METARRESTERS

🔌 Surge Arresters & Short-Circuit Safety: A Critical Combination ⚡️ Surge arresters do not replace circuit breakers when it comes to handling short circuits, but testing their performance under these conditions is vital to ensuring power system reliability and safety. 💪 🔍 Why It’s Important: Short-circuit tests rigorously validate both design integrity and pressure relief mechanisms, ensuring that any failure occurs safely—minimizing risk to surrounding equipment and personnel. ⚠️ The Risk: A surge arrester with poor short-circuit performance can have catastrophic results, underlining the importance of thorough testing to avoid severe consequences. ✅ The Solution: Safety isn’t negotiable. Short-circuit tests are not just another formality; they are life-saving measures. 🔧 💥 Want to see the action? Check out our latest YouTube video featuring real tests of these powerful surge arrester designs: https://lnkd.in/dcDqxnQY 🎥 Follow METARRESTERS to stay tuned on the upcoming webinar sessions. #ElectricalEngineering #PowerSystems #SafetyFirst #HighVoltage #SurgeProtection #ShortCircuit #EngineeringExcellence #Energy #Electricity #Innovation #Tech

🌍 Join us at the INMR World Congress in Panama City! 🌍 The event, happening from October 19-22, 2025, in Panama City, is a major event for professionals in power systems, focusing on electrical insulation, surge protection, and similar technologies. It features over 120 lectures in English and Spanish, covering advanced technical topics like surge arresters, insulators, bushings, and more. A parallel exhibition showcases cutting-edge products and technologies relevant to the industry. The event is tailored for engineers, researchers, and professionals seeking knowledge and industry updates. 🔌 Key Sessions to Look Forward To: -Session 5: Optimized Application of Surge Arresters to Reduce Lightning Disturbances on Overhead Lines -Session 11 (Spanish): Optimización de la aplicación de pararrayos de línea para reducir las perturbaciones causadas por rayos y evaluación del estado de los pararrayos de alta tensión de clase estación -Session 4: Advances & State-of-the-Art in Condition Monitoring of Surge Arresters & Bushings Learn more and look at the Speakers & Topics : https://lnkd.in/emNXPtAQ 🔗 Don’t miss this opportunity to dive into cutting-edge technologies! #INMR2025 #PowerSystems #SurgeArresters #LightningProtection

🌩 Understanding the Impact of Moisture Ingress on Surge Arresters 🌩 One of the primary causes of surge arrester failures in the field is moisture ingress. Field experience and statistical analysis from monitoring devices have highlighted the significance of moisture ingress as a leading cause of arrester failures. In 2022, Philipp Raschke published an insightful paper at the INMR Congress, surveying >600 arresters. The findings were compelling: 23% were classified as critical, and 63% of those critical arresters were associated with moisture ingress! 📉 🌧 Key Insights on Moisture Ingress: 1️⃣ Causes of Moisture Ingress: Poor design, manufacturing flaws, or physical damage compromising the sealing system can all lead to moisture ingress. 🔧 2️⃣ Effects of Moisture Ingress: It typically induces a sinusoidal resistive current in phase with the voltage on the surface of Metal Oxide Varistors (MOVs). The current amplitude can fluctuate based on factors like time of day, sun exposure, and ambient temperature/climate. ☀️🌡 3️⃣ Risks Associated with Moisture Ingress: Leads to inner leakage currents. Increases the risk of tracking and erosion, internal flashover, and material corrosion. ⚠️ What to Do? 🤔 Two different mindsets : -You trust your surge arresters: Think about implementing a monitoring system capable of detecting moisture ingress early. This would provide meaningful analysis of your equipment's condition. 📊 -You do not completely trust your surge arresters: Consider updating your equipment specifications and quality measures to ensure sealing systems are not compromised. 🔍 #SurgeArresters #MoistureIngress #ElectricalSafety #PowerSystems #PredictiveMaintenance #ElectricalEngineering #AssetManagement #PowerGrid

🚨 Understanding the IEC 60099-4 Classification for Surge Arresters 🚨 Did you know that the IEC classification of surge arresters is closely linked to the diameter of the Metal Oxide Varistors (MOVs)? 📏 When you dive deeper, it gets a bit more nuanced: 🔍 Qrs Ratings (Repetitive Charge Transfer): Directly connected to the performance of the MOV itself. 🔥 Wth Ratings (Thermal Energy): This involves not just the MOV performance but also the thermal dissipation behavior of the surge arrester design. ⚠️ Important Update: Forget about the Line Discharge Class (LDC)! Since the new IEC Edition in 2014, LDC is no longer applicable. Insulation coordination and system studies must now carefully evaluate both the charges and energy requirements in relation to lightning surges and switching surges. ⚡ Understanding these classifications is crucial for designing robust and reliable power systems. Stay ahead in your field by keeping these details in mind! 💡 #ElectricPower #SurgeProtection #IECStandards #MOV #ElectricalEngineering #PowerSystems #LightningProtection #SwitchingSurges

🔍 Understanding the Essentials of Lightning Location System (LLS) Accuracy & Performance ⚡ In the world of power systems, the performance of a Lightning Location System (LLS) is crucial for accurate strokes detection, localization, and identification. Here are some key performance metrics to consider: Flash Detection Efficiency (DE): An effective LLS should achieve a minimum of 80% flash detection efficiency for cloud-to-ground (CG) lightning within the core network area. This area is defined by the outermost sensors of the network. Achieving this DE is challenging as it is nearly impossible to account for every natural lightning event accurately. Location Accuracy (LA): The median location accuracy for CG strokes should be within 500 meters. This ensures precise mapping of lightning events, crucial for operational decision-making and Ground Flash Density (GFD) determination. Accurate location data relies on well-timestamped ground truth references, making it a challenging but necessary task. Classification Accuracy: Ensuring accurate classification between CG flashes and intra-cloud (IC) flashes is vital. A classification accuracy of at least 85% is required to prevent errors in the calculation of ground flash density (Ng). Misclassification can lead to significant errors, either overestimating or underestimating the actual number of CG flashes. 📏 Compliance Check: Ensure your LLS provider meets the IEC 62858:2019 standards for: Flash Detection Efficiency (DE): 80% Location Accuracy (LA): 500 m Classification Accuracy: 85% Additionally, while not covered by IEC 62858:2019, Peak Current Measurement Error remains a critical performance parameter in the industry, often discussed for comprehensive system evaluation. Maintaining these standards ensures reliable data for decision-making and enhances safety measures against lightning hazards. 🌩️ #LightningSafety #PowerSystems #Electricity #StormTracking #LLS #IECStandards #NetworkAccuracy #ElectricalEngineering #Utilities #WeatherMonitoring

🔋 Understanding Surge Arrester Technology: The Role of Metal Oxide Varistors (MOVs) ⚡ Did you know that the core of every modern surge arrester is simply a stack of Metal Oxide Varistors (MOVs)? These MOVs are strategically stacked to form a column, each designed with a specific approach to ensure compression and maintain the integrity of the MOV column. 📏 But what makes these MOVs so crucial? The diameter of the MOV determines its ability to handle current density from transient surges without getting damaged, while the height of the MOV is key to managing temporary overvoltages and ensuring continuous operating voltage over its entire service lifetime. Every surge arrester design undergoes rigorous type testing to showcase its electrical features and prove its long-term stability. ✅ Want to dive deeper into the fascinating world of surge arrester technology? 🌍 Follow METARRESTERS to stay updated and be the first to know about our upcoming webinar! #SurgeArresters #ElectricalEngineering #MOV #PowerSystems #EnergyEfficiency #WebinarAlert #StayInformed

Thanks CIGRE! Great session with positive energy! It was such a pleasure to meet our clients and business partners. See you soon.

🔍 Enhancing Disitribution System Resilience: The Role of Arrester Spacing ⚡ In distribution networks, mitigating the impact of lightning-induced overvoltages is critical for maintaining reliability and reducing outages. Application guide like IEEE 1410 underscore the importance of arrester spacing in reducing flashover rates. 📊 Key Insights: - Properly spaced surge arresters can significantly reduce flashover incidents due to induced overvoltages from nearby lightning strokes. Even with wider spacing (up to 8 spans), flashovers can be reduced by over 25%. 📉 - Strategically placing arresters on poles with lower insulation levels—such as cut-outs, dead-end poles, or crossover poles—can be more cost-effective than enhancing insulation levels. 🏗️ - On distribution circuits, arresters protecting transformers also provide substantial protection against induced flashovers, enhancing overall system resilience. 🔋 By understanding and optimizing arrester placement, we can enhance the robustness of our electrical infrastructure, ensuring more reliable and safer power delivery. #ElectricalEngineering #PowerSystems #GridResilience #LightningProtection #Infrastructure #EnergyManagement #SmartGrid #SustainableEnergy #ReliabilityEngineering #Utilities

⚡🌐 International Standards: Powering Global Electrical Safety! 🛡️ In our recent webinar on surge arresters technology, we highlighted 4 key standard items from TC37 that are shaping the future of overhead lines lightning protection: - IEC 60099-4: Metal-oxide surge arresters for a.c. systems (NGLA/gapless) - IEC 60099-8: Externally Gapped Line Arresters (EGLA) for overhead lines above 1 kV - IEC 60099-11: Lin Surge Arresters (EGLA & NGLA) for overhead lines above 1 kV (ongoing development) - IEC 63518-1: Surge Arc Suppressors SAS devices for systems > 1kV (ongoing development) These international standards are vital for: ✅ Ensuring global safety and reliability ✅ Facilitating international trade ✅ Driving innovation in surge protection 🎥 Follow METARRESTERS to stay tuned about upcoming webinars! #ElectricalEngineering #InternationalStandards #PowerSystemProtection #IEC

🔍 Unlock the Power of Accurate Lightning Data Understanding the nuances of lightning data is key to address lightning performance on overhead lines. Here’s what you need to know: 1️⃣ Not All Lightning Data Is Created Equal Your Lightning Location System (LLS) provider must differentiate between Cloud-to-Ground (CG) and Intra-Cloud (IC) strokes to ensure the data's relevance for risk assessment. 2️⃣ Understanding Lightning: Strokes vs. Flashes Lightning data typically represents individual strokes. However, knowing the difference between a stroke and a flash is vital. By filtering strokes from the raw dataset, you can derive meaningful Flash data. 3️⃣ Protect Your Overhead Lines with the Right Data Utilize accurate data to calculate Ground Flash Density (GFD) based on CG strokes for better protection of your assets. Keraunic level are imprecise outdated methods. 4️⃣ See the Bigger Picture with I3CM LLS I3CM LLS offers a cost-effective and comprehensive solution, providing critical lightning parameters along your line assets. 5️⃣ Get the Lightning Data You Can Trust Accurate lightning data, like NLDN in the US, is essential for agile and effective risk management. Detection efficiency and location accuracy are a must. 6️⃣ Request a Demo & Safeguard Your Power Systems Ready to enhance your power system protection? Visit our website to learn more and request a demo version. The process is simple—just provide your line assets' KMZ/KML file(s). 👉 Learn More https://lnkd.in/duPu5uGJ #LightningProtection #RiskManagement #PowerSystems #DataAccuracy #ElectricitySafety #UtilityIndustry #OverheadLines #Innovation