Electric Line Segment

ElectricLineSegment is an abstract class that captures information about the configuration and connectivity of conductors. ElectricLineSegment objects are categorized by voltage and are either overhead or underground conductors.

ElectricLineSegment represents circuits often referred to as feeders. Primary conductors originate at a main distribution center and supply one or more substations. Secondary networks are supplied by five or more primary feeders to keep the transformer loading at 125 percent in the event of an outage. Capacitors reduce voltage drop along the feeder.

Feeder management systems are created to determine which circuit a given electrical device belongs to (i.e., which source or, in looped system, sources feed it with power), and which of its electrical phases are energized on the primary side. This information can be used to create circuit maps and visually distinguish among different feeder systems. The subtypes of these ElectricLineSegment objects are primary, secondary, single-phase, and three-phase.

ElectricLineSegment inherits attributes from the ElectricComplexEdge abstract class.

Associations: ElectricLine

Subtypes: None

Model Names: None

Attributes:

ElectricLineObjectID: long integer - Object ID of associated ElectricLine.

ElectricTraceWeight: long integer - Used by Feeder Manager to determine device status and other information that affects circuit connectivity. Feeder Manager requires that the MMELECTRICTRACEWEIGHT model name be assigned to this field.

FeederID: text - Feeder Manager identifier assigned to feeders and devices that participate in a specific distribution circuit. Feeder Manager uses the FEEDERID model name in this field.

FeederID2: text - Feeder Manager identifier assigned if device is supplied by second feeder. Feeder Manager uses the FEEDERID2 model name on this field.

FeederInfo: long integer - Feeder Manager-assigned phase information describing the phase of the circuit. Feeder Manager uses the FEEDERINFO model name on this field.

LabelText: text - Provides text for line annotation. The ArcFM Update Primary Conductor Text special and relationship autoupdaters both use the LABELTEXT model name on this field.

NeutralMaterial: text - Material of neutral wire; domain values include All, Aluminum Conductor, Copper, etc.

NeutralSize: text - Size of neutral wire; domain values include 1/0 AWG, 1000 Concentric Neutral, etc.

NominalVoltage: long integer - Code indicating system voltage; domain values include 7.2 kV Grounded Y, 24.9 kV Grounded Y, 2400 Delta, etc. The ArcFM Inherit Nominal Voltage autoupdater uses the NOMINALVOLTAGE model name on this field.

OperatingVoltage: long integer - Code indicating standard level at which system is currently being operated that may vary above or below nominal voltage; domain values include 120 volts, 480 volts, etc. Feeder Manager and Electric Tracing use the OPERATINGVOLTAGE model name on this field. Structural Analysis uses the OPERATINGVOLTAGE model name on this field for overhead conductors.

PhaseDesignation: long integer - Code indicating phases present; domain values include A, AB, AC, etc. A significant number of ArcFM tools require that this field have the PHASEDESIGNATION model name assigned. Because a large amount of functionality relies on this model name it should always be assigned. Below are a few examples of the tools that require the PHASEDESIGNATION field model name.

Conduit Manager - Requires this model name if you wish to place different phases of a single conductor in different ducts.
Structural Analysis - Requires this model name on overhead conductor features.
Feeder Manager/Electric Tracing - Requires this model name if you wish to trace with respect to conductor phasing.
QA Validation Rules - The Phase of Bank Unit and Phase on Transformer Bank validation rules require this model name.
Phase Swap - Requires this model name in order to identify the field that holds the phasing information.

International Data Model

In addition to the attributes listed above, the following attributes are used by the international electric data model.

CapacityToGround - The capacitive reactance to neutral or earth of any line segment (ohms per map unit length)

ConductorMaterial - Material of which the conductor is made

ConductorSize - Size of the conductor

ConnectionOKIndicator - Indicates whether a line segment is capable of and ready for connection to a load or other line segment

InsulationType - Insulation type of conductor

InsulationVoltage - Withstand voltage of the conductor's insulation (Volts)

MaxContinousCurrent - Continuous current rating of conductor (Amperes)

NumberConductorPerPhase - Number of conductors per phase

OuterDiameter - Outer diameter of conductor

OutOfOrderIndicator - Indicates whether a line segment is de-energized (for example, out of service for maintenance)

RatedCurrent - Continuous current rating of conductor, including any de-rating required for special conditions (Amperes)

Reactance - Positive sequence reactance of conductor (ohms per map unit length)

Resistance - Positive sequence resistance of conductor (ohms per map unit length)