railway signalling cables

Railway Signalling Drain/Screen Wire,Types of Cables,Power Cables, SER,Earth Cables 

Definition: Single or group of wires bunched together with sheath protection is  called Cable. DRAIN/SCREEN WIRE: An un insulated solid or stranded tinned copper wire which is placed directly under a shield. It touches the shield throughout the cable, and, therefore, may be used in terminating the shield to ground. A big labor saver in […]

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NWKR/RWKR, NWR/RWR, POINT OPERATION CIRCUIT, WCR, POINT OPERATION, WNKR/WRKR, NWKR/RWKR CIRCUIT 

NWKR/RWKR CIRCUIT * With WLR, RCR/NCR picked up, NWKR/RWKR drops. * There by all indication relays& its repeater relays (NWKPRs, RWKPRs, NWKSRs, RWKSRs) drop.   NWR/RWR CIRCUIT With WLR up, all indication relays drop, NCR/RCR up, NWR/RWR will pick up at location   POINT OPERATION CIRCUIT AT LOCATION * With NWR/RWR picks up, WJR picks […]

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Overlap Stick Relay Circuits - OVSR & OVJSLR

Railway Signalling SMR/SMCR/TSR/UCR/ASR /ALSR/UYRs/ OVSR /OVJSLR Circuits

SMR/SMCR CIRCUIT This relay is energized when the SM’s panel key is `IN’ and turned to Normal. The Energisation of SMCR/SMR relay provides authorized operation of all the functions on the panel. When SM’s key is turned to reverse and taken out from panel by SM, prevents un-authorized operation and locks the panel in the […]

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RRI LAY OUT WITH ALL BUTTONS FOR SIGNALS,POINTS&ROUTES

RRI LAY OUT WITH ALL BUTTONS FOR SIGNALS,POINTS & ROUTES

RRI LAY OUT WITH ALL BUTTONS FOR SIGNALS,POINTS & ROUTES   SIGNAL BUTTON CIRCUIT Any button pressed, the concerned signal button relay will pick up providing all other buttons relays are dropped and no button remain pressed.   ROUTE BUTTON CIRCUIT Required route button is pressed to energize the route button relay POINT BUTTON CIRCUIT […]

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ANR/BNR CIRCUIT

RRI Signal, Points With Switches & Routes With Buttens,NCR/RCR,RR Relay Circuits

RRI Signal, Points With Switches & Routes With Buttens ANR/BNR CIRCUIT When route button is pressed, the route button relay concerned ANR , BNR etc. picks up. RR RELAY RR RELAY: WHEN THE KNOB REVERSED, THE RR CONCERNED PICKS UP PROVING ALL OTHER CONFLICTING SIGNALS NRs IN PICKUP LR RELAY As the signal knob is […]

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