FSP01, FSP02, FSP03 or FSP04? Understanding the Differences of Functional Supply Points in Rail Signalling
Functional Supply Points (FSPs) might not be the most visible part of a rail signalling system, but they’re one of the most critical. When signalling power is reliable, everything else tends to run smoothly. When it isn’t, the impact can be immediate and costly. At a glance, FSPs can look broadly similar. In practice, the […]