Override a power design

Overrides give you manual control of the final network. Use them at the end of the design process, once you’re happy with your initial layout.

Overrides are optional.

Lock the footprint and transformers

Click Lock footprint and transformers. FOND locks down your design’s wiring and transformer locations before allowing you to use overrides.

Make your changes

Footprint

The footprint is the set of primary and secondary wire routes the design must follow. Footprints provide finer control than blockers.

• Edit footprint, then choose the primary or secondary layer before drawing.
• Replace footprint overwrites your footprint with the latest design’s wiring.
• Upload primary and secondary footprints separately.
• Delete removes both footprint layers.

 3-phase path

A 3-phase path forces a three-phase primary route from a source hub to a transformer (or primary joint box)

1. Click Draw.
2. Use Draw shortest path to draw from a source hub to a fixed transformer. Direction matters, so always start at the source hub.

Loop connections 

Loop connections add primary connections that close a loop.

1. Click Draw.
2. Use Draw shortest path to connect two points.
3. In the Feature Attributes window, choose a WireSize and Phase.

Only wire sizes switched on in your architecture are offered. 

Rules:

• The loop must start and end at a source hub, a fixed transformer or a primary joint box.
• It can’t start and end at the same point.
• Its phase must suit its wire size, and match any two-phase wire it connects to. For example, a phase C loop can’t connect to an AB wire.

Phase overrides

Phase overrides change which phase a branch of the primary network carries.

1. Click Import solve phases. FOND adds an override point wherever the phase can be chosen:
   • Where the network steps down in phases (three to two, three to one, or two to one)
   • At single-phase transformers fed from two- or three-phase wire
2. Click Edit.
3. Select one or more override points, then choose a phase: A, B or C, or AB, AC or BC if your design has two-phase branches. You can also press a, b or c on your keyboard.

Only phases that are valid for every selected point are available. To start again, click Replace phases to reset them to the latest design.

Re-run the design

Click Re-run design generation to apply your overrides. Check the new outputs to make sure you got the results that you expected.

Clear overrides

To go back to changing source hubs, blockers or transformers, click Clear overrides.