OHE is a system of electrification that is used to transmit electrical energy to electric engine/locomotives. Further these electric energy converted into mechanical energy by locomotives/engine. The full form of OHE is ”Overhead Equipment” or ”Overhead Electrification”.
WHY OHE IS MOST IMPORTENT IN RAILWEY?
- Economic approach: – India imports oil approximately 80% of its need. The cost of oil is very high due to importing oil in such large quantities, while the electricity production capacity of India is very high because the coal& water is at the abundant, so the cost of electricity is less than diesel. Because of this, the electrification of the railway is very important.
- Speed of electric engine is more than the diesel engine. Therefore, the electrification of the railway can significantly contribute to the modern India’s economy.
- Diesel engine have very complex parts, so we cannot be maintained easily to Diesel engine’s parts.
That’s why we can say, electric Engine can be easily maintained rather than the diesel engine.
WHAT IS THE PRINCIPAL OF OHE?
Just as our veins carry blood to keep our heart functioning, similarly the Overhead Equipment (OHE) is responsible for supplying electricity to the electric locomotive.
At the substation, power supply is received in three phases, which is then transferred to a single phase 25kv supply through a transformer. This supply is further transmitted to the electric engines with the help of a pantograph. To ensure smooth operation of the electric locomotive, Substation Power (SSP) is installed every 10 to 15 km, and Sectioning Post (SP) is installed every 40 km.
TSS (Traction Sub Station):-
The electricity supply to OHE is received through TSS, Indian Railways brings cases for three phase supply by a private company, this three phase supply is converted into single phase 25 KV through the transformer fitted in TSS.
SP (Sectioning & Parallel Post):-
- SP, works to divide two difference phases through PTFE.
- It also works as a switching station.
- It is stabilized every 40 km from the TSS.
SSP (Sub-Sectioning & Parallel Post):-
- SSP works to boost the voltage, so that the voltage supply does not reduce according to the increasing distance.
- It also works as a switching station.
- It is stabilized approximately 10 to 15 km.
NEUTRAL SECTION (PTFE):-
Neutral section is stabilized near the TSS or SP. It works to divide two difference phases.
What is work procedure in OHE
1) PLANNING
2) SURVEY
5) GROUTING
6) BRACKET & GUYRODE ERECTION
7) WIRING
8) COUNTER WEIGHT ERECTION
9) DROPPERING & CLIPPING
10) ANTICREEP WIRE ERECTION
12) ATD CUTTING & ADJUSTMENT
13) TROLLEY CHECKING
14) SED CHECKING
15) OTHER miscellaneous WORK
16) TOWER WEGON CHECKING
17) MEGGER VALUE & CONTINUTY TEST
18) ELECTRICE LOCO TRIAL
19) CRS
TOP COMPANIES THOSE WORKING IN OHE PROJECT-
- L&T
- TATA
- KPTL
- KEC
Larsen & Toubro Limited (L&T)
Larsen & Toubro Limited (L&T) is a leading Indian multinational conglomerate that operates in various sectors, including engineering, construction, technology, and electrical equipment manufacturing. L&T has a significant role in the implementation and maintenance of Overhead Electrification (OHE) systems in the railway sector.
In the context of OHE, L&T offers comprehensive solutions, including design, engineering, procurement, installation, testing, and commissioning services. The company has expertise in installing and maintaining various components of OHE systems, such as the overhead wires, masts, portals, traction substations, switchgear, and power supply systems.
L&T’s involvement in OHE projects includes the development of high-quality infrastructure and the installation of advanced technology systems. The company ensures the efficient and safe supply of electrical power to trains by utilizing its engineering capabilities, experience, and expertise.
Additionally, L&T provides regular maintenance, repair, and upgradation services for OHE systems to ensure their smooth operation and longevity. The company employs skilled professionals who are trained in OHE system installation, maintenance, and monitoring to ensure adherence to safety standards and industry best practices.
Overall, Larsen & Toubro’s role in OHE involves providing end-to-end solutions, including design, engineering, installation, commissioning, and maintenance services. Its contributions support the efficient functioning and electrification of railway lines, enhancing the reliability and sustainability of train operations.
Tata Group
Tata Group is not directly involved in the implementation or maintenance of Overhead Electrification (OHE) systems in the railway sector. Tata Group is a large Indian multinational conglomerate with operations in various industries, including steel, automotive, information technology, energy, and consumer goods.
While Tata Group does not have a specific role in OHE, its various companies may indirectly contribute to the railway sector through their products and services. For example, Tata Power, a subsidiary of Tata Group, is involved in the generation, transmission, and distribution of electrical power. The company may provide power supply solutions for OHE systems through its energy infrastructure projects.
Furthermore, Tata Steel, another subsidiary of Tata Group, can contribute through the manufacturing of steel products used in the construction of railway infrastructure, including OHE equipment such as masts and portals.
Although Tata Group’s involvement in OHE might not be direct, its diverse businesses can play a part in supporting the railway sector’s requirements, including OHE projects, through their respective capabilities and offerings. It is important to note that the specific involvement of Tata Group’s companies in OHE might vary over time, and it is always recommended to refer to the latest information available.
KPTL
Kalpataru Power Transmission Limited (KPTL) is a leading global engineering, procurement, and construction (EPC) company that operates in the power transmission and infrastructure sectors. KPTL has experience and expertise in executing various projects related to power transmission, including Overhead Electrification (OHE) systems in the railway sector.
KPTL’s role in OHE involves providing comprehensive solutions from design to commissioning. The company undertakes the construction of OHE systems, including the installation of overhead wires, masts, portals, traction substations, switchgear, and associated infrastructure.
KPTL’s expertise lies in leveraging its engineering capabilities and experience to develop technologically advanced OHE systems. The company ensures the efficient and reliable supply of electrical power to trains by adhering to the highest quality standards and adhering to safety norms.
Additionally, KPTL offers maintenance and upgradation services to ensure the longevity and smooth functioning of OHE systems. The company has a dedicated team of professionals trained in OHE system installation, maintenance, and monitoring to ensure reliable and safe operations.
In summary, Kalpataru Power Transmission Limited’s role in OHE involves providing end-to-end solutions for the construction, installation, commissioning, and maintenance of OHE systems in the railway sector. Through its expertise and capabilities, KPTL contributes to the efficient electrification and reliable functioning of railway lines.