Railway Signalling Correlation & Correlation Waiver Presentation 

Railway Signalling Correlation & Correlation Waiver Presentation 

Railway Signalling Correlation & Correlation Waiver Presentation  Purpose of Correlation (quotes from NR/L2/SIG/11201 mod A7) Correlation of signalling records and equipment and wiring on site is required to: Check the accuracy of source records prior to any design alteration; To check that records match the actual equipment and wiring at the site they represent. This means […]

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Railway signalling Solid State Interlocking (SSI)

Railway signalling Solid State Interlocking SSI

Railway signaling Solid State Interlocking SSI  SSI Information Flow Classification of SSI SSI can be classified on the basis of –Type of Redundancy used Dual HW Dual HW with 100% stdby TMR SW redundancy –Whether Object Controllers are provided or not –Type of Data Programming used – Free wire or Geographical Object Controllers   Types […]

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Railway Power Supplies, Earthing and Relay Rack 

Railway Power Supplies, Earthing and Relay Rack 

Railway Power Supplies, Earthing and Relay Rack  Power Supply on Relay Rack : • For Vol.2 the power supplies shall be extended from Power Rack to busbars located on relay rack. • Power supplies shall be located on a separate rack called power supply rack, • The power supply, transformers, filters and other power supply related equipments […]

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