Site Preparation

Power Quality

Power Quality

This equipment is designed to operate over a wide range of voltages and frequencies. It has been 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 Electrical Disturbances

Electrical disturbances, 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

Power System Protection

Computer systems can be protected from the sources of many of these electrical disturbances by using:

A dedicated power distribution system

Power conditioning equipment

Over- and under-voltage detection and protection circuits

Screening to cancel out the effects of undesirable transmissions

Lightning arresters on power cables to protect equipment against electrical storms

Every precaution has been taken during power distribution system design to provide immunity to power outages of less than one cycle. However, testing cannot conclusively rule out loss of service. Therefore, adherence to the following guidelines provides the best possible performance of power distribution systems for server equipment:

Dedicated power source—Isolates server power distribution system from other circuits in the facility.

Missing-phase and low-voltage detectors—Shuts equipment down automatically when a severe power disruption occurs. For peripheral equipment, these devices are recommended but optional.

Online uninterruptible power supply (UPS)—Keeps input voltage to devices constant and should be considered if outages of one-half cycle or more are common. Refer to qualified contractors or consultants for each situation.

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Appendix C

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HP RP7405/7410 manual Power Quality, Sources of Electrical Disturbances, Power System Protection

RP7405/7410 specifications

The HP RP7405 and RP7410 are high-performance servers in the HP Integrity line, specifically designed for mission-critical applications. These servers are built on the Itanium architecture and showcase HP's commitment to reliability, scalability, and performance. Targeted primarily at the enterprise market, both models are ideal for data-intensive workloads, virtualization, and large databases.

One of the standout features of the RP7405 and RP7410 is their robust architecture. The servers utilize HP's NonStop technology, ensuring high availability and fault tolerance. This architecture is designed to provide continuous uptime, which is crucial for businesses dependent on uninterrupted access to their data and applications. The RP7405 supports up to 4 processors, while the RP7410 can accommodate up to 8 processors, allowing for enhanced compute power and the ability to handle increasingly demanding workloads.

In terms of memory, the RP7405 and RP7410 support significant RAM configurations, making them capable of handling large memory-intensive applications. They are equipped with advanced memory management technology, including ECC (Error-Correcting Code) memory, which helps to detect and correct data corruption, thereby enhancing system reliability.

The servers employ HP's Virtual Partition (vPars) technology, which allows for efficient server consolidation by enabling multiple virtual servers to operate on a single physical machine. This capability enhances resource utilization and simplifies management, thus reducing IT costs while maximizing performance.

HP's Serviceguard clustering software is integrated into both servers, offering enhanced availability through active-active clustering and failover capabilities. This software ensures that workloads can be seamlessly transitioned between servers in the event of hardware failures or maintenance, further minimizing downtime.

Security is also a paramount consideration with the HP RP7405 and RP7410. The servers come equipped with advanced security features, including secure boot, encryption, and an array of compliance certifications, ensuring that sensitive data is protected against unauthorized access.

Additionally, the servers support a wide range of operating systems, including HP-UX, which is optimized for the Itanium architecture. This flexibility allows organizations to choose the operating environment that best suits their application needs.

In conclusion, the HP RP7405 and RP7410 are powerful servers designed for high-performance applications in enterprise environments. With their advanced architecture, extensive memory support, virtualization capabilities, and robust security features, these servers stand out as reliable solutions for organizations seeking to enhance their IT infrastructure while ensuring high availability and performance.