The Cable Interface component is used to identify and provide the number of electrical connections at each end of the transmission corridor (right of way). This component must be used along with the Cable Configuration component as described in Constructing Underground Cable Systems.
NOTE: Electrical connections to the interface are numbered from top to bottom, 1 being at the top.
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Cable Name |
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Text |
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Enter a name for this cable segment. This name must match both the corresponding Cable Configuration component, as well as the other interface component. |
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Number of Coaxial Cables |
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Choice |
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Select the total number of coaxial cables for this right of way (maximum 12) |
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Encompassing Pipe Conductor Is |
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Choice |
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Select not present or present (insulated from ground). If present is selected, it is assumed that all coaxial cables in this segment are encompassed within a conducting pipe. |
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Segment Specification |
Choice |
Select automatic, sending or receiving.
Select sending or receiving to designate the interface as either/or. Note that if one interface is specified as sending, the other must be specified as receiving or vice versa. Or, both can be selected as automatic.
This is very important when working with mutually coupled systems in remote-end mode, in order to ensure proper node/subsystem mapping and EMTDC runtime results. Specifying ends is not necessary for non-mutually coupled systems, but is recommended nonetheless.
Graphical indicators are provided as follows:
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Coaxial Cable # |
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Choice |
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Use this parameter to allow for external electrical connections to the concentric conductors in the corresponding cable.
Selections:
IMPORTANT: If option 2, 3 or 4 is selected, external electrical connections will appear on the cable interface component. Do not connect directly to ground (use a small series resistance between the cable and ground):
However, if you have selected to automatically ground these external connection through a resistor, you will not need to add components as shown above. See the parameters called Ground Sheaths/Armours/Outer Conductors with a Resistance and Sheaths/Armours/Outer Conductors Resistance below. |
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Sending Signal Dimension |
INTEGER |
Literal |
Enter the dimension of the optional, non-electrical signal to be transferred to the other end of the line. See Control Signal Carrier for more details. |
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Receiving Signal Dimension |
INTEGER |
Literal |
Enter the dimension of the optional, non-electrical signal to be received from the other end of the line. See Control Signal Carrier for more details. |
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Ground Sheaths/Armours/Outer Conductors with a Resistance |
Choice |
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Select Yes or No.
This parameter helps to alleviate clutter on the component graphic by automatically connecting a resistance to ground to either of the concentric conductors. In the past, this had to be done by connecting a resistor and ground directly on the schematic.
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Sheaths/Armours/Outer Conductors Resistance |
REAL |
Literal |
Enter the value of the resistance to be connected to ground [W]. |
