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Power, electrical, and controls
Site electrical system
To ensure a complete and safe integration of the HP POD solution with your facility, HP requires that you complete the following actions for the installed electrical system prior to the installation of the HP POD solution:
• Short circuit analysis
• Arc flash study
• Circuit breaker coordination study
These actions must be performed for all associated parts of the electrical power train. The majority of the details and factors required to complete these studies are associated with the existing installed facility infrastructure.
CAUTION: Failure to complete these studies can cause serious issues with the electrical integration of the POD into your electrical system.
Power safety
WARNING: To avoid the risk of personal injury or loss of life, all personnel must comply with PPE requirements when opening or working inside areas of the HP POD 40c G2 that are marked as hazardous voltage, per NFPA 70E in accordance with NEC (NA) and IEC (EMEA and APJ).
Grounding
WARNING: To avoid the risk of personal injury or electric shock, the HP POD 40c G2 must be properly grounded per NFPA 70 in accordance with NEC (NA) and IEC (EMEA and APJ).
The HP POD 40c G2 must be properly grounded to the earth to ensure a common return path for electric current, limit the build-up of static electricity, and absorb an unlimited amount of current without changing its potential. To properly ground the HP POD 40c G2 to the earth, you must connect the POD to building steel, a ground rod, or a properly installed ground well that is connected to a building’s grounding system. The grounding electrode conductor connection point is located on the cold aisle side adjacent to the power cabinet.
Power, electrical, and controls 22
A certified electrician must test and verify that the HP POD 40c G2 is properly grounded.
Lightning protection
The HP POD 40c G2 structure and internal components are all bonded together. A common Grounding
Electrode Conductor Connection point is provided. Proper bonding and grounding of the HP POD 40c G2 minimizes the effects of a lightning strike. A surge protection device is provided on the HP POD 40c G2 input connection to protect the HP POD 40c G2 electrical system from voltage transients. If your site is in an area that is subject to frequent lightning strikes, the HP POD 40c G2 must be protected in accordance with NFPA
70 (NA) and IEC (EMEA and APJ). HP recommends that you contact a certified lightning protection consultant.
Power, electrical, and controls 23
Capacities
HP POD 40c G2 capacity limitations
The capacity limitations for the HP POD 40c G2 are separated into two categories: electrical power and mechanical cooling capacities. Both of these categories are interdependent and must be considered in conjunction with the overall customer requirements.
Electrical and mechanical cooling capacities
Feature
Critical IT electrical connections
Specification
2 x 800A feeders at 415Y/240 V, 3-phase, 4-wire, with equipment ground conductors
10.2 x 10.2 cm (4 x 4 in) conduit fittings per feeder provided
2N Redundant—576 kW Critical IT power capacity
Mechanical cooling electrical connections
Not applicable
Power for the cooling system fans comes from house power.
Mechanical cooling capacity
• N+1 Redundant—400 kW
• Non-redundant—600 kW
Power feeders
IMPORTANT: A licensed electrician must connect the power according to all local and national electrical codes, and must comply with manufacturer specifications.
The HP POD 40c G2 has eight power feeder couplings that provide the entrance for power to the POD. The power feeders route into the top of each electrical panel on the end of the HP POD 40c G2.
Power, electrical, and controls 24
Top view shown
The top of each electrical panel has four 10.16 cm (4 in) welded couplings where the power feeders are connected.
Power feeders are sized in accordance with NEC and IEC regulations.
Electrical panels
WARNING: To avoid the risk of personal injury or loss of life, all personnel must comply with PPE requirements when opening or working inside areas of the HP POD 40c G2 that are marked as hazardous voltage, per NFPA 70E in accordance with NEC (NA) and IEC (EMEA and APJ).
WARNING: To avoid the risk of personal injury or loss of life, all personnel must comply with electrical warning labels when operating and maintaining the electrical panels and systems of the
HP POD 40c G2.
For the external electrical power component locations, see "Electrical power component identification (on
Main breaker locations
Power, electrical, and controls 25
Front view shown
Arc flash safety
The customer must complete an arc flash assessment of the HP POD 40c G2 and the associated electrical supply system for operation, maintenance, and so on.
Power distribution: Electrical busway system
The rack power distribution system for the HP POD 40c G2 is protected by electrical circuit breakers located on the end of the HP POD 40c G2.
End view shown
Feature
Number of busways
Specification
8
Power, electrical, and controls 26
Feature
Frequency
Amps (per busway)
Voltage (per busway)
Grounding
Busway conductors
Specification
60 Hz
200 A
415 V
Copper
3-phase + neutral + equipment ground
Panel schedules
The panel schedule for each electrical panel is permanently affixed to the inside cabinet door of each electrical panel.
Wire color code
IMPORTANT: UL-approved colored tape over another color of wire is only acceptable on wire sizes #2 and larger.
120 V wiring system—Power required for the transformer in the control cabinets
Wire color Description
Black Single-phase current carrying conductor
White
Green or green and yellow
Neutral
• Equipment grounding conductor
• Bonding conductor
• Earth ground
415 V wiring system—Power required for the electrical busway feeders
Wire color Description
Brown and violet A Phase/L1
Orange and violet
Yellow and violet
White and violet
Green or green and yellow
B Phase/L2
C Phase/L3
Neutral
• Equipment grounding conductor
• Bonding conductor
• Earth ground
Power, electrical, and controls 27
Control cabinet power components
Item
1
2
3
4
Component
VESDA power supply and battery backup
Customer connection box
ECS modules and relays
EPO controller board and house panel fuses
Dual power supplies with battery backup
Battery backup power supply
Description
Provides power to the VESDA as well as backup power during a power failure
Controls and organizes information monitored by the HP POD
40c G2 security components
Relays for the ECS control, ECS communications, I/O connections and terminal block connections
Connections for the EPO system and fuses for other house panel components
Provides 24 V DC power to the PLC and ECS systems
Provides 24 V DC power to the PLC and ECS systems
5
6
Electrical busways
The electrical busway is a modular, overhead electrical distribution system that supplies power to the HP POD
40c G2 IT loads. The HP POD 40c G2 includes eight busways, and each busway can support 200 A.
Power, electrical, and controls 28
Top view shown
The HP POD 40c G2 electrical busways can be configured for non-redundant power or redundant power.
The HP POD 40c G2 can be installed as a single source 1N load by providing all required feeders from one common power source and from common switchboards and transformers. A 2N redundancy installation is configured by feeding the parallel power paths from independent power sources, switchboards, and transformers.
• Non-redundant power installation (1N load)—All eight busways are powered from the same power feed.
Power, electrical, and controls 29
• Redundant power installation (2N load)—Four busways are powered from one power feed, and the remaining four busways are powered from a different power feed.
Drop boxes
The internal electrical busways provide a location to connect each of the drop boxes, which then power the
PDUs. Stagger the drop boxes on the electrical busways by connecting one drop box to busway #1 and connecting the next drop box to busway #2. A staggered configuration enables load balancing with the rack equipment and is necessary to ensure redundancy.
Side view shown
Disabling power
• To disable power to a single PDU, open the drop box breaker that powers the PDU, and then disconnect the PDU from the drop box.
• To disable power to a single rack, open the drop box breakers that power each of the PDUs installed in that rack.
• To disable power to a single busway, open the appropriate breaker for that busway on the corresponding electrical busway panel on the HP POD 40c G2 exterior.
Power, electrical, and controls 30
• To disable power to all racks, open the breaker for each busway on the corresponding electrical panel on the HP POD 40c G2 exterior.
Power configurations
IMPORTANT: Different PDUs can alter the average power capacity per rack.
Configuration Number of 3-phase
PDUs per HP POD
40c G2
Number of drop boxes per HP POD
40c G2
Average power capacity per rack
Total HP POD 40c
G2 power capacity
Non-redundant 40 24 30
Redundant 40 24 20
*The HP POD 40c G2 is mechanically cooling limited to N=600 kW / N+1=400 kW
600 kW*
400 kW*
Rack power
Power is provided to each rack by PDUs and drop boxes. The PDUs are powered by the drop boxes attached to each electrical busway. For more information about electrical busway drop boxes, see the HP
Performance Optimized Datacenter 40c G2 Maintenance and Service Guide.
Feature Specification
Rack type
Max number of racks
Max U space per rack
HP POD 40c G2 rack
20
50U
1,000U Max U space per HP POD 40c G2
Server capacity
Average capacity per rack
Peak capacity per rack
600 kW power capacity
30 kW
69 kW
240 V Voltage to rack
Rack configuration
Total number of PDUs
Max power per PDU
Redundant/non-redundant capabilities
40 (two per rack)
30 A = 17 kW; 60 A = 34 kW
Max load (chilled POD cooling mode) * 600 kW
Airflow per rack (chilled POD cooling mode)
* Dependent on configuration
2,000 CFM average
HP POD 40c G2 lighting
The HP POD 40c G2 includes eight LED lights. Four lights are located in the cold aisle and four lights are located in the hot aisle.
A light switch is located at every personnel door. For more information on light switch locations, see "Life
safety component identification (on page 9 )."
Power, electrical, and controls 31
All emergency lights are tied to the battery backup power, keeping the interior of the HP POD 40c G2 illuminated during a power outage or emergency.
For more information about the LED lights, see the HP Performance Optimized Datacenter 40c G2
Maintenance and Service Guide.
Power, electrical, and controls 32
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