HP rp5400 Site Preparation Guide - rp5400 - Page 11

Power Consumption, Electrical Load Requirements Circuit Breaker Sizing, Power Quality

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General Site Preparation Guidelines Electrical Factors The minimum recommended illumination level is 70 foot-candles (756 lumens per square meter) when the light level is measured at 30 inches (76.2 cm) above the floor. Power Consumption When determining power requirements, you must consider any peripheral equipment that will be installed during initial installation or as a later update. Refer to the applicable documentation for such devices to determine the power required to support these devices. Electrical Load Requirements (Circuit Breaker Sizing) NOTE Local authority has jurisdiction [LAHJ] and should make the final decision regarding adherence to country- specific electrical codes and guidelines. It is good practice to derate power distribution systems for one or more of the following reasons: • To avoid nuisance tripping from load shifts or power transients, circuit protection devices should never be run above 80% of their root-mean-square (RMS) current ratings. • Safety agencies derate most power connectors to 80% of their RMS current ratings. Power Quality The hp server is designed to operate over a wide range of voltages and frequencies. The server is tested and shown to comply with EMC Specification EN50082. However, damage can occur if these ranges are exceeded. Severe electrical disturbances can exceed the design specifications of the equipment. 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 Chapter 1 3

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Chapter 1
General Site Preparation Guidelines
Electrical Factors
3
The minimum recommended illumination level is 70 foot-candles (756 lumens per square meter) when the
light level is measured at 30 inches (76.2 cm) above the floor.
Power Consumption
When determining power requirements, you must consider any peripheral equipment that will be installed
during initial installation or as a later update. Refer to the applicable documentation for such devices to
determine the power required to support these devices.
Electrical Load Requirements (Circuit Breaker Sizing)
NOTE
Local authority has jurisdiction [LAHJ] and should make the final decision regarding
adherence to country- specific electrical codes and guidelines.
It is good practice to derate power distribution systems for one or more of the following reasons:
•
To avoid nuisance tripping from load shifts or power transients, circuit protection devices should never be
run above 80% of their root-mean-square (RMS) current ratings.
•
Safety agencies derate most power connectors to 80% of their RMS current ratings.
Power Quality
The hp server is designed to operate over a wide range of voltages and frequencies. The server is tested and
shown to comply with EMC Specification EN50082. However, damage can occur if these ranges are exceeded.
Severe electrical disturbances can exceed the design specifications of the equipment.
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