NonStop NS14000 Planning Guide (H06.10+)

CAUTION: Be sure the hardware configuration and resultant power loads of each cabinet within
the system do not exceed the capacity of the branch circuit according to applicable electrical
codes and regulations.
NOTE: If your system includes the optional rackmounted HP R5500 XR UPS, the modular
cabinet will have one PDU located on the rear left side and four extension bars on the rear right
side. To provide redundancy, components are plugged into the left-side PDU and the extension
bars. Each extension bar is plugged into the UPS.
Branch circuit requirements vary by the input voltage and the local codes and applicable
regulations regarding maximum circuit and total distribution loading. Select circuit breaker
ratings according to local codes and any applicable regulations for the circuit capacity.
Enclosure AC Input
Enclosures (NonStop Blade Element, VIO enclosure, and so forth) require:
ValueSpecification
200/208/220/230/240 V ac RMSNominal input voltage
180-264 V acVoltage range*
50 or 60 HzNominal line frequency
47-53 Hz or 57-63 HzFrequency ranges
1Number of phases
* Voltage range for the VIO enclosure is 100-240 V ac, and for the maintenance switch is 200-240 V ac.
Each PDU is wired to distribute the load segments to its receptacles. Refer to “Power Distribution
Units (PDUs)” (page 52). Factory-installed enclosures are connected to the PDUs for a balanced
load among the load segments.
CAUTION: If you are installing Integrity NonStop NS14000 system enclosures in a modular
cabinet, balance the current load among the available load segments. Using only one of the
available load segments, especially for larger systems, can cause unbalanced loading and might
violate applicable electrical codes. Connecting the two power plugs from an enclosure to the
same load segment causes failure of the hardware if that load segment fails.
Enclosure Power Loads
The total power and current load for each modular cabinet depends on the number and type of
enclosures installed in it. Therefore, the total load is the sum of the loads for all enclosures
installed. For examples of calculating the power and current load for various enclosure
combinations, refer to “Calculating Specifications for Enclosure Combinations” (page 32).
In normal operation, the AC power is split equally between the two PDUs in the modular cabinet.
However, if one of the two AC power feeds fails, the remaining AC power feed and PDU must
carry the power for all enclosures in that cabinet.
26 System Installation Specifications