The ZDLRA Rack can operate effectively over a wide range of voltages and frequencies. However, each rack must have a reliable power source.

Damage may occur if the ranges are exceeded. Electrical disturbances such as the following may damage ZDLRA Rack:

• Fluctuations caused by brownouts
• Wide and rapid variations in input voltage levels or in input power frequency
• Electrical storms
• Faults in the distribution system, such as defective wiring

To protect ZDLRA Rack from such disturbances, you should have a dedicated power distribution system, power-conditioning equipment, as well as lightning arresters or power cables to protect from electrical storms.

• PDU Power Requirements
  Each ZDLRA Rack configuration contains two power distribution units (PDUs). Various PDUs are available to cater for different circumstances. Select the correct PDU for your data center and ZDLRA Rack configuration.
• Facility Power Requirements
  To prevent catastrophic failures, design the input power sources to ensure adequate power is provided to the PDUs.
• Circuit Breaker Requirements
  If computer equipment is subjected to repeated power interruptions and fluctuations, then it is susceptible to a higher rate of component failure.
• Electrical Grounding Guidelines
  The cabinets for ZDLRA Rack are shipped with grounding-type power cords.