Découvrez les ponts redresseurs, leur construction, leurs principes de fonctionnement et leurs avantages. Découvrez comment ces appareils sont utilisés dans diverses applications telles que les alimentations à découpage, les alimentations linéaires et les équipements de soudage.
En savoir plus
In electrical engineering, a high-performance circuit breaker is essential for system protection against overloads and short circuits. However, many engineers and distributors think that the capacity ratings printed on a breaker’s label apply universally. This may lead to fire hazards if not calculated properly. Actual circuit breaker performance is not a static value. Standard ratings are calibrated at sea level in a controlled environment with temperatures from 30°C to 40°, as defined by IEC 60947-2. Real-world installations may not match these controlled environments due to a lot of factors, such as ambient temperature, high altitude, and humidity. This article helps you understand how environmental factors trigger “derating,” which is essential for long-term breaker reliability and system safety. Factors to Consider in Temperature Derating Temperature derating refers to a necessary reduction in a circuit breaker’s functional current rating when conditions differ from calibration standards. Among the factors to consider are temperature, humidity, and high altitude, which affect the breaker’s reliability. 1. Ambient Temperature Most Miniature Circuit Breakers (MCBs) and Molded Case Circuit Breakers (MCCBs) use a thermal-magnetic tripping mechanism. When excess current heats the bimetallic strip, it bends and trips the mechanism. On the other hand, when the surrounding ambient temperature rises above the standard, the bimetallic strip pre-warps. This causes the breaker to trip at a current lower than its normal rating, known as temperature derating. But, in extremely cold environments, dangerous overcurrents may flow through the breaker because there is not enough heat to deform the strip. Tosunlux’s solution is to utilize flame-retardant PC […]
En savoir plus
In the field of industrial electrical systems, the Molded Case Circuit Breaker Frame Size is designed to house the circuit breaker. The size of the frame depends on the physical and mechanical limits of the breaker. Choosing a Molded Case Circuit Breaker (MCCB) does not only mean matching the voltage and amperage. The entire electrical distribution system relies on the frame to determine its physical integrity, safety, and longevity. This guide will help you understand MCCB Frame Size and how it relates to the electrical panel design. What is MCCB Frame Size? An MCCB frame is just like the chassis of the truck. If a truck’s chassis can handle half a ton, you can use it to carry lighter loads that do not exceed half a ton. However, if you carry more than that, even if you tune the engine, the axle will snap. The MCCB has two main parts: the frame and thetrip unit. The frame is the physical plastic box that houses the heavy copper parts. It is designed to handle a specific range of heat and electricity without melting or exploding. The Trip Unit, or the trigger, is the brain inside the box. When it senses too much power, it “flips” the switch to avoid explosions. Manufacturers designed standard frame sizes with standardized dimensions for different trip units. This means that contractors do not have to change the plastic box every time they change or upgrade the current. Below are the standard sizes according to current: Impact on Enclosure Space and Layout […]
En savoir plus
Pushbutton switches play a vital role in various electrical applications, offering reliable and simple control over electrical circuits. However, over time, these switches can encounter issues that hinder their functionality. In this article, we will delve into common problems faced by pushbutton switches, including wall pushbutton switches, and provide practical solutions to restore their functionality. Push Button Switch Failure in Industrial Environments In tough industrial settings, pushbutton switches are key parts of daily operation. They are used in control panels and motor starters. In these places, they face repeated use, strong vibration, and contact with dust, oil, or moisture. They may control complex machines. They may also be the main control for distribution cabinets. In all cases, these switches must keep good electrical contact so the system works properly. Problems in these settings often come from worn contacts or dirt and moisture getting inside the switch. For example, when emergency stop systems fail, this is not a small problem. It is a serious safety risk. It can stop production and put workers in danger. To reduce downtime and keep equipment running, it is important to choose industrial-grade switches made for heavy use. If you use strong designs and check these switches often, operations stay stable and sudden power loss is less likely. Common Problems of Push Button Switches Pushbutton switches may face four major issues: jamming, intermittent response, arcing, and physical damage. Understanding these problems will help in troubleshooting and maintaining the switches. Sticking or Jamming Buttons Jammed or sticky buttons are a common issue. […]
En savoir plus
Dans ce guide du débutant, vous apprendrez ce qu'est une boîte de jonction étanche, comment l'installer et comment l'utiliser pour protéger vos connexions électriques des conditions météorologiques difficiles. Suivez ces étapes simples pour vous assurer que votre câblage électrique est sûr et sécurisé à l'extérieur.
En savoir plus
To use a timer switch, set the current time, program the ON and OFF times, switch to AUTO (timer) mode, and test. If installing a wall timer switch, turn off power at the breaker, identify line/load/neutral/ground wires, connect to the correct terminals, then program and verify operation. What is a timer switch? Welcome to a guide on how to make the most of your timer switch, also known as a switching timer or automatic light switch with a timer. Whether you’re looking to set up a timer switch for outdoor lights or explore the versatility of a timer for a wall switch, this walkthrough will help you navigate the process with ease. Learn the simple steps to program your timer switch and enhance the convenience, energy efficiency, and automation in your home. Let’s delve into the world of timer switches and discover how they can effortlessly manage your lighting schedules. Before you start (identify your timer type) This helps you avoid the most common “it doesn’t work” issues. Also check whether it’s: How to Use or Set a Switching Timer Using a timer switch is a straightforward process. By following these steps, you can easily set up and enjoy the convenience of automated control for your electrical devices. Here’s a step-by-step guide on how to use a timer switch: Step 1: Plug In Your Device Connect the electrical device you want to control (like a lamp or fan) to the timer switch. Step 2: Set the Current Time Adjust the timer switch to the current […]
En savoir plus
Quick Answer If you’re short on time: the “best” solar inverter manufacturer depends on your system type (grid-tied / off-grid / hybrid), project size (residential / C&I / utility-scale), and the required certifications + local service. To shortlist brands quickly, compare: For a full explanation of inverter types, read: Types of Solar Inverters Looking for Top-Tier Solar Inverters? Choosing the best inverter is essential for powering your solar energy system. The volume of global PV inverter shipments can influence how industry reports discuss “top manufacturers,” but rankings vary by year, region and metric (shipments vs revenue vs segment). We have curated a list of solar inverter manufacturers recognized for innovation, efficiency, and reliability. Whether you’re installing a residential or commercial system, these brands provide proven technologies for stable performance. Hero Product Highlight electrical supply wholesaler Discover a full range of electrical products from a trusted electrical supply wholesaler. TOSUNlux offers circuit breakers, contactors, switches, and more for global markets. View Product What is a Solar Inverter? A solar inverter is an essential component of any solar power system. Its primary function is to convert direct current (DC) electricity generated by solar panels into alternating current (AC) electricity, which is used to power homes and businesses. This conversion process transforms DC power into AC power, making it usable for household appliances and the electricity grid. Without an inverter, the energy harnessed by solar panels cannot be effectively utilized. Modern inverters may also include advanced features such as system monitoring, energy storage integration, and smart energy management—designed […]
En savoir plus
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
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
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 plusTél. : +86-577-88671000
E-mail: ceo@tosun.com
Skype : àsunelectric
Wechat : +86-139 6881 9286
WhatsApp : +86-139 0587 7291
Adresse : Salle n° 1001 Wenzhou Fortune Center, Station Road, Wenzhou, Chine
Envoyez-nous un WhatsApp
: +86-139 0587 7291
Anglais
Espagnol
Russe
Français
العربية
Portugais du Brésil
Ukraïnské
turc
Polonais
Néerlandais
Italien
Indonésien
shérif
اردو
አማርኛ
Հայերեն
ไทย
Mongol
فارسی
Shqip
Élagueur