Cancel Train Demand and observe Y / N Level crossing ceases to operate and traffic lights resume normal operation Relay sequence to be observed Y / N “TDR” energises then de-energises, “TLR” then “XR” energises 2.3 Turn the “Manual Operation switch “ON” and observe de-energised and Y / N “TDR” “XR” de-energised Level crossing operates immediately Y / N Traffic lights proceed through the Functional Test 3 Train Demand Phase and Clearance Y / N RA/ARTC Phase Manual operation of Level Crossing Cancel Train demand and observe Level crossing ceases to operate and Y / N traffic lights resume normal operation Relay sequence to be observed “TDR” Y / N energises then de-energises, “TLR” then “XR” energises 3 Fault Test Scenarios RA/ARTC 3.1 TDR links open on NC and NO Y / N contacts Y / N Traffic Lights go into train demand TDR false indication Y / N phase Inputs off Reinstate links TDR links closed on NC and NO Inputs on Y / N contacts Traffic Lights go into train demand Y / N phase Y / N Reinstate links RA/ARTC 3.2 XE links open on NC and NO contacts Y / N Traffic Lights go into train demand Lights false indication Y / N phase Inputs off Y / N Reinstate links XE links closed and false feed on NC Y / N and NO contacts De- energise TDR Y / N Inputs on Traffic Lights go into train demand Y / N phase Y / N Reinstate TDR RA/ARTC Y / N 3.3 Remove N12 to TLR Traffic Light Relay (TLR) Y / N De-energise TDR false indication Y / N Level crossing operate as per normal Inputs off Y / N Reinstate TDR Check 1 sec delay between TDR Y / N energises and then XR energises Inputs on False feed TLR Y / N De-energise TDR Y / N Level crossing operate as per normal Y / N
Cancel Train Demand and observe Level crossing ceases to operate and traffic lights resume normal operation Relay sequence to be observed “TDR” energises then “TLR” de-energises, then “XR” energises Y / N Y / N 2.3 Functional Test 3 Manual operation of Level Crossing RA/ARTC Turn the “Manual Operation switch “ON” and observe “TDR” de-energised and “XR” de-energised Level crossing operates immediately Traffic lights proceed through the Train Demand Phase and Clearance Phase Cancel Train demand and observe Level crossing ceases to operate and traffic lights resume normal operation Relay sequence to be observed “TDR” energises then “TLR” de-energises, then “XR” energises Y / N Y / N Y / N Y / N Y / N 3 Fault Test Scenarios 3.1 TDR false indication Inputs off Inputs on RA/ARTC TDR links open on NC and NO contacts Traffic Lights go into train demand phase Reinstate links TDR links closed on NC and NO contacts Traffic Lights go into train demand phase Reinstate links Y / N Y / N Y / N Y / N Y / N Y / N 3.2 Lights false indication Inputs off Inputs on RA/ARTC XE links open on NC and NO contacts Traffic Lights go into train demand phase Reinstate links XE links closed and false feed on NC and NO contacts De- energise TDR Traffic Lights go into train demand phase Reinstate TDR Y / N Y / N Y / N Y / N Y / N Y / N Y / N 3.3 Traffic Light Relay (TLR) false indication Inputs off Inputs on RA/ARTC Remove N12 to TLR De-energise TDR Level crossing operate as per normal Reinstate TDR Check 1 sec delay between TDR energises and then XR energises False feed TLR De-energise TDR Level crossing operate as per normal Y / N Y / N Y / N Y / N Y / N Y / N Y / N Y / N
ESM0301F-04.docx