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UPS Knowledge
9 Power Problems and Their UPS Solutions
- 2019-06-18 17:43:13
- admin
| No | Power Problem | Definition | Cause and Results | UPS Solution |
| 1 | Power Outage | A total loss of utility power | Can be caused by a number of events: lightning strikes, downed power lines, grid over-demands, accidents and natural disasters. |
Standby Line-interactive Online |
| 2 | Power Sag | Short term low voltage | Triggered by the startup of large loads, utility switching, utility equipment failure, lightning and power service that’s too small for the demand. In addition to the crashes, sags can damage hardware |
Standby Line-interactive Online |
| 3 | Power Surge | Short term high voltage | With voltages above 110% of nominal, surges can be triggered by a rapid reduction in power loads, heavy equipment being turned off, or by utility switching. The results can potentially damage hardware. |
Standby Line-interactive Online |
| 4 | Brownout | Reduced line voltage for extended periods of a few minutes to a few days | Can be caused by intentional utility voltage reduction to conserve power during peak demand periods or other heavy loads that exceed supply capacity |
Line-interactive Online |
| 5 | Electrical Line Noise High frequency |
Waveform
that piggybacks on the line waveform |
Can be caused by either RFI or EMI interference generated by transmitters, welding devices, SCR driven printers, lightning, etc |
Line-interactive Online |
| 6 | High Voltage Spike |
Instant
and dramatic increase in line voltage |
Can be caused by lightning strikes and can send line voltages to levels in excess of 6,000 volts. A spike almost always results in data loss or hardware damage to unprotected systems | Online |
| 7 | Frequency Variation |
A
change in frequency stability |
Resulting
from generator or small co-generation sites being loaded and unloaded. Frequency loss, system crashes and equipment damage. |
Online |
| 8 | Switching Transient |
Instantaneous high voltage increase impressed on the power line waveform |
Normal duration is shorter than a spike and generally falls in the range of nanoseconds. | Online |
| 9 | Harmonic Distortion |
Distortion
of the normal line waveform, generally transmitted by nonlinear loads. |
Switch-mode power supplies, variable speed motors and drives, copiers and fax machines are examples of nonlinear loads. Harmonic distortion can cause communication errors, overheating and hardware damage. | Online |
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Email: enquiry@scupower.com
Address: Bldg.14&15, No.319, Xiangjiang Street,Hi-Tech Zone, Shijiazhuang,Hebei, China (050035)
