Network Junction Features

Network Junction features are used to connect conductors that belong to different Asset Group Asset Type classes and manage ArcFM UN (Utility Network) connectivity. Samples are included in the ArcFM UN Asset Packages and the EUNF Sample Data. We recommend UN rules are set so one Network Junction feature type serves as the connection between two conductors of different types.

In this example, an electric junction feature of a medium voltage connection point is used to connect a medium voltage overhead conductor to a medium voltage busbar.

Requirements

Limit Junction-to-Junction connectivity to tapped transformers and cases in conduit manager.
An asset group asset type of a conductor feature must belong to the E:Has Conductor Info category and have conductor info records.
Conductor info rows must belong to the E:Conductor Info network category, based on their Asset Group and Asset Type.
Each main conductor entity in the E:Conductor and E:Has Conductor Info categories must have its own E:Conductor Info objects. Do not place E:Conductor Info objects in more than one E:Conductor feature.
Conductor Info rows do not participate in UN Topology. Conductor Info records in EdgeObjects do not show connectivity.
Neutral Type, Neutral Size, and Neutral Material attributes must exist on Conductors in the Line feature class and EdgeObject Table to show the neutral information separately from the conductor size and material.
Network Categories that can be used — E:Conductor, E:Busbar, E:Connector Conductor. A conductor must be classified as E:Overhead, E:Underground, or E:Submersible.

Impact on ArcFM

ADMS and ArcFM Designer XI for the UN have limited support for Junction-to-Junction Connectivity.
The Editor XIMove and Split tools expect devices to be inline. If devices are connected using junction to junction connectivity, a message tells the user that these cannot be used based on the current UN configuration.
ArcFM Designer XIdoes not support non-spatial conductor paths.
The ArcFM UN does not place restrictions on these electric junctions specifically. When ArcFM Designer XI pushes a design to the UN, the product (with an Autoupdater) tries to select the correct Electric Junction Feature Type using UN connectivity rules. If more than one Electric Junction can be used by evaluating the UN connectivity rules, an error will be returned to the ArcFM Designer. If a UN Connectivity rule cannot be applied, an UNKNOWN Electric Junction will be added.