Блог TOSUNlux | Взгляд на электротехнические и светотехнические технологии

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В чем разница между MCB переменного тока и MCB постоянного тока?

26th Мар 2026

AC MCBs and DC MCBs may look similar, but they are not designed for the same electrical conditions. The difference is not only the current type. Arc interruption, polarity, breaking behavior, and application environment all affect whether the breaker is suitable for the circuit. For buyers, the most important point is simple: an AC breaker should not be selected for a DC circuit just because the current rating looks similar. This guide explains the practical difference and when each type should be used. Key Differences Between AC MCB and DC MCB The following table highlights the main differences between AC and DC MCBs based on structure, applications, and technical specifications: Feature AC MCB DC MCB Current Type Alternating Current (AC) Direct Current (DC) Arc Suppression Handles arc interruption more easily Requires larger arc suppression mechanism Applications Used in homes, offices, and AC circuits Suitable for solar, battery, and DC circuits Breaking Capacity Lower, due to easier arc suppression in AC Higher, to manage steady DC current Polarity Sensitivity Not polarity sensitive Polarity sensitive Lifespan Longer in AC due to arc dissipation Shorter as DC arcs wear components faster How to Choose the Right Breaker for the Application Choose an AC MCB for standard low-voltage AC distribution circuits in homes, commercial buildings, and general industrial panels. Choose a DC MCB for solar applications, battery energy storage systems, DC combiner boxes, and other circuits where the load and source are both direct current. Before ordering, confirm the system voltage, current, number of poles, installation layout, and the […]
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Как выбрать номинал MPCB для автоматического выключателя защиты двигателя?

25th Мар 2026

Фотоэлектрический датчик — это устройство, которое используется для отслеживания объектов и автоматизации их укладки и хранения. В фармацевтике фотоэлектрические датчики помогают объединять и связывать рецепты и предотвращают ошибки.
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Разница между автоматическим устройством ввода резерва и переключателем резерва

24th Мар 2026

When a project needs to switch between utility power and a backup source, the real question is not simply “which switch is better,” but “how much automation does the system need?” An automatic transfer switch is usually selected when the system must detect power loss and transfer the load with minimal manual action. A changeover switch is often selected when the source switching itself is required, but generator start-stop control or automatic monitoring is not. This article compares the two from a practical project perspective, including switching logic, downtime risk, generator coordination, and typical use cases. Understanding the Basics: ATS vs. Changeover Switch Let’s start with what they are. An automatic transfer switch (ATS) is a smart device. It continuously monitors your main power supply and, when an outage or drop is detected, it automatically switches to your backup source (usually a generator) and can even start the generator itself. A changeover switch, on the other hand, simply shifts the power connection between two sources. It can be manual or automatic, but most basic models don’t start or stop a generator—they just switch the power lines once the alternate source is already running. In short, an ATS offers automation and speed, while a changeover switch focuses on simple source switching without generator control. How Each Device Works Automatic Transfer Switch (ATS) An ATS stays on alert 24/7. It’s wired into both your utility and backup power lines. An ATS automatic transfer switch changeover system instantly responds when it detects a power outage or voltage drop. […]
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Механический таймер: типы, способы использования и многое другое

24th Мар 2026

A mechanical timer switch, also referred to as an analog timer switch, is a timing device that employs physical components like springs, gears, and electric motors to regulate the power supply to an electrical device. To learn more about this device, here’s a practical guide to get started. How Does A Mechanical Timer Switch Work? Operating in an analog manner, it utilizes clockwork mechanisms to determine when to switch the power on and off. This type of timer switch is manually configured by adjusting a knob to set the desired time interval for powering on or off. Although mechanical timer switches are cost-effective and straightforward to configure, they may be larger and require more maintenance due to the utilization of moving parts. Commonly employed for managing lighting, appliances, and other electrical devices, they offer an economical means of automating various systems. Despite the emergence of more intricate digital and electronic timers, mechanical timer switches remain a simple and budget-friendly option for overseeing lights and other devices. Types of Mechanical Timers Mechanical timer switches can be categorized by several factors. Understanding these types helps you choose the right model for your specific application. By Time Cycle By Installation Method By Number of Channels By Contact Capacity Where Mechanical Timer Switches Are Used Mechanical timer switches are versatile devices used for various purposes. Here’s a breakdown of their uses and benefits: Despite the presence of digital timer switches, mechanical timer switches continue to be a popular choice due to their affordability and straightforward operation. How to Use Mechanical […]
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RCD vs RCCB vs RCBO: What’s the Difference and How to Choose?

24th Мар 2026

Узнайте все об устройстве защитного отключения (RCD) или автомате защитного отключения (RCB/RCCB) в этом подробном руководстве. Узнайте об их принципах работы, их важности для защиты бытовых и промышленных устройств от короткого замыкания и поражения электрическим током, а также о том, как выбрать идеальное устройство для ваших нужд и бюджета.
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Защита солнечных фотоэлектрических систем: полное руководство по автоматическим выключателям постоянного и переменного тока, предохранителям и УЗИП

23rd Мар 2026

Solar PV system protection is not handled by one device alone. A complete system usually needs coordinated protection on both the DC side and the AC side, including breakers, fuses, and surge protective devices. In practical projects, the protection design should match the location of the fault risk: string circuits, combiner boxes, inverter inputs, inverter AC outputs, and grid connection points all require different protection logic. This guide explains where each device is used, what problem it solves, and what buyers should confirm before selecting protection components for a PV installation. Why Do Solar PV Power Systems Need Protection? PV systems face a different protection challenge from standard low-voltage AC distribution. The DC side can operate at high voltage; the fault current behavior is different, and the arc is harder to interrupt than in AC circuits. Protection is therefore distributed across the system. String fuses help limit reverse current risk between parallel strings. DC circuit breakers provide isolation and fault interruption. SPDs reduce the impact of transient overvoltage, especially in exposed outdoor installations. On the inverter output side, AC breakers protect the connection to the load or grid. A good PV protection design is not only about preventing damage. It also helps maintenance teams isolate sections safely, reduces downtime, and supports compliance with project requirements. 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 […]
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3-полюсные и 4-полюсные разъединители: когда и как использовать каждый из них

22nd Мар 2026

In a three-phase system, the choice between a 3-pole and a 4-pole isolator switch depends on one key question: Does the neutral also need to be disconnected? A 3-pole isolator disconnects the three live conductors only. A 4-pole isolator disconnects the three phases plus the neutral, which is often preferred in generator connections, PV systems, TT earthing arrangements, and installations with sensitive electronic loads. This guide explains the practical difference when each option is used, what mistakes to avoid, and how to make a safer selection for industrial and commercial projects. 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 Understanding the Basics: What Is a 4-Pole Isolator Switch? A four-pole (4P) isolator switch is an electrical disconnect device that isolates four conductors simultaneously—usually three live wires (R, Y, B) and one neutral. This type of isolator is designed for systems where it’s essential to disconnect the neutral along with the phases, such as in TN-C-S earthing systems or solar installations. Comparing 3-Pole and 4-Pole Isolator Switches Feature 3-Pole Isolator Switch 4-Pole Isolator Switch Number of Conductors 3 (Phases R, Y, B) 4 (Phases R, Y, B + Neutral) Neutral Isolation Not Included Included Application Use Standard 3-phase loads Critical loads, solar, and generator systems Safety Level Medium High (complete disconnection) Compliance Requirement Basic Often required for grid-tied applications How to Decide Between 3-Pole and 4-Pole in Real Projects The selection is […]
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Как выбрать трехфазный автоматический выключатель для промышленного двигателя

20th Мар 2026

Selecting the right 3-phase motor circuit breaker is one of the most critical decisions in any industrial electrical system. One wrong breaker can mean downtime, damage, or even a fire — so you must match the breaker to the motor’s current, load type, voltage, and environment. When running industrial motors, one wrong breaker can mean downtime, damage, or even a fire. So if you’re asking “How do I select the right 3-phase circuit breaker for my motor?” — the answer is this: you must match the breaker to the motor’s current, load type, voltage, and environment. This article will show you exactly how. We’ll cover why generic breakers won’t cut it, how to size a breaker properly, and the four essential specs to look for. You’ll also learn why TOSUNlux circuit breakers are trusted worldwide for industrial circuit protection. Whether you’re setting up a new 3-phase breaker panel or upgrading your current motor setup, this guide is your go-to reference. Why a Generic Circuit Breaker Isn’t Enough for Your Motor Motors aren’t like lights or outlets. They surge at startup, run continuously under load, and can overheat if protection fails. That’s why a 3-phase motor circuit breaker is designed with motor-specific trip characteristics that prevent false trips while still cutting power during real faults. A regular residential breaker often can’t handle: In short, using a generic breaker on an industrial motor is like using a toy wrench on a jet engine — it’s not built for the job. That’s where a true industrial circuit breaker […]
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Мультиметр и вольтметр: в чем разница

19th Мар 2026

Multimeters can measure voltage, current, resistance, and other parameters. Some voltmeters, particularly portable ones, are powered by the measured voltage source, which highlights their operational mechanisms within electrical work environments. Voltmeters specialize in voltage measurements only, but provide greater accuracy. Choose multimeters for versatility or voltmeters when precision voltage readings are critical. For those working with electrical systems, there is frequently a need to measure elements such as current, voltage, and resistance. Two prevalent instruments used for handling such requirements are the multimeter and the voltmeter. Within this guide, we aim to contrast these two analytical appliances and bring to light their key variances to facilitate selecting the most appropriate for your intended applications. What Is a Multimeter? A multimeter is a handy tool used to measure different electrical quantities like voltage, current, resistance, and continuity — making it essential for electrical troubleshooting in both residential and industrial settings. A handheld digital multimeter is particularly useful for electricians and HVAC specialists for taking measurements and troubleshooting in the field. It’s like having three tools in one! You can think of it as the Swiss Army knife of electrical testing. Key Features: Voltage, Current, Resistance & Continuity Testing Why Use a Multimeter? Common Uses of a Multimeter Home Repairs: Check if batteries are still good or if electrical outlets are working. Automotive Work: Diagnose electrical problems in cars — including testing alternator output, checking battery health, and tracing short circuits without specialized equipment. Electronics Projects: Test and troubleshoot circuits in DIY electronics projects. A handheld digital […]
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MCCB Types Explained: Type B, C, D, K, Z — How Each Works & When to Use Them

18th Мар 2026

Существуют различные типы автоматических выключателей, и вам необходимо знать, как они работают, чтобы правильно их установить. Эти автоматические выключатели сгруппированы в различные типы: тип B, тип C, тип D, тип K и тип Z. MCCB типа B срабатывает при скачке тока в 3–5 раз больше номинального, а тип C срабатывает при скачке тока в 5–10 раз больше. MCCB — это превосходное устройство электрозащиты. Его корпус герметичен и не может быть открыт. Но, как и любое другое электрооборудование, он требует периодического обслуживания для правильной работы. Обзор продукта Hero Автоматический выключатель в литом корпусе TSM2 Автоматический выключатель в литом корпусе TSM2 обеспечивает высокую производительность для защиты от перегрузки и короткого замыкания, что делает его идеальным для промышленного и коммерческого применения. Просмотр продукта MCCB могут выдерживать большой ток и короткое замыкание. Они также имеют подвижный расцепитель и короткое время срабатывания. Некоторые типы имеют функции дистанционного включения/выключения, что делает их полезными в промышленных условиях, где поражение электрическим током является распространенной опасностью. Различные типы MCCB используются в различных электрических установках. Если вы хотите узнать о различных типах MCCB и о том, как они работают, продолжайте читать эту статью. Как работает MCCB? MCCB предназначены для автоматического прерывания потока электроэнергии при обнаружении неисправности. Они состоят из нескольких ключевых компонентов, таких как блок отключения реле, термочувствительные компоненты, такие как биметаллическая полоса, и дугогасительные контакты. Сочетание этих функций […]
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