Pipe-Type Cable

 Name for Identification

Text

Optional text parameter for identification of the component.

Placement in Relation to Ground Plane

Choice

Choose whether this cable is placed above (Aerial) or below (Underground) the ground plane.

Depth Below Ground Surface

REAL

Literal

Enter the depth of the pipe centre-point below the earth surface [m]. The y-coordinate of all coax cables included in this pipe must be relative to this depth.

Height Above Ground Surface

REAL

Literal

Enter the height of the cable centre above the ground plane surface [m]. The y-coordinate of all coax cables included in this pipe must be relative to this depth.

Horizontal Translation from Centre

REAL

Literal

Enter the translation of the pipe centre-point along the horizontal (x) axis [m]. This value is relative to a local x=0 point, which is derived given the position of all cables in this segment. The x-coordinate of all coax cables included in this pipe must be relative to this depth.

Number of Inner Cables

Choice

Select from 0 to 8.

This is the number of coax cables to be included within this pipe. Note that if 0 is chosen, then it is assumed to be an empty pipe.

Each Inner Cable Is

Choice

Indicate whether or not all inner cables are identical. This option can be used to simplify data entry.

Detailed Graphic Layers

Choice

Select show or hide.

Eliminate Pipe

Choice

Choose whether or not to mathematically eliminate the pipe conductor.

Pipe Outer Insulator Layer

Choice

Choose whether or not to include an insulating layer between the pipe and ground. Note that if no insulation layer is present, the conductor will be mathematically eliminated.

Pipe Number

Choice

Select 1 to 5.

This is a unique pipe number, used for sorting multiple pipes in the same right-of-way.

Loss Tangent is Defined At

REAL

Literal

Enter the frequency at which loss tangents are defined [Hz].

Outer Radius

REAL

Literal

Enter the outer radius of the corresponding conductor.

Relative Permittivity

REAL

Literal

Enter the relative permittivity of the corresponding insulator.

Relative Permeability

REAL

Literal

Enter the relative permeability of the corresponding insulator.

Resistivity

REAL

Literal

Enter the resistivity of the corresponding conductor or insulator [Wm].

 Cable Number

Choice

Select a number between 1 to 8.  This parameter is used for the numbering of multiple cables in the same right of way.

Distance from Pipe Centre to Cable Centre

REAL

Literal

Enter a value to represent the distance between the centre of this coax cable, and the centre of the encompassing pipe [m].

Angular Position of Cable Centre

REAL

Literal

Enter a value to represent the angular position of the centre of this coax cable, in relation to the origin [deg].

Layer Configuration

Choice

Select the configuration of the cable layers. C and I represent conducting and insulating layer respectively.

Layer Thickness is Specified As

Choice

Select the manner in which the layer thicknesses are specified. If radial from centre is selected, enter the distance from the centre-point to the outer radius of the layer.

Ideal Cross-Bonding/Transposition Is

Choice

Choose whether or not to enable or disable the ideal cross-bonding feature.

Cross-Bonding/Transposition Group

Choice

Select the group number to which this cable belongs. See Ideal Cross-Bonding for more details.

NOTE:

Each cable group defines a cross-bonded system of three cables. Each cable in the group should have the same set of cross-bonded conductors.  There can be multiple cross-bonded cable groups or a combination of cross-bonded and non cross-bonded cables (ex. a cable system with three cross-bonded and two non cross-bonded cables). Usually in a cross-bonded cable system, only sheaths are transposed at regular intervals. However (if required), any other conductor can also be be transposed.

In some applications, the inner conductor is transposed other than the sheath to obtain a balanced system. This can be accomplished by enabling cross-bonding/transposition of both inner conductor and sheath. In some practical applications, the sheaths at major section points (must consist of three cable sections) of the cross-bonded cable are connected to the ground. This can be approximated by mathematically eliminating the sheath of the three cables in the group (i.e. conductor layer elimination).

Transposition of Conducting Core/Layers

Choice

Use these options to specify which conductors are to be included in the cross-bonding. See Ideal Cross-Bonding for more details.

Conductors to Eliminate

Choice

Choose which conducting layers to eliminate (if any). Select none to disable conductor elimination. If specify is selected, then you must specify which conductors are to be eliminated in the following parameters.