Panel Tester

Panel tester Improves reliability of "Railway Signaling Interlocking - System Integrity test by

• Automating the Test process
  • Test Case Generation
  • Test Case Execution
  • Validation of Test Results
• Produce Test Results document for Evidence.

Description :

The conventional (manual) system has the following limitations

• Test procedure is not fully defined
• No document of Testing ( test plan )
• No evidence of Test Results
• No evidence of validation of test results
• No scope for verification of tests done since no tangible output results out of testing

Architecture :

Modules of system :

• Datalogger
  • Processor based system
  • Logs the status of Relay contacts
  • Connected to PC by serial port
  • Works on 24 v DC
• Relay Driver
  • Processor based system
  • Relay Driver Cards (128 Output) – Quantity dependent on Size of Panel ( No. of routes)
  • Controlled by software program in the PC
  • Connected to PC by serial port
  • Works on 24 v DC
• PC (Tester software)
  • Connected to Data logger and Relay Driver by serial ports
  • Loaded with yard specific test software and software to communicate with relay driver and data logger
  • Test status displayed on real time basis
  • Report generation

This system is applicable for

• Route setting type panels
• non-Route setting type panels with Table of Control(TOC).

Following types of System Integrity tests :

• Negative test of controlling functions as per TOC
• Route release test - light engine and long train
• Test for route locking
• Test for back locking or route holding
• Test for approach locking
• Red-lamp protection test
• Aspect sequence control test
• Lamp cascading test
• Point track locking test
• SMKEY locking test for different assets
• One signal one train test
• Crank handle and LX Gate locking test
• Square sheet test

Process of testing :

• Representation of Table Of Control in terms of data logger inputs
• Instructions for carrying out tests are defined
• Tests are converted to a software program based on Table Of Control
• Desirable test results are generated by software program based on Table Of Control
• Online test results are compared with desirable results through software program
• Status of the required relays are taken by the system from Data logger

Benifits:

Usage/Application Areas :

• Railway Signal Interlocking testing in
  • Panel Interlocking ( PI )
  • Route Relay Interlocking (RRI)
  • Solid State Interlocking (SSI)