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How to Choose the Right RCCB Sensitivity

26th Sep 2025

The right RCCB sensitivity depends on where it will be used and what level of protection is needed. In general, 30mA RCCBs protect people from electric shock, while 100mA or 300mA RCCBs are better for equipment and fire protection. What is the purpose of RCCB application? An RCCB (Residual Current Circuit Breaker) is designed to trip when it detects leakage current. Unlike MCBs that guard against overloads, RCCBs prevent electrocution and reduce fire risk. They are essential for both residential and industrial systems. What is the difference between 30mA vs 100mA RCCB? The key difference between 30mA vs 100mA RCCB is the balance between human safety and operational stability: If your RCCB keeps tripping unexpectedly, the cause may be a sensitivity mismatch. For more details, review common RCCB tripping issues. When should you use a 30mA RCCB? A 30mA unit should be used when the primary concern is direct human protection. It is ideal for: This sensitivity reacts quickly to small leakage currents that could otherwise cause dangerous shocks. When should you use a 100mA or 300mA RCCB? For industrial buyers, 100mA and 300mA are more practical: RCCB Sensitivity Comparison Table Sensitivity Primary Use Protection Level Typical Application 10mA Very high risk areas Extreme human protection Swimming pools, medical equipment 30mA Residential & commercial Human protection Homes, socket outlets, kitchens, bathrooms 100mA Industrial circuits Mixed: some human, mainly equipment/fire Factories, machinery-heavy lines 300mA Fire & equipment Fire protection Upstream distribution boards, large installations This comparison makes it easier to select the right sensitivity based on […]
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Common Applications of AC Contactors in Industrial Automation

26th Sep 2025

Industrial AC contactor devices switch motors, HVAC equipment, and lighting systems on and off automatically. These electromagnetic switches prevent equipment damage and enable remote operation of high-power electrical loads. Industrial control devices provide safe automation capabilities in manufacturing environments. What Is an Industrial AC Contactor? An industrial AC contactor is an electromagnetic switch that controls high-current electrical circuits. Motor starter contactor applications handle industrial motor control requirements. These devices manage currents from 10A to several hundred amperes. AC magnetic contactor operation uses electromagnetic coils to move contacts. When energized, the coil pulls contacts together to complete circuits. When de-energized, contacts separate to break circuits. Contactors have advantages over manual switches. They allow remote operation from control rooms. Industrial control devices enable automated system integration and safer equipment 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 Why Do Motors Need Contactor Control? Motor starter contactors are essential for protecting motors from damage during startup and operation. Motors draw high inrush current when starting that can be 6-8 times their normal running current. Standard switches cannot handle these current spikes safely. Motor starter contactors provide controlled starting by handling inrush currents and protecting downstream equipment. They also enable remote motor control from control panels or automation systems. Remote control prevents operator exposure to high-voltage equipment. Key motor control benefits include: TOSUNlux AC unit contactor models provide reliable motor control with current ratings up to 95A for industrial applications. What Are the Main […]
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Solar PV System Protection: A Complete Guide to DC/AC Circuit Breakers, Fuses, and SPDs

26th Sep 2025

Solar PV system protection uses circuit breakers, fuses, and surge protectors to stop equipment damage from electrical faults. These devices keep solar systems safe and prevent expensive repairs. Why Do Solar PV Power Systems Need Protection? Solar panel protection prevents damage to photovoltaic systems from electrical faults and voltage surges. What does PV stand for in solar power? PV stands for photovoltaic, which converts sunlight into electricity. The sequence of operation photovolatic system starts with solar cells making DC power. This power flows through strings and arrays to inverters that change DC to AC. Each stage needs protection. Solar power circuit protection differs from regular electrical systems. Solar systems use high DC voltages up to 1500V with low fault current. Regular electrical devices cannot handle these conditions. Protection devices must comply with IEC standards and prevent equipment damage from lightning strikes or electrical faults. What Are the Main Types of Solar Circuit Protection? Solar PV systems require DC protection for high-voltage arrays and AC protection for grid connections. Each side handles different electrical characteristics and fault types. Key protection points include: TOSUNlux DC circuit breakers handle up to 6000A breaking capacity for commercial solar arrays. How Do DC Circuit Breakers Work in Solar Systems? DC circuit breakers handle the specific requirements of solar DC circuits. These devices must interrupt DC current without the natural zero-crossing that helps AC breakers extinguish arcs. TOSUNlux TSB5-63DC Circuit Breaker has a modular design with breaking capacity up to 6000A and rated voltage of 800V. It offers 1P, 2P, 3P, […]
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What Are the Best Practices for Quality Control and Testing of Electrical Components?

26th Sep 2025

Quality control and testing of electrical components are crucial for ensuring safety, reliability, and compliance with industry standards. The process involves following electrical testing standards, using reliable electronic testing equipment, and performing regular inspections. These practices help prevent product failures and guarantee consistent performance. Key Practices in Electronic Component Testing 1. Follow Electrical Testing Standards Adhering to recognized standards like IEC, IEEE, and ISO ensures consistency and safety. These benchmarks cover insulation resistance, voltage endurance, and durability. Following them helps manufacturers maintain quality across all electronic components checking processes. 2. Use Reliable Electronic Testing Equipment Investing in accurate tools such as oscilloscopes, multimeters, and LCR meters is essential. Automated test systems reduce human error and provide faster results. High-quality electronic testing equipment ensures reliable and precise measurements. 3. Perform Visual and Functional Inspections Checking for physical defects such as cracks, corrosion, or incorrect labeling is the first step. Functional testing verifies whether a component performs according to specifications. Combining these approaches strengthens the electronic circuit testing process. 4. Conduct Environmental and Stress Testing Electrical components must perform under real-world conditions. Stress tests include exposing components to temperature changes, humidity, and vibrations. These methods reveal weaknesses and help manufacturers improve durability. 5. Maintain Documentation and Traceability Recording all test results ensures compliance and accountability. Using digital tracking or barcodes simplifies recalls if issues arise. Proper documentation supports long-term reliability and adherence to electrical testing standards. FAQs Q1: Why is electronic component testing important? It ensures safety, reliability, and compliance with industry standards, reducing risks of product […]
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What International Certifications Should Low-Voltage Electrical Products Have for Global Market Access?

26th Sep 2025

Low-voltage electrical products require certifications such as CE, CB Scheme, UL, and VDE to ensure safety and compliance with global trade standards. This not only builds consumer confidence but also ensures regulatory compliance and gives manufacturers the opportunity to expand into new markets. Why Do Low-Voltage Products Need Certification? Certifications prove that electrical products meet safety, performance, and quality standards. They protect users from risks such as short circuits, fire, or malfunction. For manufacturers, certifications: For a broader overview of certification systems, check out 5 Major International Certification Bodies. CE and UL certifications are essential for safety and global market access. What Is CE Marking and Why Is It Important? CE marking is mandatory for all electrical products sold in the European Economic Area. It shows compliance with EU directives for safety and environmental protection. Without CE, products cannot legally enter the European market. For example, Tosunlux’s CE-certified low-voltage circuit breakers meet EU standards for safety and performance. Learn more in The Importance of CE, CB, and VDE Standards. CE marking ensures that low-voltage electrical products meet EU safety and environmental standards. What Is the CB Scheme? The CB Scheme, run by the International Electrotechnical Commission (IEC), helps manufacturers gain approval in multiple countries with a single test. Instead of repeating certifications in each country, one CB report can be accepted by many national bodies. This saves both cost and time. Tosunlux’s modular devices and distribution boxes are examples of products that can benefit from CB Scheme approval for multiple market entry. The CB Scheme […]
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MCB vs RCCB vs RCBO vs MCCB vs MPCB: The Ultimate B2B Selection Guide

16th Sep 2025

Key Takeaways Quick Reference Comparison Table Device Type Full Name Primary Function Protects Against Typical Application TOSUNlux Corresponding Series MCB Miniature Circuit Breaker Overcurrent Protection Overload, Short Circuit Residential, Light Commercial TSMCB Series RCCB Residual Current Circuit Breaker Earth Leakage Protection Electric Shock, Earth Fault Wet Locations, Personnel Safety TSRCCB Series RCBO Residual Current Circuit Breaker with Overcurrent Protection Combined Protection Overload, Short Circuit, Earth Leakage Modern Installations, Critical Circuits TSRCBO Series MCCB Molded Case Circuit Breaker High-Current Protection Overload, Short Circuit (High Capacity) Industrial, Commercial Feeders TSMCCB Series MPCB Motor Protection Circuit Breaker Motor-Specific Protection Motor Overload, Phase Loss, Short Circuit Industrial Motors, Pumps TSMPCB Series What is an MCB (Miniature Circuit Breaker)? A miniature circuit breaker (MCB) is an electromechanical device designed to automatically switch off electrical circuits during abnormal conditions, such as overloads or short circuits. It is one of the most commonly used electrical protection devices, serving as a fundamental component in modern electrical installations to protect both wiring systems and connected electrical appliances. Working Principle MCBs operate using a thermal-magnetic trip mechanism: Magnetic Element: An electromagnet responds instantly to short circuit faults, ensuring rapid disconnection. Thermal Element: A bimetallic strip bends when heated by excess current flow, providing protection against sustained overloads. Key Features and Benefits →Explore the complete range of MCB products supplied by TOSUNlux to over 90 countries. What is RCCB (Residual Current Circuit Breaker)? A Residual Current Circuit Breaker (RCCB), also known as a Residual Current Device (RCD), is a critical electrical protection device designed primarily to […]
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Sourcing Relays From Chinese Manufacturers: A 2025-2026 Guide

12th Aug 2025

The beautiful nation of China is among the world’s best avenues for your official relay supplier. Some of the best Chinese relay manufacturers include this professional electrical solutions brand, TOSUN Electric, as well as Xiamen Hongfa Electroacoustic, Sanyou Corporation, and Doublecircle Electronics Group, among plenty of others. At any given point in your industry’s operations, you will have to refer to the relay of manufacturers list and select which suits your needs the most. But, what are the right ways to do so? Find out in this guide with the summary below: – Why choose Chinese relay manufacturers? – How to source out relays from Chinese manufacturers – Trends in manufacturing safety relays – The TOSUNlux Difference Why Choose Chinese Relay Manufacturers? These are the primary reasons why you should go for Chinese relay manufacturers, no matter as to where you are in the world: Let’s take a look at each a bit better. It is recommended that you opt for Chinese relay manufacturers first, because of their cost-effective production. They are known to offer high-quality relays at competitive prices. Providing extensive manufacturing prowess with advanced technologies and robust supply chains, they guarantee production reliability and timely delivery. In addition, these manufacturers hold a proven track record of innovation and customization, enabling their clientele to request safety relays customized for specific requirements, which paves the way for the improvement of product performance and suitability. Tips on How to Source Out Relays From Chinese Manufacturers Follow these actionable tips and best practices when sourcing out safety […]
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How to Choose a Safety Relay Manufacturer: A SIL & PL Compliance Checklist

11th Aug 2025

Safety relays are electrical devices designed to ensure the safety and reliability of your industrial systems. In other words, this equipment takes charge of monitoring certain functions. The moment it detects errors, it initiates a controlled shutdown or other pre-determined safety action to prevent damage to the tools and workplace injuries. More often than not, you will be sourcing these relays from a professional low-voltage electrical manufacturer, such as this company, TOSUN Electric, with this equipment in the catalog. But, how do you select the best safety relay manufacturers? Find out in this guideline that will tackle the following steps: – Risk evaluations – Safety function identification – Safety relay selection – Configurations and wiring – Validation and testing Plus, you will also learn about the SIL and PL compliance checklist. Let’s begin. Step-by-Step Guide to Selecting a Safety Relay Manufacturer 1. Conduct a Risk Evaluation These assessments are the foundation when selecting the best industrial safety relay. Find protection relay manufacturers that use the toughest safety standards in the industry, considering the severity of potential injuries, frequency and duration of exposure, and the possibility of avoiding the hazard. 2. Identify the Safety Functions As soon as you’re done conducting a risk evaluation, it is time to identify the safety function. These safety function sets include: These should be determined so you know which operations must be controlled or stopped during issues along the way. Remember that each function may require a certain kind of safety relay device. 3. Select the Right Safety Relay Third […]
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Finding a Circuit Breaker Manufacturer in the United States: What to Know

10th Aug 2025

In the United States, circuit breakers are needed more than ever not only in residences, but also in industries. So, when looking for efficient circuit breaker manufacturers in USA markets, there are various things to consider. Some of the best manufacturers in this country are Eaton, Siemens, Schneider Electric, and General Electric. However, it is true that many of the products being sold there are high in cost, so other options, which are better, such as choosing a manufacturer in other countries, like China, are more feasible. What are the things to know when looking for American circuit breaker manufacturers? Let’s begin the conversation: – Manufacturer’s credibility and certification – Quality and durability of the products – Technology and innovation of circuit breakers – Range of products offered – Customization options – Customer support and after-sales service – Costs and pricing – Supply chain and lead times – Future-proof solutions and sustainability 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 1. Manufacturer’s Credibility and Certification The first and probably the most important factor to consider is whether the circuit breaker manufacturer in the United States meets global certification standards. The best-quality circuit breakers should go through the strictest quality control and product testing measures to ensure accuracy and error-free operations, especially in critical moments. It is widely recommended to select manufacturers that have obtained these certifications: CE, UL, IEC, and ISO […]
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A Look Inside: The Circuit Breaker Manufacturing Process

09th Aug 2025

Though circuit breakers are found in homes, they are, of course, also utilized in industries, such as in manufacturing, healthcare facilities, data centers, mining, oil and gas, and agriculture, among various others. But, have you ever wondered what happens inside the circuit breaker manufacturing process? Learn the steps in this guide from professional low-voltage electrical manufacturer, TOSUN Electric: – Step 1: Welding – Step 2: Assembly – Step 3: Inspection – Step 4: Electronics – Step 5: The OTS process – Step 6: Tooling 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 Step 1: Welding The first step in the ever-complex circuit breaker manufacturing process is welding. Here, as how you know it, the metal components from frames to terminals are securely attached to each other. Also, precision welding techniques and skills – such as spot, laser, or arc welding – are implemented to provide joints with strength and reliability, so they can handle high electrical loads. There are times when automated welding systems are used. Step 2: Assembly Following the welding process, the components welded will be assembled. Thus, the mechanical parts, such as the springs, levers, and housings are fitted together. This process integrates both the structural and functional elements of the breaker, ensuring that the moving parts smoothly operate under different load conditions. There are times when this step may incorporate manual labor in large-scale industrial settings. Step […]
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Blog

How to Choose the Right RCCB Sensitivity

26th Sep 2025

Common Applications of AC Contactors in Industrial Automation

26th Sep 2025

Solar PV System Protection: A Complete Guide to DC/AC Circuit Breakers, Fuses, and SPDs

26th Sep 2025

What Are the Best Practices for Quality Control and Testing of Electrical Components?

26th Sep 2025

What International Certifications Should Low-Voltage Electrical Products Have for Global Market Access?

26th Sep 2025

MCB vs RCCB vs RCBO vs MCCB vs MPCB: The Ultimate B2B Selection Guide

16th Sep 2025

Sourcing Relays From Chinese Manufacturers: A 2025-2026 Guide

12th Aug 2025

How to Choose a Safety Relay Manufacturer: A SIL & PL Compliance Checklist

11th Aug 2025

Finding a Circuit Breaker Manufacturer in the United States: What to Know

10th Aug 2025

A Look Inside: The Circuit Breaker Manufacturing Process

09th Aug 2025