Overview of 8 models of lightning protection and lightning protection EvoDis
EvoDis® is developed by the Turkish company MTO ✅ using effective lightning and lightning suppression techniques ✅ includes 8 different technical models to suit different requirements
Lightning Prevention Principle?
The point where the lightning strikes depends on which of the positively charged streamers ascending from the ground objects catches the oppositely charged streamers descending from the cloud. Lightning Prevention Principle aims to avoid an upward streamer development and let lightning strike to any other place.
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Instead of accumulating the charges on a single point and emitting them to the cloud in the form of streamers, thousands of tiny sharp points dissipate the charges and keep the surrounding electric field strength below the threshold level. This process prevents the development of streamers towards the cloud and blocks the formation of a channel in which the lightning current goes through..
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Since that charge dissipation process occurs independently of the polarity of the charges in the environment, this solution works for both negative and positive types of lightning strike perfectly..
EvoDis® Lightning Prevention System
EvoDis® Lightning Prevention System is the first and only product that operates with the principle of preventing direct lightning strikes to metal structures. Unlike the typical lightning arrester solutions such as E.S.E.s, Franklin rods, Faraday cages, etc., EvoDis® Lightning Prevention System makes the protected structure invisible to lightning and create a lightning-free zone.
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Research & Development and Test Stages
EvoDis® Lightning Prevention System is developed through R&D studies of MTO. The research phase of the product is supported by various science and technology institutions..
EvoDis® Lightning Prevention System was put on a series of tests at the Istanbul Technical University High Voltage Laboratory and completed the process with 100% success. Following the laboratory test process, EvoDis® installed on towers of all GSM operators for pilot applications and these outdoor field tests were monitored and tracked by devices called lightning detectors. EvoDis® Lightning Prevention System, once again, had 100% success on the sites which were prone to lightning before EvoDis® applications.
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EvoDis® Applications
EvoDis® Lightning Prevention System is preferred as the primary lightning protection solution by many telecommunication operators and tower manufacturers around the world. With the 100% proven success of EvoDis® System, end users replace their oldfashion lightning protection tools with this reliable prevention solution to make their towers invisible to lightning strikes
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Model EvoDis®
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EvoDis Application Fields
• Telecommunication Towers
• Internet & Antenna Towers
• Radio & TV Broadcast Towers
• Tower Cranes & Mobile Cranes
• HV Power Transmission Towers
• Military Telescopic Masts
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• CCTV & Outdoor Camera Masts
• Weather Station Towers
• Wind Measurement Towers
• Wind Turbines (**)
• Caravans & Towed Trailers
• Sailboats and Yachts
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Learn What is Lightning? The principle of operation of Lightning.....Here
About MOTO of Turkey
Founded in 2007, MTO is an engineering company grown up in lightning protection and grounding market with focusing on creating new technologies, combining the innovation with high-quality engineering service and providing the best solution to the end user
As a result of our research and development studies for 5 years, we developed our first product EvoDis® Lightning Prevention System as the first and the only technology which mitigates the risk of being struck by lightning and hence providing the real protection for the site against direct lightning strikes..
Between the years 2007-2009, MTO took the support of various science and technology institutions, and in 2008, commenced its activities at Bursa Ulutek Technopark office
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While practicing R&D studies continuously, MTO also carries on working for enhancing the performance limits of the products. Our first product group EvoDis® Lightning Prevention System is also the first lightning protection system that has been tested in nature. Devices called “lightning detectors” have tracked the system installed on the towers at various regions in Turkey consistently and the obtained data are regularly reported.
Considering each day as an added value to make our products and services better, our priority is to supply the best solution and engineering service to our clients..
Quality Policy
We believe that a happy employee creates a pleased client. Therefore, we support our colleagues with constant training for constant development and our colleagues gladly support each other for any subject that matters the company in order to generate the best for MTO
MTO efficiently executes ISO 9001-2008 Quality Standard in every department of the company,
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Project Design
EvoDis System is a multi-unit solution and requires unique designs for every structure to be protected
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With the receipt of necessary details and pictures from the client, MTO Engineering Team simulates the possible EvoDis configurations and sets up the list of appropriate EvoDis models to be used. With the approval of the order, MTO Design Team prepares the Installation Projects which lead the field teams to complete the installations easily.
Manufacturing
The unique design of EvoDis models gives MTO the advantage of providing unique parts from multiple outsource suppliers with the exact same quality. MTO has full control on production of these parts via MTO manufacturing codes as well as ISO standards, and the quality of production line and outcome are inspected on regular basis.
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To have the final touch on the production line, all parts are collected in one body and the manufacturing process is completed by two levels of quality control, installation guide enclosure and final packaging.
Global Presence
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MTO has presence in many regions of the world through local offices and local representatives. Our solution partners are fully trained with technical information and capable of running the operation with all details in the region of responsibility.
EvoDis® Lightning Prevention System has been applied on over 3000 sites globally with zero failures for the past 13+ years. We proudly protect metal structures such as telecommunication towers, radio&TV broadcast towers, weather station towers, tower cranes, high voltage transmission towers, outdoor camera masts and sailboats of many clients.
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Synthesis of models to chase lightning, scatter lightning...Here
EvoDis® Lightning Prevention System High Voltage Laboratory Tests Istanbul Technical University
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In consequence of the request of MTO Engineering Ltd. Co. to determine the performance of the “multipoint discharge lightning protection system” (EvoDis® Lightning Prevention System), the system subjected to a series of tests held at Istanbul Technical University High Voltage Laboratories on May 26, 2008.
The tests conducted are 1) determination of the discharge inception voltages for the 300/2500-ms switching impulse voltages, 2) switching impulse voltage capture ratios under the same electro-geometrical conditions, and 3) Corona emission currents in switching impulse voltages.
A standard size copper Franklin Rod taken as reference in accordance with the international test standards, and all tests and measurements also applied on Franklin Rod under the same conditions.
The purpose of the tests is to observe the performance of EvoDis® Lightning Prevention System as a multipoint discharge lightning protection device and to find out its degree of success in the laboratory environment before the field test process. This report is a summary and explanation of the original report issued by Istanbul Technical University.
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Experiments
1) Experiment for determination of the discharge inception voltages for the 300/2500-ms switching impulse voltages:
Both samples (Franklin Rod and EvoDis®-55) are exposed to high voltage at 2-meter, 3- meter, and 4-meter spaces respectively, and the relevant impulse capture voltages are measured:
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According to this result
1. The lightning strikes EvoDis®-55 only when it is forced at higher voltages compared to the Franklin Rod. The Franklin Rod used in the experiments symbolizes any object under the natural conditions. In such a case, the risk of being hit by strike during a storm is much lower for a structure protected by EvoDis®-55 than an unprotected structure.
2. The voltage level which affects EvoDis® Unit increases with the gap between electrodes. In laboratory conditions, the widest space between the metal electrode and test units is 4 meters. In nature, a typical storm cloud base is about 1,5-2 km above the ground. With reference to the results of this experiment, EvoDis® Unit can be hit by a lightning strike only with a minimum potential of 700 million Volts which is not possible with today’s scientific knowledge on the lightning phenomenon. An average lightning strike is considered to be between 10 and 120 million volts.
2) Corona emission currents in switching impulse voltages
Both samples (Franklin Rod and EvoDis®-55) are exposed to both negative and positive switching impulse voltages of 300/2500 µsn at 2-meter, 3-meter, and 4-meter spaces respectively, and the Corona emission currents measured. The measurements with voltages ranging from 300 kV to 1000 kV showed that EvoDis®-55 gives higher values than Franklin Rod at each experiment. It is also observed the Corona emission current increases for both samples as the voltage increases.
The corona emission current represents the charge emission under normal conditions. Accordingly;
1. Under the natural conditions, EvoDis® Lightning Prevention System emits more charges compared to the objects or structures represented by the Franklin Rod.
2. EvoDis®-55 reveals more corona emission which indicates that the protected structures neutralized faster, and they have a lower risk of lightning
3) Switching impulse voltage capture ratios under the same electro-geometrical conditions
Both samples (Franklin Rod and EvoDis®-55) are arrayed side by side in different geometries, exposed to high voltage at 2-meter, 3-meter, and 4-meter spaces respectively, and which of two samples capture more impulses is observed.
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According to this result;
1. Regardless the electrode spacing, i.e. the outlet points of the lightning strike, no lightning strike has hit EvoDis®-55 while there was a Franklin Rod in the environment.
2. The Franklin Rod represents any object or structure under the storm cloud which can be a building, mast, tower, or a tree. Lightning occurrence cannot be prevented but can be prevented to hit a protected structure. This experiment shows that the structure which is protected by EvoDis® Lightning Prevention System cannot be a target of lightning strikes.
Conclusion
All the tests and experiments indicate that the EvoDis® sample have a much lower risk of a direct lightning hit compared to the Franklin Rod and the objects it represents.
In other words, EvoDis® makes the protected places invisible to lightning.
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EvoDis® Lightning Prevention System Wind Drag Force Tests Istanbul Technical University
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This study is done in order to determine the drag force of MTO’s EvoDis®-45 Lightning Prevention Unit model..
Measurement Condition
For the wind speeds to be applied on the test subject; “Beaufort Wind Scale” is used
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Conclusion
Considering the results of the test, the following Wind Drag Forces are calculated for EvoDis® Lightning Prevention System models:
EvoDis®- 65: 16,8 N EvoDis®- 45: 5,8 N
EvoDis®- 60: 12,1 N EvoDis®- 40: 9,9 N
EvoDis®- 55: 17,0 N EvoDis®- 20: 4,9 N
EvoDis® Lightning Prevention System Field Tests TURKCELL – 6 months
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Goal:
The goal is to have lightning strike risk minimized for the towers protected by EvoDis Lightning Prevention System.
Method:
EvoDis Lightning Prevention System is a lightning protection system that mitigates the direct lightning strike risk on metal structures. The method to show that the device works, and it protects the towers against the effects of lightning is to track the lightning occurrence close to test towers and prove that the lightning does not hit the tower. It is possible to detect the occurrence of lightning close to the tower with the lightning detector. Although the test site is the highest structure and the most obvious target for a lightning strike in the environment, if the tower does not receive any lightning hits even though lightning is observed close to the test site, it proves EvoDis Lightning Prevention System functions successfully.
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Test Stages:
The Lightning Detector collected data regularly for almost five months as connected to a standard PC operating on a 24-hour basis and positioned at almost 80 km to the test point.
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Frequent thunderstorms and lightning strike occurrence observed in the test point, especially in October, November, and December. The number of lightning strikes close to the tower in this period is 63 in total. This figure is distributed to months as follows: 3 on October 16, 5 on October 19, 12 on October 28, 2 on November 12, 9 on November 15, and 32 on December 10.
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Conclusion
In consequence of the EvoDis® Lightning Prevention System test that is conducted in Muğla Kıran Village station, 63 positive and negative lightning strikes detected in 0-50 meter range from the tower protected by EvoDis® and none of those detected 63 lightning strikes hits the tower.
In consequence of the application, EvoDis® Lightning Prevention System has completed the tests with 100% success.
Vodafone – 11 months
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EvoDis Lightning Prevention System test is conducted in Bodrum - Muğla which lasts for 11 months, and 48 positive and negative lightning discharges are detected 0 to 50 meters close to the tower protected by EvoDis. These strikes are expected to hit the tower since it is the tallest and the most conductive object around, however after EvoDis Lightning Prevention System is applied on the tower, none of the 48 lightning strikes hit the test tower.
AVEA (Türk Telekom)
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EvoDis® Lightning Prevention System test is conducted in two different locations (Kırklareli and Muğla) which lasts for 15 months, and 106 positive and negative lightning discharges are detected 0 to 50 meters close to the tower protected by EvoDis® . These strikes are expected to hit the tower since it is the tallest and the most conductive object around, however after EvoDis® Lightning Prevention System is applied on the towers, none of the 106 lightning strikes hit the test towers.
Conclusion
In consequence of the field applications, 217 positive and negative lightning strikes are detected 0-50 meters close to pilot sites during the test periods. None of these 217 lightning strikes hit the towers protected by EvoDis® Lightning Prevention System and EvoDis® System completes the field tests with 100% success
References
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Patents and Quality Documents
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