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  Total Solution for High-Speed Rail  

A memorandum of understanding between Thailand and China to construct the Bangkok–Nong Khai high-speed railway or transnational railway between China and Thailand (North-East Line) aims to substitute existing rail systems to facilitate connecting between businesses and city. Therefore, the project is one of the most Thailand ambitious projects in recent years.
Kumwell Corporation PLC., the grounding system management leader, participates in studying the Integrated Earthing System’s blueprint and material. Moreover, the company procures, produces, and tests the products in the international standard laboratory.
Consequently, Kumwell is officially appointed to provide materials for the whole project for lightning protection systems equipment, buildings shielding, and an Integrated Earthing system. Also, the company is authorized to be a resistance inspector and Integrated Earthing System’s tutor in all of the projects.
Integrated Earthing System for High-Speed Rail
  • Grounding System's design for the high-speed rail should be Integrated Earthing System installing the Runthrough Earthing Cable, paralleled with both rails, throughout the railways.
  • Other grounding systems, such as OCS poles, metal foundations, or electrical equipment installed in 5 meters from the OCS, must connect to the Integrated Earthing System.
  • Grounding is the critical part of the rail system's safety and stability. Any falling, tearing, or loss of conductors can affect electrical equipment, disrupting operation. To create electrical consistency and connector strength, The Runthrough Earthing Cable should be welded by exothermic welding or UL listed C-Clamp connector with IEC 62561-1 (Requirements for Connection Components) compliance.
  • Kumwell is trusted and assigned for Integrated Earthing System administration of the high-speed railways. Kumwell inspects various soil resistance, such as overpass foundations, overpass-top beams, and Runthrough Earthing Cable. Also, Kumwell reports test results to support safety and stability policies.

Signal Building Shielding to Prevent Electromagnetic

  • Electromagnetic Interference (EMI) and Electromagnetic Compatibility (EMC) affect essential electronics controlling high-speed rail.
  • The signal building in the high-speed railway should be designed as Faraday Cage by welding conductors or metal in a net form. The net surrounds and acts as building shielding from EMI, interrupting indoor apparatus.
  • The conductors used for the building shielding should be tinned-aluminum dipped metal for matching shielding effectiveness according to the IEC 61000-5-7. Additionally, the conductors should be circular, adjustable in multiple directions because of their easy installation, and pass IEC 61261-2 standard (Requirements for Conductors and Earth Electrode).

  Total Solution for Airport  

Airports are one of the most crucial domestic and international transportation systems. They transport people and products, driving the economy in travel and logistic industries and generating income for the country.
However, lightning strikes at airports often cause flight delays or cancellations, causing valuable damage to the economy and trust. An example incident is an airport lightning strike at London Stansted Airport, UK, which damaged the fuel refilling system, causing delays and cancellations to multiple flights. Many airlines have to refund their flights, leading to critical damage to businesses.
Therefore, Kumwell presents the “Airport Lightning Protection System solution to provide safety and reduce damage from lightning”, being an airport lightning protection standard.
Lightning protection systems in the airport buildings design and touch voltage prevention by KIC
  • Airport buildings: passenger terminals, warehouses, parking buildings, hangars, and more, needs a lightning protection system to prevent building’s physical damage and people’s lethal threats from lightning strikes.

  • Air Terminations’ materials should be tinned copper for enduring product life and aesthetics due to its shininess and rusty resistance.

  • In airport existing buildings case, down conductors need to be attached to external infrastructure. Therefore, people might accidentally contact the down conductors, which might get injured from touch voltage. Thus, using KIC cable, a specially insulated down conductor, is advised. The cable shall be passes an impulse voltage test at 100 kV (1.2 50 ⁄ μs waveshape). To prevent touch voltage hazards, the down conductor needs to be away at least 3 meters from the ground level.
Effective length grounding design
  • When a lightning surge, which is a high-frequency current, flows into the grounding system, the grounding resistance will behave as an impedance. Hence, the grounding design should focus on diminishing grounding resistance and reducing grounding impulse impedance, which can be done by effective length design.
  • In case of grounding installation in the high resistance soil, MEG (More Effective Grounding) should be placed around the conductors or ground rods to reduce ground resistance.
  • Kumwell MEG is a ground enhancement that is non-corrosive, high endurance, environmentally friendly, and has significantly low resistance (0.03 ohm/meter). Also, MEG passes IEC 62561-7 standard (Requirements for earthing enhancing compounds)
Static hazard prevention by Static Earth Receptacle and Static Earth Reels
  • When aircraft are parking or maintenance, there is a chance of static discharges, leading to spark and fuel explosion. Thus, the maintenance system needs to be connected to the grounding system to prevent the discharge hazard.
  • Static peril prevention can be executed by installing Static Earth Receptacle, connected to ground electrodes or grounding systems in hangars or maintenance areas. Moreover, Static Earth Reels, a plier sling used for discharging, should be available when the aircraft fills its fuels.
  • Kumwell Static Earth Reels are slings that can be used with air crafts and be the automatic reverse.
The lightning protection, grounding and smart surge prevention system management by
Smart Lightning Management System (SLMS)
  • SLMS is an intelligent system monitoring overall lightning protection, grounding, and surge protection system. It can alert lightning and electromagnetic threats immediately.
  • SLMS’ process starts with All data from monitoring devices, such as Smart Grounding Monitoring, Smart Surge Monitoring, and more, to be transferred to the central control or administrator. Thus, they can inspect and solve the issues instantaneous for lives’ safety in operational and public areas, reducing loss to buildings, communication systems, and other operating systems.

Airport’s open area lightning protection by
Smart Lightning Warning System
  • Operate personnel: ground equipment services and aircraft marshallers are at significant risk of lightning strikes. The risk can be prevented by implementing Smart Lightning Warning System.
  • Kumwell researches and develops Smart Lightning Warning System, a precise alert system by Alarm Viewer software. It uses data from Lightning Detection Network, installed M-Field Sensor nationwide, and works with E-Field Sensor installed in the open area. When there is a high chance of lightning in the area, the system will alert operating personnel to move away from the danger area; also, it will alert them to continue activities when the site is safe.