Once a cable is configured, we recommend you determine the current rating, voltage drop and fault withstand in this order.
Common with all the sizing dialogues, the current capacity lets you know which cable you're working and the current cable configuration.
Also at the top of the page, you can change the cable CSA, and an information box provides feedback and recommendations on your entries. The information box uses a traffic light coloured border to indicate if the cable is adequately sized or not. Also, for sizing standards, the information box will give a recommended cable size.
Load details are entered as a cable current and power factor of 0.95. The correct phase configuration is selected from a drop down list. Available phase configurations depend on the selected cable. An info box gives the equivalent power delivered by the cable.
A protective device type and trip rating can be selected. These may affect the calculation of current rating, depending on the selected rating standard.
All cables have the option for a user-defined rating. This allows the user to fix the cable rating directly. If for example, the rating has been given or determined the rating outside of the application, it can be entered here.
While a user-defined rating can be used, in most instances a user will want some help in determining this. To do this, an appropriate sizing standard is selected. The available standards depend on selected cable and voltage.
Once a standard has been selected, the appropriate installation condition is input. Available installation conditions and the input required depends on the selected standard.
Temperatures and soil thermal resistivity are initially populated with the project default values. These can be changes as required
Clicking the update button to saves all the changes.