent problems.
7. Frequency variation (on-line solutions)
Changes in supply frequency, usually only found on supplies from generators.
8. Switching transient (on-line solutions)
Instantaneous undervoltage, typically lasting a few seconds.
9. Harmonic distortion (on-line solutions)
Reduced supply voltage lasting from minutes to days .Typically occurs when supply
network is overloaded. Can lead to computers behaving unpredictably.
Typical usage of Double Conversion (on-line) UPS solutions (power problems 1-9)
Mission critical applications
Servers
Call Centres
Data Centres
Storage
Emergency Lighting
Medical Equipment