UNDERGROUND T&D SOLUTIONS USAmp Prime Insulated Cable Ampacity Software Product Overview USAmp Prime software models all types of underground power cables (pipe-type, extruded, and solid paper). Computes steady-state and transient ampacities and temperatures for multiple cables with equal or unequal loading. Models duct banks, pipe cables, extruded cables, directly buried cables, casings, or mixtures thereof. Models steam lines or other extraneous heat sources. Models aerial cable installations with enhanced pictorial interface. Computes short-circuit rating of conductors, shields, and armor. Installation with a duct bank and a casing Operation The user selects an empty installation (a cable-free “container”), such as a duct bank, backfill, or casing, and places it at a specified location below the earth’s surface. The user may place multiple such containers. Cables are inserted into the container ducts by double clicking the mouse over an empty duct and choosing a cable from a pre-defined cable library or by creating a new cable. The user can then make a choice of adding the cable as a single-phase, three-phase, or multiple-cable-per-phase circuit. The inserted circuit can also be configured by specifying the type of transposition and sheath bonding (single-end, multiple-end, or cross-bonded). The cable locations are changed through simple drag-and-drop. An external heat source (such as a steam line) can be placed in the installation and the steam temperature or the heat loss is specified. The earth thermal resistivity and ambient temperature are entered into the program with the option of iterating between multiple values. Computation specification form The ampacities of the installation cables can be computed simultaneously for steady-state or transient conditions. For steady-state conditions, the load temperature or current is specified. For transients, inputs include the time period, pre-load temperature or current, and load temperature or current. Multiple steady-state computations and transient computations are allowed. Report showing input and output Features Completely redesigned graphical user interface; “What you see is what you get”: all installation and cable graphics are to scale (including the multiple layers in a cable); Export report showing outputs and inputs into Adobe PDF, Microsoft® EXCEL©, or Microsoft® Word©; AEIC cable specifications are built into the program; Many cables may be rated simultaneously; Short-circuit ratings of conductors, shields, and armor; In-air cable ratings; Switch between metric and English units. Cable design form (to scale) Input of cable designs is facilitated by a cable “expert system”. The AEIC cable specifications are “built-in” to the program. The user inputs basic parameters (cable type, insulation type, voltage rating and conductor area). Then the program retrieves the standard dimensional features and calculation constants for the cable and displays them. They may be edited “on-screen” to accommodate “non-standard” features Short-circuit analysis form Methodology The program is compliant with the IEC 60287 standard for the steady-state ratings and IEC 60853 for the transient ratings. Furthermore, IEC 60949 is used for short-circuit ratings. Cable print form (to scale) Aerial ratings form FOR MORE INFORMATION A free demo package of USAmp Prime software is available upon request. Contact USi for more information and pricing.