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Precommissioning Check LED Signal Document | Power Supply | Electrical Connector

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Pre commisiioning check list for LED signal aspect for signaling installation of Indian Railways.
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  Date of preparation: March 2005 Format no.: SIG-0201 Version no.: 1 Pre Commissioning Check List For LED Signals  Name of Station: I. GENERALSl. No.Check PointsRequirementActual At Site1.General Requirements i.LED signals are procured from RDSO approved sources with RDSO inspection.YESii.Installation/maintenance staff is trained at manufacturer’s premises.YESiii.Meter used for measurement in case of AC power supplyTrue RMSiv.LED signal lighting units have undergone Burn-in for 72 hours before putting into use.YESv.Rating of fuse used in signal lighting circuit.600 mAvi.Current regulators (CRs) of Main signals have been configured in Blanking mode for OFFaspects and Non-Blanking mode for ON aspects.YESvii.HMU alongwith audio-visual alarm unit has been provided for Main signals- HMU in relayroom and audio-visual alarm unit in ASM’s room.YESviii.HMU is not provided for other than Main signals.YES 2.ECR For Use i.LED ECR (preferable) is used for all signal aspectsYESii.Conventional ECR, if used, is as given below- MakeConvl. ECRSuitability with LED Signals ABB ON–Metal to MetalSiemensOFF–Metal to MetalMain & C-ON signals onlyCGLHytronicsON–Metal to CarbonAll signalsIf used, to be as per table as given in previous columnMain signals:Route Indicator:Shunt signal:C-ON signal:iii.Individual ECR is used for every signal aspect.YES 3.Circuit Requirement for Main LED Signals i.Signalling circuit is such that in case of failure of an aspect, more restrictive aspect startslighting i.e. cutting-in of aspects provided.YESii.Red lamp protection providedYESiii.Every aspect has individual return path.YES  Date : SignatureName & Designation of Inspecting Official Page 1 of 10  Date of preparation: March 2005 Format no.: SIG-0201 Version no.: 1 Pre Commissioning Check List For LED SignalsII. CHECKS FOR MAIN LED SIGNALSSl.No.Check PointsRequirement Signal No. & Aspect (e.g. 1-R, 1-Y,….) Remarks 1. Input voltage available tosignal aspect on load at site> 95 V 2. Voltage fed to Power Supplyof HMU for Main signals, as per manufacturer’s manual22 -26 V DC,> 95 V AC, as applicable 3.Jumper Selection and Wiring Termination i.Proper Jumper selection andwire termination on CR isdone as per manufacturer’smanual, as applicable Jumper Selection: (i) Blanking/Non-Blanking(Blanking mode for OFFaspects, Non-Blanking modefor ON aspects)(ii) ECR type : AC LED, ACconventional, or DC LED(iii) Power supply: AC or DCii.Proper Jumper selection andwire termination in HMU isdone as per manufacturer’smanual, as applicable Jumper Selection: (i) ECR type : AC LED,AC conventional, or DCLED(ii) Power supply: AC or DCiii.Terminations on CR & HMUare proper and properly tight.YESiv.Inter connecting cable between CR & LED signallighting unit is properlyconnected & tight.YESv.Mounting screws of LEDsignal lighting unit, CR &HMU are properly tight.YES Date : SignatureName & Designation of Inspecting Official Page 2 of 10  Date of preparation: March 2005 Format no.: SIG-0201 Version no.: 1 Pre Commissioning Check List For LED SignalsSl.No.Check PointsRequirement Signal No. & Aspect (e.g. 1-R, 1-Y,….) Remarks 4.Check For HMU, Audio Visual Alarm & Correspondence of ECR. i(a).After taking off an aspect,disconnect inter connectingcable between CR & LEDsignal lighting unit from LEDsignal lighting unit(In case there are 2interconnecting cables betweenCR & LED signal lightingunit- Disconnect the cableother than optical sensingcable. The cable with 2 pinconnector is optical sensingcable)(i)Aspect at site extinguishes& more restrictive aspectlights (In case of Redaspect, signal in rear goesto danger).(ii)Aspect fail status appearsin HMU as per manufacturer’s manual.(iii)Audio visual alarm appearsin audio visual alarm unitin ASM’s room.(iv)On acknowledgement,audio alarm silences butvisual alarm continues.(v)ECR of the aspect drops.i(b).Reconnect disconnected cableand take off the aspect again(i) Aspect at site lights normal.(ii) Aspect OK indication lightsin HMU.(iii) ECR of the aspect picks up. Date : SignatureName & Designation of Inspecting Official Page 3 of 10  Date of preparation: March 2005 Format no.: SIG-0201 Version no.: 1 Pre Commissioning Check List For LED SignalsSl.No.Check PointsRequirement Signal No. & Aspect (e.g. 1-R, 1-Y,….) Remarks 4.Check For HMU, Audio Visual Alarm & Correspondence of ECR.(Applicable in case there are 2 interconnecting cables between CR & LED signal lighting unit- Sanarti & Power Tech. makes) ii.(a).Disconnect the opticalsensing cable (i.e. thecable with 2 pinconnector) from LEDsignal lighting unit(i.)  In case CR is configured for  Non-Blanking mode - Aspect atsite lights with deterioratedillumination with input current of CR restricted to 40 mA. In Blanking mode - Aspect atsite extinguishes(ii) More restrictive aspect lights(In case of Red aspect, signal inrear goes to danger).(iii) Aspect fail status appearsin HMU as per manufacturer’smanual.(iv) Audio visual alarm appearsin audio visual alarm unit inASM’s room.(vi)On acknowledgement,audio alarm silences butvisual alarm continues.(vi) ECR of the aspect drops.ii.(b).Reconnectdisconnected cable(i) Aspect at site lights normal.(ii) Aspect OK indication lightsin HMU.(iii) ECR of the aspect picks up. Date : SignatureName & Designation of Inspecting Official Page 4 of 10
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