HP Modular Cooling System manual Voltage fluctuations and outages

Figure 16: Raised floor grounding

Voltage fluctuations and outages

The MCS 5042 is designed 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 HP equipment:

•Dedicated power source—Isolates the 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 must be considered if outages of one-half cycle or more are common. For more information, consult a qualified contractor or consultant, as necessary.

The MCS 5042 can be protected from the sources of many electrical disturbances by using:

•An isolated power distribution system

•Power conditioning equipment

•Over-voltage and under-voltage detection and protection circuits

•Shielding to attenuate higher frequency radiated electrical energy

•Surge protective devices on power cables to protect equipment against electrical storms

26