The Oracle PCA can operate effectively over a wide range of voltages and frequencies. However, it must have a reliable power source. Damage might occur if the ranges are exceeded. Electrical disturbances such as the following might damage the system:
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 your system 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.
Each rack has two pre-installed power distribution units (PDUs). The PDUs accept different power sources. You must specify the type of PDU that is correct for your data center.
Table 2.4 lists the PDU low-voltage requirements.
Table 2.4 PDU Requirements for Low Voltage
Item | ||
|---|---|---|
Size | 22 kVA | 24 kVA |
Market Part Number | 7100873 | 6444A |
Manufacturing Part Number | 7018123 | 594-5596-01 |
Input Voltage Range | 200-240 VAC | 190-220 VAC |
Number of Input Cords per PDU | 3 | 2 |
Electrical Input Ratings | 3x 1ph. [2W+ground] 208VAC 50/60Hz, max. 36.8A per phase | 2x 3ph. [3W+ground] 208VAC 50/60Hz, max. 34.6A per phase |
Data Center Receptacle | Hubbell CS8265C | IEC309-3P4W-IP67 (60A, 250V, AC, 3ph) IEC309 60A 3ph 4 Wire Hubbell HBL460R/C9W or equivalent |
Number of Outlets Per Rack | 6 | 4 |
Table 2.5 lists the PDU high-voltage requirements.
Table 2.5 PDU Requirements for High Voltage
Item | ||
|---|---|---|
Size | 22 kVA | 24 kVA |
Market Part Number | 7100874 | 6445A |
Manufacturing Part Number | 7018124 | 594-5600-01 |
Input Voltage Range | 220-240 VAC | 380-415 VAC |
Number of Input Cords per PDU | 3 | 2 |
Electrical Input Ratings | 3x 1ph. [2W+ground] 230VAC 50/60Hz, max. 32A per phase | 2x 3ph. [4W+ground] 230/400VAC 50/60Hz, max. 18A per phase |
Data Center Receptacle | Hubbell CS8265C | IEC309-4P5W-IP44 (32A, 400V, AC, 3ph) IEC309 32A 3ph 5 Wire Hubbell HBL532R/C9W or equivalent |
Number of Outlets Per Rack | 6 | 4 |
Electrical work and installations must comply with applicable local, state, or national electrical codes. Contact your facilities manager or qualified electrician to determine what type of power is supplied to the building.
To prevent catastrophic failures, design the input power sources to ensure adequate power is provided to the power distribution units (PDUs). Use dedicated AC breaker panels for all power circuits that supply power to the PDU. When planning for power distribution requirements, balance the power load between available AC supply branch circuits. In the United States and Canada, ensure that the overall system AC input current load does not exceed 80 percent of the branch circuit AC current rating.
PDU power cords are 4 meters (13.12 feet) long, and 1 to 1.5 meters (3.3 to 4.9 feet) of the cord will be routed within the rack cabinet. The installation site AC power receptacle must be within 2 meters (6.6 feet) of the rack.
To prevent catastrophic failures, the design of your power system must ensure that adequate power is provided to all of the compute nodes. Use dedicated AC breaker panels for all power circuits that supply power to the compute nodes. Electrical work and installations must comply with applicable local, state, or national electrical codes. Compute nodes require electrical circuits to be grounded to the Earth.
In addition to circuit breakers, provide a stable power source, such as an uninterruptable power supply (UPS) to reduce the possibility of component failures. If computer equipment is subjected to repeated power interruptions and fluctuations, then it is susceptible to a higher rate of component failure.
Circuit breakers are supplied by the customer. One circuit breaker is required for each power cord.
The cabinets for the Oracle PCA are shipped with grounding-type power cords (three-wire). Always connect the cords to grounded power outlets. Because different grounding methods are used, depending on location, check the grounding type, and refer to documentation, such as IEC documents, for the correct grounding method. Ensure that the facility administrator or qualified electrical engineer verifies the grounding method for the building, and performs the grounding work.