Covers different types of relays and their working principles, block instruments (both token and tokenless variants), and point machines — the electro-mechanical actuators that physically move track points under interlocking control.
Key Points
- The Block Working Manual specifically distinguishes token instrument requirements from tokenless instrument requirements — a frequently tested distinction on single vs. double line sections.
Content Status
Draft note, grounded in real official syllabus text found via research but not yet cross-checked against the primary RBE PDF directly. Treat as study-aid only until verified.