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Advanced Solution for 25kV Overhead Line (OHL)

Railway Network is the backbone of the Indian transportation system, connecting remote villages and towns with metropolitan cities across the country. Recent government initiatives aim to revamp and modernize the entire network by 2030, and since the past few years have brought many changesin the rail system. From a technological perspective, we can expect two notable changes in Indian Railways, the introduction of electric and solar-powered trains and an increase in the operating speeds of trains from 100 km/h to 160–220 km/h. To support these plans, suitable modifications must be made to the existing infrastructure and components, such as the overhead equipment (OHE) including catenary and contact lines, as well as, pantograph assemblies.

Raychem RPG, a pioneer in innovative energy solutions for various sectors, has a dedicated R&D team working on products that can meet the challenging requirements of the evolving railway network. The team of researchers has improved the designs of

Auto Tensioning Device-(ATD),
Short Neutral Section-(SNS),
Modular Cantilevers System-(MCS) &
Composite Insulators

which are the most critical components of the railway's overhead equipment.

Explore our Products

ATD (Auto Tensioning Device) Customizable
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ATD (Auto Tensioning Device)

Light weight spring ATD for 25 KV line - 20KN and 24 KN. In an electric rail system, power is supplied by overhead lines that run along the entire length of the railway tracks. This power is transferred to the train by means of the pantograph which is a current collector mounted on top of the locomotive. ATD provides a mechanism for automatic tensioning of OHE lines to ensure smooth collection of current by moving pantograph. Tensioning is needed on the contact lines due to variation in their lengths. Contact lines are primarily made from copper-based alloys prone to expansion and contraction due to variations in atmospheric temperatures. The absence of tensioning causes overhead lines to sag or tighten, leading to pantograph entanglement or snapping of overhead equipment (OHE) lines. We have introduced an indigenous spring ATD which is very light in weight and can cater to the load requirement upto 30 KN.

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MCS (Modular Cantilever System) Customizable
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MCS (Modular Cantilever System)

MCS for 25 KV high speed requirements - 20 KN and 24 KN. Raychem Indigenous Modular Cantilever System is designed to support the assembly of overhead power transmission wires — i.e., catenary (1000/1200 kgf tension), contact (1000/1200 kgf tension), and droppers — to transfer the overall bending, transverse, and vertical loads to the mast via insulators. The quintessential cantilever is lightweight and robust enough to support the current-carrying assembly for semi-high speed and high-speed trains up to 250 km/h. In addition to these functional requirements, ease of maintenance, transportation, handling, and aesthetics have been considered.

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Polymeric Surge Arrester & Disconnector Customizable
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Polymeric Surge Arrester & Disconnector

PCA Polymeric surge arresters provides active over-voltage protection that contributes directly to improved reliability of the system, reduces outages and protects expensive terminal equipment. PCA silicone surge arresters are designed and tested to meet customer demands with reliability in offering optimum operational performance. Proven moisture sealing technology Non-tracking insulating silicone materials Fully integrated single piece and void free design Safe mode of failure The PCA series of arresters are designed to perform in the toughest environmental conditions to meet and exceed the requirements of IEC60099-4. Our gapless zinc oxide polymeric arresters have been in service since 1986 and the PCA range builds on that experience.

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Railway Connectors (OHE fittings) Customizable
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Railway Connectors (OHE fittings)

Offer overhead connectors like Branch Connectors, T-Connectors, Bi-metallic Lugs, Bimetallic Sleeves, PG Clamps and Droppers as per NFC Standard. Different types of Compression/Bolted type Connectors and Droppers. They are extensively used by SNCF (French Railway) in France, DMRC and other countries.

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Railway Insulators Customizable
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Railway Insulators

Composite Insulators for 25 KV line Stay, Bracket and 9Tonnes. Polymeric Insulator combines mechanical strength with excellent pollution-free performance. High tensile strength of glass fibre combined with HV shedded profile produces rugged, lightweight tension insulators for overhead line applications. Railway Polymeric Insulator combines mechanical strength with excellent pollution performance. High tensile strength of the glass fibre combined with HV shedded profile, makes it a rugged and lightweight tension insulator for overhead line applications.

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SNS (Short Neutral Section) Customizable
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SNS (Short Neutral Section)

Short Neutral Section (PTFE) for 25 KV line, The utility power supply system expects equal loading on all phases. Traction power system works on single phase 25kV traction system. It now becomes important to use all the three phases equally and convert them into one phase traction supply. This is achieved by feeding single phase supply to the adjacent traction substation which is separated by a neutral section. Each feed covers a distance of about 30-40Km feeding all the trains in that zone. Short Neutral sections are dead zones in the overhead line, used for isolating or separating different sections of the overhead electricity transmission line &also to provide smooth transition of pantograph from one section to another. To ensure strong Electrification drive, wear and tear nature of existing PTFE SNS needs a complete relook and design. Raychem RPG has introduced indigenous Short Neutral section for 25 KV line which is a moving roller-based technology and also, an alternative retrofit system for easy replacement of linings. A system which can eliminate the periodic maintenance and servicing issues.

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