If you make a change to an item or connection in your system, the single-line diagram will update automatically. Based on the existing asset and circuit information that you have already populated in the tool, the software automatically generates an always-accurate single-line diagram. However, new functionality in second-generation Data Center Infrastructure Management (DCIM) software dramatically simplifies and enhances single-line diagrams.ĭCIM software allows you to centrally track all your IT assets and supporting infrastructure equipment in a single pane of glass and map their relationships and dependencies. Get Automatically Generated, Dynamic, and Interactive Single-Line DiagramsĬreating and maintaining single-line diagrams is commonly a manual and time-consuming process. Maintaining safe operations to protect personnel Simplifying planning, troubleshooting, and increasing the efficiency of maintenance activitiesĮnsuring compliance with codes and regulations such as NFPA-70E Documenting redundant power paths to ensure system reliability.The benefits of using a single-line diagram in your data center include:īecoming familiar with your power distribution system layout and design The diagram should be kept accurate and updated as equipment in the facility is added, removed, or changed. DC bays that divide and distribute individual loads from the DC power plant to equipment downstream.Ī single-line diagram is used to depict the distribution of power through a facility.DC power plants that provide uninterrupted DC power.Floor power distribution units (PDUs) that transform raw power feeds into lower capacity feeds that feed into remote power panels or busways and rack PDUs.Uninterruptible power supply (UPS) units that provide emergency power during an outage until the power returns or a longer-term backup system turns on.Automatic transfer switches (ATS) that switch to a backup power source when there is an outage.Switchboards that divide and distribute power into branch circuits.Switchgears that control, protects, and isolates electrical equipment.Transformers that convert electrical power from one voltage or current to another voltage or current.Generators and fuel tanks that deliver backup power during an outage.The nodes of a data center’s single-line diagram typically include: What Equipment is Included in a Data Center’s Single-Line Diagram?Ī single-line diagram clearly shows the redundant power paths from the data center facility’s power source down to the floor power distribution units. The power source is displayed at the top of the diagram so that the power path can easily be followed downstream from node to node and redundant power paths can be visualized side-by-side.Īn example of a single-line diagram via Sunbird DCIM. Single-line diagrams use standard symbols for the different nodes of power systems. What Does a Single-Line Diagram Look Like? In a data center, a single-line diagram is used to visualize the power distribution system to improve planning and troubleshooting, ensure redundancy, and reduce potential outages. Symbols and lines are used to represent the nodes and connections in the system, and electrical characteristics may be included as well. What is Data Center Service Management (DCSM)?Ī single-line diagram (also known as an SLD or one-line diagram) is a simplified representation of an electrical system.What is the Federal Data Center Optimization Initiative (DCOI)?.Loads are specified in three-phase MW, line-to-line voltage and power factor. Transformers are specified in three-phase MVA, line-to-line transformation ratio, and per phase (equivalent star) impedance on one side. Note: Generators are specified in three-phase MVA, line-to-line voltage and per phase reactance (equivalent star). Load B : 40 MW, 6.6 kV, 0.85 lagging power factor.Load A : 15 MW, 11 kV, 0.9 lagging power factor.Transformer T 2 (3 phase): 15 MVA, 33/6.2 kV, X = 16 ohms per phase on high tension side.Transformer T 1 (3 phase) : 15 MVA, 33/11 kV, X = 15.2 ohms per phase on high tension side.The reactance data of the elements are given below the diagram. Figure 4.5 shows the single line diagram of simple power system. Circuit breakers are represented as rectangular blocks. Generator and transformer connections-star, delta, and neutral grounding are indicated by symbols drawn by the side of the representation of these elements. It is a convenient practical way of network representation rather than drawing the actual three-phase diagram which may indeed be quite cumbersome and confusing for a practical size power network.
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