Solid Third rail insulator(Railway Insulator) made according to customer's requirements. It substitutes a metro line which was insulated with a so-called pot insulator (ceramic). Cycloaliphatic insulators are certified according to EN 45545 , UL 94 V0 , ASTM D2303, D495, D2196 ,D229 for 3rd rail insulation
A third rail is a semi-continuous rigid conductor installed beside or between the rails of a railway track to provide electricity to the train. It is also known as an electric rail, live rail, or conductor rail. It's most frequent in a mass transport or rapid transit system that has alignments in its own corridors and is totally or nearly completely isolated from the rest of the world. Direct current electricity is typically used to power third rail installations. The electrification system's third rail is not the same as the third rail used in dual gauge railways.
By adding an extra rail, third-rail systems can provide electric traction power to trains. The conductor rail is usually situated outside the running rails on the sleeper ends, however other systems employ a central conductor rail.
Collector shoes are metal contact blocks that make touch the conductor rail on the trains. Through the running rails, the traction current is returned to the producing station. Extruded aluminum conductors with stainless steel contact surfaces or caps are the preferred technology in other parts of the world due to their reduced electrical resistance, longer life, and smaller weight. To reduce resistance in the electric circuit, the running rails are electrically connected using wire bonds or other devices. Depending on the type of the third rail utilized, contact shoes can be placed below, above, or alongside it: these third rails are referred to as side-contact, top-contact, or bottom-contact, respectively.
At level crossings, crossovers, and substation gaps, the conductor rails must be disconnected. At the ends of each section, tapered rails are given to provide for a smooth engagement of the train's contact shoes.
The train's point of contact with the rail varies: some early systems employed top contact, while subsequent advancements used side or bottom contact, allowing the conductor rail to be covered.
High voltages (over 1500 V) are not regarded as acceptable in third rail systems because they pose an electric shock hazard near to the ground. To transfer enough power, a very high current must be employed, resulting in considerable resistive losses and needing feed points that are relatively near together.
Anyone wandering or falling onto the rails will be electrocuted by the electric rail. When allowed by the station layout, this can be avoided by utilising platform screen doors, or the risk can be decreased by situating the conductor rail on the side of the track away from the platform. Although many systems do not employ one, the risk can be lessened by using a cover board supported by brackets to protect the third rail from contact. When cover boards are employed, the structure gauge near the top of the rail is reduced. As a result, the loading gauge is reduced.