Blog TOSUNlux | Informations sur les technologies électriques et d'éclairage

Blog

Comment les exigences de protection contre la foudre influencent la conception de la distribution basse tension

28 décembre 2025

Les exigences en matière de protection contre la foudre ont un impact direct sur la conception, l'installation et la protection des réseaux de distribution basse tension (BT). Ces normes visent à limiter les dommages causés par les surtensions, à prévenir les pannes d'équipement et à réduire les risques d'incendie. Dans les bâtiments modernes, l'instabilité des réseaux électriques, les systèmes solaires et les composants électroniques sensibles font de la protection contre les surtensions un élément essentiel de la conception des tableaux BT. Cet article explique comment les normes de protection influencent l'agencement des réseaux BT, pourquoi les dispositifs de protection contre les surtensions sont désormais indispensables et comment une planification adéquate améliore la sécurité et la durée de vie du système. Comprendre le lien entre la foudre et la distribution BT : la foudre n'a pas besoin d'impact direct pour causer des dommages. Les impacts à proximité créent des pics de tension qui se propagent dans les lignes électriques, les câbles de données et les systèmes de mise à la terre. Ces surtensions sollicitent l'isolation, endommagent les dispositifs de protection et réduisent la durée de vie des équipements. Les tableaux de distribution BT sont particulièrement exposés car ils connectent l'alimentation électrique aux circuits internes. Si la protection contre les surtensions est insuffisante, les dommages se propagent rapidement aux charges, aux compteurs et aux équipements d'automatisation. C'est pourquoi les normes modernes exigent que la protection contre les surtensions soit prise en compte dès la phase de conception initiale, et non comme une option supplémentaire. Pourquoi la protection contre les surtensions est désormais une exigence de conception : Les réseaux électriques actuels sont moins stables qu’auparavant. Les énergies renouvelables, les longues distances entre les câbles et les commutations de charges augmentent les surtensions transitoires. Même en l’absence d’orages, les commutations internes peuvent générer des pics de tension dangereux. Des normes telles que les normes CEI 62305 et CEI 61643 recommandent l’installation de dispositifs de protection contre les surtensions aux points d’entrée clés. Ces dispositifs limitent la surtension avant qu’elle n’atteigne les équipements sensibles. Dans les systèmes basse tension (BT), la protection contre les surtensions n’est plus une option. Elle fait partie intégrante de la sécurité du système. Comment les règles de protection influencent l’agencement des tableaux BT : Les normes de conception ont une forte influence […]
En savoir plus
Pourquoi les commutateurs modulaires sont-ils de plus en plus demandés pour les systèmes d'alimentation de secours ?

26 décembre 2025

Modular changeover switches are in higher demand because they make switching between grid power and backup supply safer, simpler, and easier to manage in modern electrical systems. This article explains how they work, why modular designs matter, and how they support safer backup power for homes, businesses, and industrial sites. Backup power is no longer optional. Power cuts affect comfort, safety, and productivity. A well-chosen switching device protects equipment and people while keeping systems running. This guide helps beginners understand the basics and make informed decisions. Understanding Backup Power Switching Basics Backup power systems use two power sources. One is the main grid supply. The other is a generator, inverter, or UPS. These sources must never connect at the same time. A power transfer switch is the device that controls this transfer. It ensures only one source feeds the load at any moment. This prevents back-feeding, equipment damage, and safety risks. Key Takeaways Why Modular Designs Are Gaining Attention Traditional switches were bulky and fixed. Modular units changed that approach. They use compact modules that fit standard panels and rails. This design suits modern distribution boards. It also supports faster installation and cleaner wiring. Electricians prefer modular layouts because faults are easier to trace and repair. Modular systems also scale better. You can expand or reconfigure panels without full replacement. How Safe Power Transfer Actually Works Safe switching is about timing and isolation. When grid power fails, the device disconnects first. Only then does it connect the backup source. This break-before-make action protects circuits and […]
En savoir plus
Pourquoi les dispositifs de protection contre le courant continu sont essentiels pour les systèmes d'énergie solaire modernes

25 décembre 2025

Solar power systems depend on direct current. This current is powerful, continuous, and harder to interrupt than AC. That is why proper DC protection is essential for safety, system uptime, and long-term performance. This article explains how DC protection works, why it matters in modern PV systems, and how the right components reduce risk, downtime, and damage. Understanding DC Power in Solar Installations Solar panels generate direct current. Unlike alternating current, DC flows in one direction without a zero crossing. This makes fault interruption more difficult. As solar systems scale up, DC voltage and current levels increase. Large rooftop and utility PV systems often operate at 600V, 1000V, or even 1500V DC. Higher voltage improves efficiency but raises safety risks. Without proper control, faults can lead to arc flashes, fires, or equipment damage. That is why PV safety depends on well-designed DC protection paths. What Is a DC Protection Device? A DC protection device controls abnormal electrical conditions. It limits current during faults, isolates circuits for maintenance, and diverts dangerous surges away from equipment. Key takeaways: Each function protects both people and equipment. Why DC Faults Are More Dangerous Than AC Faults AC crosses zero many times per second. That helps extinguish arcs naturally. DC current does not. When a DC arc forms, it can continue until the circuit breaks fully. This sustained arc produces intense heat. In PV systems, that heat can ignite insulation or nearby materials. Battery-connected systems increase this risk further. Stored energy can feed faults instantly. That is why protection design […]
En savoir plus
Analyse du marché : Les compteurs numériques dans les systèmes électriques intelligents

25 décembre 2025

Digital panel meters play a key role in modern electrical systems by measuring voltage, current, and power in real time. These readings help users track energy use, detect faults, and improve system safety. As smart buildings and renewable installations expand, our latest digital panel meter market analysis shows that demand for accurate panel-based measurement continues to rise throughout 2026. This article explains how these devices work, where they are used, and why they matter in today’s electrical infrastructure. Understanding Digital Panel Meters in Simple Terms A digital panel meter is a display device used to measure electrical values such as voltage, current, or frequency. It replaces older analog gauges with clear numeric readings. These meters are often installed inside control panels, distribution boards, and electrical cabinets. They act as a power monitoring device, helping technicians and engineers view system performance at a glance. In many setups, they function as both an ammeter voltmeter and a voltage indicator in one compact unit. How These Meters Support Smart Electrical Systems Smart electrical systems depend on real-time, reliable data. Digital metering devices provide fast readings and stable performance, enabling operators to monitor load changes, prevent overloads, and plan energy use more effectively. In smart buildings, panel-mounted measurement supports energy tracking at the circuit level, improves load distribution, enhances fault detection, and contributes to safer power distribution. In renewable energy systems, the same devices are used to observe solar output, inverter performance, and grid connection conditions. Digital Panel Meter Market Analysis and Growth Our digital panel meter market analysis […]
En savoir plus
Erreurs courantes dans le choix des câbles solaires et leur impact sur les pertes de puissance

24 décembre 2025

Choosing the right cable for a solar system directly affects how much power you actually use. The wrong choice can cause energy loss, safety risks, and long-term damage. This article explains the most common mistakes in solar cable selection and how they reduce performance. You’ll also learn how conductor type, insulation, and voltage drop affect efficiency, plus how to avoid costly errors from the start. By the end, you’ll understand how proper cable choices improve energy flow, protect equipment, and extend system life. Why Cable Choice Matters in Solar Systems A solar system does not fail only because of panels or inverters. Many problems start with wiring. Cables carry direct current from panels to other components. If they are undersized or poorly protected, energy is lost as heat before reaching the load. Even small losses add up over the years. That means lower output and higher maintenance costs. Understanding the basics helps prevent these issues early. Mistake 1: Ignoring Cable Size and Current Flow How cable size affects power loss Cable size controls how much current can pass safely. If the conductor is too small, resistance increases. Higher resistance causes a voltage drop, which reduces usable power. This issue often appears in long runs between panels and combiner boxes. The wrong cable size can waste energy daily without visible signs. Simple sizing rule for beginners Longer distance means larger cross-section. Higher current also requires thicker conductors. Always calculate based on distance, current, and system voltage before installation. Mistake 2: Overlooking Voltage Drop in DC Systems […]
En savoir plus
Comparaison des conceptions de boîtes de jonction photovoltaïques pour les projets résidentiels et les projets à grande échelle

22 décembre 2025

The main difference between residential and utility-scale solar projects comes down to system size, safety needs, and how many solar circuits must be managed. This article explains how combiner box designs change with project scale, what protection is required, and how choosing the right setup improves safety, clarity, and long-term performance. By the end, you will understand how these designs work and how they help protect your solar investment. Understanding the Role of a Combiner in Solar Systems A PV combiner box brings together multiple PV strings into one output before power reaches the inverter. This design reduces wiring complexity, limits power loss, and improves system organization. Think of it as a control point where protection devices work together to guard sensitive equipment. For beginners, this enclosure works much like a solar junction box, but with added protection layers. It does more than connect wires. It actively supports PV array protection through breakers, fuses, and surge devices. Residential Solar Projects: Simple by Design Residential solar systems are usually smaller. Most homes use fewer PV strings, often between two and six. Because of this, the combiner design focuses on simplicity and space efficiency. String Count and Layout Home systems typically combine a small number of strings into one line feeding a single inverter. Some very small systems may connect directly without a combiner. Once the string count increases, centralized collection becomes helpful. Protection Needs at Home Safety still matters, even at a small scale. Residential designs often include: These features protect wiring and inverters from overloads […]
En savoir plus
Comment les relais statiques haute fréquence améliorent l'automatisation industrielle

21 décembre 2025

High-frequency solid-state relays help industrial systems switch faster, run smoother, and last longer. They replace mechanical contacts with electronic switching, which allows precise control, low wear, and stable performance in modern automation. In simple terms, they make machines respond quicker while reducing downtime and maintenance. This article explains how these relays work, why they matter in automation, and how they support accurate control in today’s industrial systems. You will also learn where they are used and what makes them a smart choice for growing operations. Understanding Solid-State Relays What Is a Solid-State Relay? A solid-state relay, often called an SSR relay, is an electronic switch. It turns loads on or off using semiconductors instead of mechanical contacts. Because nothing moves inside, switching happens very fast and without physical wear. Key points to understand: Because nothing moves inside, this type of relay avoids wear, vibration damage, and contact failure. Why High-Frequency Switching Matters in Automation Modern automation depends on timing accuracy. Machines often switch thousands of times per minute. Mechanical relays struggle with this demand. High-frequency switching allows: This makes it essential for production lines, packaging systems, and process control equipment. How Solid-State Switching Works Unlike mechanical relays, these devices use electronic components such as triacs, thyristors, or MOSFETs. A small control signal activates the output without physical contact.+1 The signal passes through optical isolation, which separates the control side from the load side. This improves electrical safety and reduces interference. Because switching occurs electronically, response time is measured in milliseconds or less. Advantages in Industrial […]
En savoir plus
Perspectives du marché et tendances d'adoption des commutateurs de transfert automatique (ATS)

19 décembre 2025

The automation of power transfer systems is promising for facilities that cannot tolerate outages. According to Future Market Insights, the automatic transfer switch market share is expanding from USD 929.0 million in 2025 to USD 1,571.9 million by 2035 at a 5.4% CAGR, driven by increasing demand for uninterrupted power supply and technological advances in remote monitoring. Critical Infrastructure Requires Uninterrupted Power Mission-critical facilities face serious consequences when power fails. Here’s how ATS systems protect hospitals, data centres, and commercial buildings that depend on continuous electricity. Healthcare Applications An ATS switch monitors primary power continuously and initiates transfer to backup generators when it detects voltage loss. This eliminates manual intervention that could delay power restoration during emergencies. Healthcare facilities represent a substantial portion of adoption in essential services. Medical equipment like ventilators requires constant power to ensure patient safety, and emergency lighting depends on reliable backup that maintains safe conditions. Data Centres and Telecommunications Telecommunication networks and data centres must maintain connectivity during grid outages. Cellular towers support emergency services while communication hubs keep businesses operational. Data centres cannot tolerate downtime because their clients depend on continuous availability. Even brief interruptions disrupt cloud computing and financial transactions, which creates economic losses and damages reputation. The closed transition segment dominates because it maintains continuous power by briefly paralleling sources. This prevents even momentary interruptions that could damage sensitive electronics or corrupt data. Commercial Sector Drives Market Growth Commercial facilities recognize that power outages affect productivity and customer experience. Office complexes and shopping centers invest in reliability […]
En savoir plus
Top 10 des fournisseurs d’équipements électriques en Chine

17 décembre 2025

Undoubtedly, China has emerged as a global powerhouse in the electrical equipment industry. The Asian giant boasts a diverse array of companies that lead in innovation, sustainability, and technological prowess, helping engineers and designers find the right products and solutions for their specific projects. Below are the top 10 electrical equipment suppliers in China that represent the forefront of global industrial technology. Why Global Buyers Source Electrical Equipment from China From our experience working with overseas distributors and EPC contractors, China is not chosen only for cost. Buyers source from China because of: These factors explain why many international projects use Chinese brands alongside European and American suppliers. The Global Electrical Equipment Industry Landscape The global electrical equipment industry is vast and dynamic, playing a crucial role in powering the world. It includes companies that manufacture products like transformers, circuit breakers, and batteries, which are essential for energy distribution and management. Key Highlights Hero Product Highlight Multifunction Time Relay TRT8 The Multifunction Time Relay TRT8 offers 10 programmable functions and a wide range of time settings, ideal for controlling electrical appliances, motors, and other loads, with high accuracy and reliability. View Product Electrical Equipment Categories by Application Product Category Typical Application Buyer Type Circuit breakers & switchgear Power distribution EPC, distributors Industrial control & relays Automation systems OEM, panel builders Energy storage & batteries Renewable energy Integrators Meters & monitoring devices Energy management Utilities This structure reflects how buyers usually evaluate suppliers in real projects. List Top 10 Electrical Equipment Suppliers Rank Supplier Name Founding […]
En savoir plus
Pourquoi les multimètres numériques restent essentiels pour les travaux électriques modernes

14 décembre 2025

Digital multimeters continue to play a central role in electrical work because they provide the verified measurements electricians depend on for safe operation. These instruments reveal what’s happening inside circuits and help you make informed decisions about repairs and installations. Testing Confirms What Visual Inspection Misses Electrical diagnostics depends on measurement capability. When you open a panel or approach a circuit, testing confirms whether conductors are energized before you touch anything. A handheld multimeter provides the data you need to work safely and complete jobs efficiently. Before you make contact with any wire, you test to verify its state rather than relying on assumptions about breaker positions or wire colors. Daily electrical work requires: These measurements guide your next steps based on data. Code compliance also requires documentation proving installations meet voltage drop specifications. Residential Service Calls Demand Fast Diagnosis Home service calls operate under time pressure. Homeowners want their power restored during their lunch break, so you need tools that deliver answers quickly. A voltage meter provides readings in seconds. You select your function, connect the leads, and see whether you’re dealing with 120V, 240V, or no power. That information determines whether you’re replacing a breaker or checking connections. Digital displays show exact numbers without interpretation issues. Older analog instruments required careful viewing angles to read needle positions, which slowed down diagnostics and introduced reading errors. GFCI troubleshooting particularly benefits from systematic measurement. These protective devices trip for multiple reasons, so testing voltage and checking for ground faults requires capability beyond what simple test […]
En savoir plus

Chargement...

Blog

Blog

Comment les exigences de protection contre la foudre influencent la conception de la distribution basse tension

28 décembre 2025

Pourquoi les commutateurs modulaires sont-ils de plus en plus demandés pour les systèmes d'alimentation de secours ?

26 décembre 2025

Pourquoi les dispositifs de protection contre le courant continu sont essentiels pour les systèmes d'énergie solaire modernes

25 décembre 2025

Analyse du marché : Les compteurs numériques dans les systèmes électriques intelligents

25 décembre 2025

Erreurs courantes dans le choix des câbles solaires et leur impact sur les pertes de puissance

24 décembre 2025

Comparaison des conceptions de boîtes de jonction photovoltaïques pour les projets résidentiels et les projets à grande échelle

22 décembre 2025

Comment les relais statiques haute fréquence améliorent l'automatisation industrielle

21 décembre 2025

Perspectives du marché et tendances d'adoption des commutateurs de transfert automatique (ATS)

19 décembre 2025

Top 10 des fournisseurs d’équipements électriques en Chine

17 décembre 2025

Pourquoi les multimètres numériques restent essentiels pour les travaux électriques modernes

14 décembre 2025