Switchable Devices
A switchable device in the ArcFM Utility Network (UN) is a device that can allow or block the flow of electric power. When closed, power flows at the location of the device in the network. When open, power is blocked at the location of the device. Examples of a switchable device include a switch, disconnect, load break, bypass, fuse, recloser, and circuit breaker.
Bank and Unit Definition
A switch bank represents the spatial location of the switchable device. It can be contained and have units but are not required.
Units are used to represent the individual piece of equipment inside the bank. It must be connected and contained in an unbalanced network. Units are not required in a balanced network, but if present, they must be contained.
Balanced vs Unbalanced Network Review
The unbalanced network model is used in North America and the banks represent the physical location of the equipment. They can have asymmetrical or symmetrical phase voltage modeling. Phasing is represented on the individual equipment.
The balanced network model is used in Europe and the banks represent the physical location of the equipment. This model only allows symmetrical phase voltage modeling and the phasing is represented on the bank.
Requirements
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In an unbalanced network, add FuseLinkType to the ElectricDevice feature class and the ElectricJunctionObject table.
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In a balanced network, add FuseLinkType to the ElectricDevice feature
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Bank is in the Electric Device feature class
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Units, if needed, are in the Electric Junction object table
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Device must be in-line and cannot be connected by electric junction objects.
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The E:Switch network category is required.
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Device should be two terminals.
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The terminal configuration is bidirectional.
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To separate equipment types, other network categories can be applied.
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Connected units attribute is required for pass-through units when you install a single or 2-phase device on a 3-phase connector.
Fuse and FuseUnit Attributes
A fuse is a switchable device, however additional information is available on the fuse.
|
Name |
Data Type |
Description |
Sample Data |
|---|---|---|---|
|
FuseLinkType |
Short or Long Integer |
Domain coded value |
1 = “N” 2 = “T” 3 = “K” 4 = “E” |
Impact on ArcFM
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Has Connected Units - Used if you want Feeder and Phase information propagated to the unit. They are connected and are kept in sync by the UpdateSubnetwork tool. To make this happen, the PhasesNormal attribute is added to the unit. The Terminal Path Configuration Attribute should be set to None.
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Has Disconnected Units – Propagation will impact only the device, and units will not be kept in sync without customizations. It limits the switchable devices so they can only be gang operated. Phase Swap does not work with disconnected units. The Terminal Path Configuration Attribute should be set to All.
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No Units – No units are listed for the specified asset group asset type categories. The Terminal Path Configuration Attribute should be set to All.
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Network Category use in the ArcFM Product – See Switch Network Categories and Network Equipment Categories for more information..
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Device must be in-line and cannot be connected by electric junction objects
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Designer XI will not be able to pull or push project data from the UN.
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The Editor XI Move and Split tools only work if the device is correctly configured to use these tools.