Railway Signalling Track Circuits  Closed TC  Open Track Circuit Fed over track circuit

Railway Signalling Track Circuits | Closed TC | Open Track Circuit| Fed over track circuit

Railway Signalling Track Circuits | Closed TC | Open Track Circuit| Fed over track circuit Track circuit is a vehicle detection device in which the running rails form part of an electrical circuit. The boundaries of track circuit are marked by insulation joints on the rail and rails are bonded at rail joints for better conductivity. Uses of […]

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Railways Signalling Relays | Shelf type Relays

Railways Signalling Relays | Shelf type Relays

Relays Relay is an electromagnetic device which is used to convey message electrically from one circuit to another circuit through a set of contacts (back or front contacts)and works on the principle of electromagnetism. Relays are classified as : According to source of power applied – DC Relays & AC Relays. According to mounting – […]

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Railway Signalling alphabets Abbreviations Equipment | Code for Designation of Colours In Railway Signalling

Railway Signalling alphabets Abbreviations Equipment Signalling Equipments Meaning of alphabets used to denote Signalling Information A – Approach, Automatic. Near end point. B – Block positive energy, Far-end point. C – CONTACT. Center, Check. D – CLEAR, GREEN E – EARTH, LAMP F – FRONT, FUSE G – SIGNAL, GATE H – CAUTION YELLOW. HH […]

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Electrical Detector

Railway Signalling Electrical Detector

Electrical Detector Electrical detector is an electro mechanical device to check the position for correct setting and locking of points through making an electrical contact, which closes a circuit. It has two sets of fixed contacts. In center, bridging contact assembly on a roller cam shaft, which works in conjunction with the points and lock […]

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Railways Signalling Cables Indoor cables Outdoor cables Power cables

Railways Signalling Cables | Indoor cables | Outdoor cables | Power cables

Cables Cable is a unit, which contains more than one insulated conductor bunched in to a compact form by providing mechanical protection and electrical insulation. PVC insulated, PVC sheathed and armoured signalling cables are used for carrying signalling circuits. Conductors are of copper and of approved size. Cables are classified as „INDOOR‟ cables and „OUTDOOR‟ […]

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Railway Signalling Electrical Point Machine

Railway Signalling Electrical Point Machine An electrical point machine is an electrically driven motor used for operation of points in railway yards. The rotary motion of the motor is transmitted through the reduction gears and transmission assembly and converted through linear movement of a toothed rack through a pinion. The gear rack drives switch rails […]

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FOUR FOOT POINT MACHINE

Prototype RS Indicator|Point Selection Schematic|Four Foot Points Machine|Four Foot Points Movement Clip|Point Checkback|Point Detection|Rail Gap Indicator Thales Railway

Prototype RS Indicator|Point Selection Schematic|Four Foot Points Machine|Four Foot Points Movement Clip|Point Checkback|Point Detection|Rail Gap Indicator •Route secure indicators are mounted at the side of the track and use LEDs to display a route indication to the train operator. •They are not used in normal operation. •They are used after a failure:  to permit […]

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