Route Relay Interlocking (EI)
Coordinated route setting through relay-based logic for stations and junctions with complex train movements.
Route Relay Interlocking (EI) controls the points and signals required for an entire train route through a central control panel. A route request initiates checks for track clearance, point alignment and conflicting movements before the associated signal can be cleared.
A network of electrical relays implements the interlocking logic. Route locking and point detection help protect the selected path while trains move through the station, supporting efficient operation at busy stations and larger railway junctions.
Param Enterprises Private Limited delivers signalling installation and integration works, from design coordination and relay room wiring to outdoor equipment connections, functional testing, commissioning and maintenance.
Our Scope of Work
Key Advantages
Coordinated Route Setting
Points and signals for a selected route are controlled together, simplifying the sequence of operations for station staff.
Conflict Prevention
Interlocking circuits check route availability and prevent incompatible movements from being authorized together.
Support for Complex Station Layouts
Central route controls and indications support the management of multiple lines, platforms and junction movements.
Project Execution Workflow
Layout Review & Route Planning
Review station movements, route requirements, interlocking arrangements and interfaces with existing systems.
Relay Room & Outdoor Works
Install relay racks, control panels, power connections, signalling cables and associated field equipment.
Circuit Verification & Route Testing
Verify relay wiring, point detection, track occupancy, conflicting routes and route release functions.
Integrated Commissioning & Handover
Coordinate station-level testing and commissioning, supported by drawings, test records and maintenance documentation.
Discuss Your RRI Requirements
Work with our team on route control, relay installation and station signalling integration.