There are several different types of power issues that threaten your critical IT infrastructure and any one of them could occur at any time without any prior warning. An UPS not only provides an uninterruptable power supply, it also provide various types of power protection. We will go through a several conditions and how they are caused and how the right UPS system can help prevent downtime and damage to your IT infrastructure.
Issue: Black Out or Loss of utility power
Cause: Can be caused by a number of events: lightning strikes, downed power lines, grid over-demands, accidents and natural disasters.
Issue: Short-term high voltage above 110 per cent of nominal
Cause: Can be caused by a lightning strike and can send line voltages to levels in excess of 6,000 volts. A spike almost always results in data loss or hardware damage.
Issue: Short-term low voltage
Cause: Triggered by the start-up of large loads, utility switching, utility equipment failure, lightning, and power service being insufficient to meet demand. In addition to causing equipment crashes, power sags can also damage hardware.
Issue: Reduced line voltage for periods ranging from a few minutes to a few days
Cause: Can be caused by an intentional utility voltage reduction to conserve power during peak demand periods or other heavy loads that exceed supply capacity
Issue: Increased line voltage for periods ranging from a few minutes to a few days
Cause: Triggered by a rapid reduction in power loads, heavy equipment being turned off, or by utility switching. Can result in damage to hardware.
Issue: High frequency waveform caused by EMI interference
Cause: Can be caused by either RFI or EMI interference generated by transmitters, welding devices, SCR driven printers, lightning, etc.
Issue: A change in frequency stability
Cause: Resulting from generator or small co-generation sites being loaded and unloaded. Frequency variation can cause erratic operation, data loss, system crashes and equipment damage.
Issue: Instantaneous under-voltage (notch)
Cause: Normal duration is shorter than a spike and generally falls in the range of nanoseconds.
Issue: Distortion of the normal line waveform, generally transmitted by nonlinear loads
Cause: Switch mode power supplies, variable speed motors and drives, copiers and fax machines are examples of non-linear loads. Can cause communication errors, overheating and hardware damage.