TOSUNlux Blog | Inzichten in elektrotechniek en verlichtingstechnologie

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Overspanningsbeveiliging versus stroomonderbreker: wat is het verschil en waarom heb je beide nodig?

12 oktober 2025

A circuit breaker protects your wiring and prevents fires by interrupting power during an overload, while a surge protector shields your electronics from sudden voltage spikes. They serve very different purposes, and together, they form a complete protection system. In this article, we’ll break down their functions, differences, and how using both ensures your space is safe, efficient, and future-ready. What Is a Circuit Breaker? A circuit breaker is a device designed to automatically stop the flow of electricity when the system is overloaded or a short circuit occurs. Its main job is to prevent fires, equipment damage, and wiring overheating. Key Takeaways: When too much current flows through the circuit—such as when too many appliances are on one line, the breaker “trips” and cuts power. It’s reusable and can be reset after tripping. What Is a Surge Protector? A surge protector defends electronic devices from sudden spikes in voltage, often caused by lightning, power grid switching, or equipment malfunction. Key Takeaways: Think of it like a bodyguard for your devices; it won’t stop a fire, but it will stop your expensive computer or TV from frying during a power surge. Core Differences: Surge Protector vs Circuit Breaker Let’s clear up the confusion. Although both enhance electrical safety, they solve different problems. Here’s how they compare: Feature Circuit Breaker Surge Protector Main Function Cuts off power to prevent overheating and fire Diverts voltage spikes to protect electronics Type of Protection Overload and short circuit Voltage surges and spikes Location Electrical panel Wall outlet or panel […]
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Wat is een spanningsbeveiligingsrelais en hoe werkt het?

12 oktober 2025

A voltage protection relay is a safety device designed to keep electrical systems stable and prevent damage caused by abnormal voltage levels. It works by monitoring incoming power and disconnecting the circuit if the voltage becomes too high or too low. In simple terms, it acts like a vigilant guard that ensures your machines and appliances always run within safe voltage limits. Whether in factories, offices, or homes, voltage protection relays protect equipment, reduce downtime, and extend the lifespan of electrical systems. In this article, you’ll learn what a voltage protection relay is, how it works, the different types available, and why it is vital for both industrial and residential power safety. We’ll also explore how TOSUNlux products deliver outstanding performance in even the harshest power grid environments. Understanding the Role of a Voltage Protection Relay At its core, a voltage protection relay is part of an electrical circuit that continuously checks the voltage level. If it senses a deviation beyond the preset threshold, it automatically signals the breaker to trip and disconnects the circuit. This prevents equipment from being exposed to harmful conditions. Unlike circuit breakers that respond only to extreme surges or faults, a voltage protection relay is far more sensitive and precise. It can react quickly to subtle changes that might otherwise be overlooked, providing a higher degree of safety and system reliability. Key takeaways: How Does a Voltage Protection Relay Work? The working principle is simple yet powerful. The relay contains an electromagnetic coil and a switch. When the voltage stays […]
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Stapsgewijze handleiding: een contactor testen

12 oktober 2025

Testing a contactor is the safest way to know if it is working correctly or if it needs replacement. The bottom line: you test a contactor by checking its coil resistance, contact resistance, and overall operation using a multimeter. In this guide, you’ll learn exactly how to test a contactor step by step, including safety checks and troubleshooting tips. Whether you’re a beginner or refreshing your knowledge, this article will give you the confidence to work safely with electrical equipment. What Is a Contactor? A contactor is an electrically controlled switch used in circuits that handle high current, such as motors, pumps, and HVAC systems. Three key takeaways: Why Learn How to Test a Contactor? Contactors wear out over time due to heat, arcing, and mechanical stress. If not checked, a faulty contactor can cause equipment downtime, overheating, or even electrical hazards. Learning how to test a contactor with a multimeter helps you: Safety First Before Testing Working with contactors means working with live electrical systems. Before learning how to test an AC contactor, follow these precautions: Tools You Need To test a contactor properly, gather: Step 1: Visual Inspection Before using a tool, inspect the contactor for: If you see major physical damage, the contactor should be replaced immediately. Step 2: Coil Resistance Test The contactor coil is what energizes the device. Testing the contactor coil resistance shows whether the coil is healthy. A very high or infinite resistance usually means a burned-out coil. Very low resistance may mean a short circuit. Step 3: […]
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One-Stop-Shop versus gespecialiseerde leveranciers: wat is het beste voor uw elektrotechnische groothandel?

12 oktober 2025

Running an electrical wholesale business means making constant decisions about where and how you source your products. The choice often comes down to two paths: working with multiple specialized suppliers or partnering with a single one-stop-shop supplier. The short answer? While specialized suppliers can bring depth in specific areas, a one-stop-shop approach is often the more strategic option for growth, efficiency, and customer satisfaction. This article explains the differences, highlights the hidden costs of juggling multiple suppliers, and shows why working with a trusted one-stop-shop electrical equipment distributor can help you build a more profitable business. The Hidden Costs of Juggling Specialized Suppliers Specialized suppliers focus on a narrow product line, such as lighting, safety switches, or low-voltage electrical supplies. While this may guarantee expertise in that niche, it also creates challenges for wholesalers and contractors managing diverse projects. In competitive markets, where timelines and margins are tight, these hidden costs can undermine profitability. An electrical wholesale business must weigh whether the benefit of niche expertise outweighs these risks. 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 The Strategic Advantage: Partnering with a One-Stop-Shop Supplier A one-stop-shop supplier consolidates your supply chain into a single relationship. This model is designed for wholesalers and contractors who require consistent and reliable access to a diverse range of electrical products. Key Advantages: By partnering with a comprehensive electrical equipment distributor, you reduce complexity while […]
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Topfabrikanten van AC-contactors in China [Gids 2025]

26 september 2025

The top AC contactor manufacturers in China include TOSUNlux, WEAG Electric, CNC Electric, C&J Electrical, and GuangPu Electrical. These companies produce contactors for motor control and industrial automation with international certifications. Here’s what each company offers, their product ranges, and key specifications to help you choose the right AC contractor supplier: Top Chinese AC Contactor Manufacturers at a Glance Company Key Highlights Location TOSUNlux Industry leader since 1994, global reach 93 countries, premium INTERTEK certification Wenzhou/Shenzhen WEAG Electric 20 years experience, IEC compliance, technical support China CNC Electric Since 1988, 130+ countries, full product range Wenzhou C&J Electrical 20+ years, custom solutions, 50+ countries Zhejiang GuangPu Electrical Since 2002, customization specialists Yueqing TOSUNlux TOSUNlux has been manufacturing electrical products since 1994 and operates production facilities in Wenzhou and Shenzhen. We serve 93 countries through 51 appointed agents worldwide. Our AC contactor range includes a wide variety of models for different applications. For example, we offer the TSC-D series that handles up to 660V AC and rated currents from 9A to 95A. It also features delay timing, mechanical interlocking, and star-delta starting when combined with auxiliary contact blocks. Key TSC-D series features: We also offer the TSC1-K contractor with currents from 6A to 16A. All our contactors work with 220V to 660V AC systems and come with comprehensive certifications, including CE, CB, TUV, and IRAM. Hero Product Highlight Professional AC Contactor Manufacturer The High-Quality and Low-Cost Solution for Your AC Motor Switching and Protection Needs View Product WEAG Electric WEAG Electric has worked in electrical power […]
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Veelvoorkomende problemen met AC-contactors en hoe u ze kunt oplossen

26 september 2025

AC contactor troubleshooting means figuring out why your contactor isn’t working right. Bad contactor symptoms include buzzing sounds, overheating, and your AC compressor contactor not switching your equipment on or off properly. What Are the Signs Your AC Contactor Is Going Bad? Your AC contactor will give you warning signs before it completely fails. Catching these bad contactor symptoms early saves you money and prevents your system from breaking down completely. Strange Noises and Sounds A good AC contactor runs quietly when it switches on and off. If you hear buzzing or humming sounds, something’s wrong. This usually means the coil inside is starting to fail or isn’t getting enough power. Chattering sounds happen when the contactor tries to close but can’t stay closed. The contacts keep bouncing open and shut rapidly. Dirt buildup can also make your contactor noisy. Equipment Won’t Start or Stop Properly When your AC compressor contactor fails, your air conditioner won’t start up. You might hear the outdoor unit trying to start but it shuts right back off. Sometimes the opposite happens – your equipment stays on all the time because the contacts get stuck together. If your system randomly turns on and off by itself, the contactor contacts are probably worn out. This gets worse over time until the contactor stops working completely. Visual Signs of Damage Look at the metal contact points inside your contactor. If they’re black, burned, or have little craters in them, they’re shot. These damaged contacts can’t make a good electrical connection anymore. Check […]
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Uitleg over de onderdelen en interne structuur van AC-contactors

26 september 2025

AC contactor parts include the electromagnetic system, contact system, arc extinguishing components, and housing assembly that work together to control electrical circuits. Understanding each contactor diagram component helps with maintenance, troubleshooting, and proper installation. What Are the Main AC Contactor Parts? Every AC contactor contains four essential systems that enable electrical switching: Each AC contactor part serves a specific function in the switching operation. Hero Product Highlight Professional AC Contactor Manufacturer The High-Quality and Low-Cost Solution for Your AC Motor Switching and Protection Needs View Product What Does the Electromagnetic System Do? The electromagnetic system contains the electromagnetic coil and iron core. When the electromagnetic coil is energized, it generates a magnetic field to attract the iron core action. This magnetic field magnetizes the iron core and generates electromagnetic suction, which overcomes the reaction force of the spring. Common coil voltages include: When the movable iron core and the static iron core are absorbed, the main contact connected to it is driven to close. How Do the Contact Systems Work? The contact system has the main contact and auxiliary contact. The main contact is used to connect and disconnect the main circuit and bears a large current. Main contacts handle different current levels like 10A, 20A, 40A and other specifications. Auxiliary contact is mainly used for signaling in the control circuit. The auxiliary contact current is smaller compared to main contacts. They provide signals to indicate contactor position in your control system. Why Do You Need Arc Extinguishing Components? Arc extinguishing system is used to […]
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Hoe importeer ik elektrische goederen uit China?

26 september 2025

To import electrical goods from China, you need to find a verified electrical equipment supplier, obtain proper certifications, and handle shipping documentation. The process typically takes 30-60 days and can reduce costs by 40-70% compared to domestic suppliers. Key steps include supplier verification, sample testing, contract negotiation, and customs clearance. What Documents Do You Need for Importing Electrical Equipment? Import documentation requirements are standardized but critical for smooth customs clearance. Missing or incorrect paperwork causes delays and additional costs. Prepare these essential documents before shipping: Keep copies of all supplier contracts and purchase orders for customs review. How Do You Find Reliable Switchgear Manufacturers? Start your search on established B2B platforms like Alibaba, Made-in-China, and Global Sources. Look for suppliers with verified business licenses and at least 5 years of export experience. Check their product catalogs to ensure they manufacture your specific electrical components. Request factory audit reports or conduct virtual facility tours. Verified manufacturers will readily share their production capabilities and quality control processes. Ask for customer references from your target market region. Sample orders help verify product quality before committing to larger purchases. Watch for warning signs that indicate unreliable suppliers during your research process: 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 Are the Import Costs and Duties? Total import costs include more than just the supplier’s quoted price. Plan for significant additional expenses that can add […]
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Hoe word je distributeur van een Chinees elektrotechnisch merk?

26 september 2025

To become a distributor for a Chinese electrical brand, you need to research brands, prepare a business plan, and build relationships with manufacturers. The complete process typically takes 6-12 months from initial research to signed agreement. You’ll need $100,000-300,000 in startup capital for most electrical distribution businesses. Why Should You Partner with a Chinese Electrical Brand? Chinese electrical brands offer major advantages for distributors looking to compete effectively in their markets. The biggest benefit is cost savings of 30-50% compared to Western competitors, which Chinese manufacturers achieve through efficient supply chains and large-scale production capabilities. Another major advantage is their focus on technology innovation. Companies like Haier and Gree invest heavily in smart home technology and energy-efficient products, which means you can offer customers the latest products they’re looking for. Manufacturing reliability also ensures that products are always in stock when customers need them. Chinese manufacturers can handle large orders while maintaining steady supply chains, helping you build trust with customers who depend on consistent product availability. What Are the Electrical Distributor Requirements? Becoming an electrical distributor involves meeting several types of requirements that ensure you can operate safely and legally. These fall into three main categories: 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 Are the Steps to Become a Distributor for a Chinese Electrical Brand? The distributor process follows five main steps. Each step builds toward a formal […]
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Wie zijn betrouwbare leveranciers van laagspanningsstroom in China?

26 september 2025

Reliable one-stop suppliers of low voltage electrical supplies in China include TOSUNlux, Shanghai EBASEE Electric Co., Ltd., and CNC Electric. These companies provide complete product ranges, hold international certifications, and support overseas buyers with logistics and technical expertise. What is a one-stop low-voltage electrical supplier? A one-stop low-voltage electrical supplier provides products and services for systems operating at 600 volts or less. These systems are used in homes, offices, factories, and renewable energy projects. The advantage is that buyers can work with a single partner instead of coordinating multiple vendors. Why choose a one-stop supplier for low-voltage projects? Working with a one-stop supplier has several practical benefits that make projects easier to manage. This combination of efficiency, cost savings, and technical expertise makes one-stop suppliers attractive for overseas buyers. What counts as low-voltage in electrical systems? Low voltage generally refers to any system operating at 600 volts AC or below. These systems are essential in: By covering such a wide scope, low-voltage products form the foundation of modern electrical infrastructure. What factors define a reliable supplier? Not all suppliers are equal. Reliability is measured by a mix of product quality, service, and global reach. Checking these factors helps businesses identify suppliers that can support both short-term projects and long-term growth. Who are reliable one-stop low-voltage electrical suppliers in China? Several Chinese companies have built strong reputations as reliable global suppliers. Here are three leaders worth considering. TOSUNlux TOSUNlux has over 30 years of experience in manufacturing and exporting low voltage electrical products. Our catalog covers […]
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