3 Phase PDU Solutions

Nearly all power in the world today is generated as 3-Phase. It is the most efficient way to produce and distribute electricity. 3 Phase power is used in data centers to support high density IT applications and minimize the cost of the cables delivering that power. One of the early challenges of three phase power was load balancing. In the past, this meant carefully dividing power evenly across the three branches of the rack PDU so that you could draw roughly similar current on each branch. Now, Server Technology offers 3 Phase PDUs with Alternating Phase. This allows for power to be phased on a per-outlet basis instead of a per-branch basis.

3 Phase Power Distribution
in the Data Center
3 Phase Power in the Data Center White Paper

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Why use a Server Technology 3-Phase PDU with Alternating Phase:

  • Alternate phased power on a per-outlet basis instead of per-branch basis
  • Simplified cable management
  • Better airflow
  • Less heat meaning lower cooling costs
  • Net improvement of PUE
  • Simplified load balancing and greater efficiencies

Why Load Balancing?

  • If the three phases are not balanced, heat is generated resulting in higher cooling costs
  • Unbalanced Loads lead to inefficiency and higher power bills
  • High loads on a single phase means greater chance of tripping either a PDU or upstream breaker, and losing power at the rack

  • Alt Phase Technology

    Easy Load Balancing

    Choose Alternating Phase
    Alternating phase outlets alternate the phased power on a per-outlet basis instead of a per-branch basis. This allows for shorter cords, quicker installation and easier load balancing for 3-phase rackmount PDUs.

    Read the Alt Phase Executive Summary
  • High Density Outlet Technology with Cx outlets icon

    Ultimate Flexibility

    Introducing the HDOT Cx
    The Cx outlet is the ultimate in flexibility, a C13 and C19 combined into one outlet. With no additional parts, a C14 or a C20 cable can be plugged into the Cx outlet.

    Download the HDOT Cx Flyer
  • Need a rack PDU tailored to your data center?

    Moving into 3-phase?
    View Switched PDUs
    View Smart PDUs
    Build Your Own HDOT Cx PDU

A New Look at 3-Phase Power Distribution in the Data Center


Alt Phase Technology
Three phase power is used in data centers to support high density IT applications and minimize the cost of the cables delivering that power.
This paper discusses the importance of load balancing across phases, and how using PDUs having alternating phase outlets simplifies the load balancing process.

Simplify 3-phase power load balancing with Alternating Phase Technology. Read the executive summary today.

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About Server Technology

Server Technology's power strategy experts are trusted to provide Rack PDU solutions for demanding data centers worldwide ranging from small technology startups to Fortune 100 powerhouses. Because power is all we do, you will find us in the best cloud and co-location providers, forward thinking labs and telecommunications operations. Server Technology customers consistently rank us as providing the highest quality PDU's, the best customer support and most valuable innovation. Let us show you; we have over 12,000 PDU configurations to fit every data center need. Only with Server Technology will customers Stay Powered, Be Supported and Get Ahead.
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