Tutorials

SafeGrid Earthing

Lightning Protection Module

The Lightning Protection Module in SafeGridTM allows the user to overlay lightning protection systems (LPS) such as lightning masts and earth wires over a PDF schematic. Using the Rolling Sphere Method (RSM), the Lightning Protection Module calculates the area protected by the masts and wires based on factors such as mast height, placement and the protection level used which determines the sphere radius. To access this module, open the SafeGridTM Earthing Software and select the Add-ons tab. Then, select the Lightning Protection Module.

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Fault Current Distribution Module

The touch and step voltages associated with an earthing system are directly proportional to the magnitude of the fault current flowing into and directly discharges into the soil by the earthing system. Therefore, it is important to determine how much of the fault current returns to remote sources via the cable screens or the overhead earth wires of the lines feeding the substation.

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Load Grid from DXF AutoCAD File

SafeGrid can model custom earthing arrangements of any size or shape in 2D or 3D. You can specify the grid using the in-built editor tools or you can import grids drawn in AutoCAD.

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PDF Underlay Tool Tutorial

The PDF underlay tool is an addon to the Display Results module of SafeGrid. This tool allows you to overlay the surface, touch or step voltage plots on your site drawings.

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Cable Pro Web

Protection Coordination Module

Downloads: Tutorial as PDF Table of Contents Introduction The Protection Coordination module in Cable Pro WebTM allows the user to conduct a protection coordination study

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Cable High Voltage

Cable Crossings Module

When circuits cross each other, each circuit acts as a heat source that influences the other cable’s ratings. The vertical distance between the crossing circuits and their relative crossing angle are important parameters that determine crossing ratings. Mutual heating between multiple buried cable circuits near one another are at a maximum when they are in parallel which therefore leaves their current ratings at a minimum. When circuits are at right angles to one another, the thermal interaction is at a minimum and thus the cable current ratings are at a maximum.

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Magnetic Fields Module

The Magnetic Fields module in Cable HV Software calculates the magnetic field intensity in micro Tesla µT occurring around a cable, circuit or a group of circuits. The calculations are based on the Biot-Savart law which explains the fundamental quantitative relationship between and electric current which is flowing and the magnetic field it produces.

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