Simple Points |
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As can be seen from the diagram, as the point changes, it acts as a switch, changing the frog polarity. This assumes that the point blades are doing the power routing. |
| If we feed power in after the point on the main route, then it can be seen that there will be a short circuit which will trip out the controller, hopefully, otherwise it could blow the controller. | |
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As the diagram show, with a single rail break, there is no short circuit and the locomotive or engine will continue to operate correctly. |
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If a third power feed is needed on the upper route, then another single rail break is required. |
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