HP Integrity rx8620 Site Preparation Manual page 22

General Site Preparation Guidelines
Electrical Factors
Sources of Voltage Fluctuations
Voltage fluctuations, sometimes called glitches, affect the quality of electrical power. Common sources of
these disturbances are:
• Fluctuations occurring within the facility's distribution system
• Utility service low-voltage conditions (such as sags or brownouts)
• Wide and rapid variations in input voltage levels
• Wide and rapid variations in input power frequency
• Electrical storms
• Large inductive sources (such as motors and welders)
• Faults in the distribution system wiring (such as loose connections)
• Microwave, radar, radio, or cell phone transmissions
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Chapter 2