Sequencing Items in Block Macros - Intergraph Smart Electrical - Help - Hexagon

Intergraph Smart Electrical Help

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Smart Electrical Version
10

You use a sequence number if a particular item type appears more than once in a specific block. The sequence numbers define the item uniqueness and the order in which the items appear in the generated schematic drawing. The sole function of the sequence numbers is to help the software identify the plant items and retrieve the appropriate data from the right tags.

The sequence numbers are unique per item type. You add these sequence numbers to the macros so that the software can retrieve the correct data belonging to the appropriate plant item. You sequence the items belonging to the same type in the ascending order starting from the first item that appears right before the load and continue up to the feeder circuit. These numbers represent the order in which the various items are connected in the Electrical Engineer or circuit internals in the Electrical Index. Note that these sequence numbers do not correspond or relate to the Sequence in group values entered in the Properties window.

Also, the sequence numbers do not have to be consecutive (for example, 1,2,3), but they have to be in ascending order, for example 1, 5, 12, 20 and so forth.

In order to match the macros with the appropriate plant items, the software creates lists of plant item types. These lists contain items that are ordered according to their electrical connections in the Electrical Engineer starting from the load and up to the feeder circuit. The lists also include all the associated internals that exist in the circuits (either panel or feeder circuits) that may exist along the electrical path. After the lists are complete, the software matches each plant item on the list with the macro that contains the appropriate sequence number. The software matches the first plant item on the list with the macro that has the lowest sequence number then with the macro that has the next number, and so on.

Handling Load Feeders with Parallel Branches

If there are several electrical paths/branches from a load to its feeder (for example, forward/reverse power paths), the software starts creating the lists starting with the branch that has the lowest sequence number. You define the branch order by setting the value in the Sequence in group property of the item closest to the load of the pertinent branch.

After completing the list of the items of the first branch (including the feeder and its internals), the software goes on to list the items of the next branch. The next branch is the one that has the next numeric value in the Sequence in group property of the item closest to the load in that branch. Note that the second list does not include the circuit and its internals as they are already included in the first list.

Handling Incomer and Feeder Circuit Internals

Make sure that you define the sequence numbering of circuit internals in the following manner:

For incomer circuit internals and riser circuit internals - descending order, starting with the item closest to the bus.

For feeder circuit internals and coupler circuit internals - ascending order, starting with the item closest to the bus.

Handling Converting Equipment Items

The software handles converting equipment macros starting with the items that appear at the bottom of the schematic based on the design in the Electrical Engineer. For a transformer that has cables and circuits connected to both primary and secondary windings, the software first resolves the items that have the lowest sequence in group numbers. After resolving the items that are connected to the first secondary winding, the software continues resolving the items for the primary winding from the bottom of the schematic up to the feeding bus. Then, the software returns to the bottom of the schematic and continues resolving the items that are connected to the other secondary winding (if one exists).

Handling Non-Power Related Items of Schematic Drawings

After completing the list of the items along all the existing electrical paths from the load to the feeder, the software looks for the associated control stations. If several control stations are associated with the load, the Sequence in group value of the controls stations determines the macro that is associated with that control station.

Macro Sequencing Example A

Macro Sequencing Example B

Macro Sequencing Example C

Macro Sequencing Example D

Macro Sequencing Example E

Macro Sequencing Example F