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⚡️ مجموعه ۸۵ دوره تخصصی مهندسی برق ⚡️ 🎬 فرمت: ویدئوهای آموزشی به زبان انگلیسی 💬 برخی دوره‌ها دارای زیرنویس انگلیسی یا زبان‌های دیگر هستند. 📂 بسته به نوع دوره، فایل‌های جانبی مانند PDF، Excel و سایر منابع آموزشی نیز ارائه می‌شوند. 📚 مشاهده فهرست ۸۵ دوره در ۵ بخش: 🔹 بخش اول | 01–17 🔹 بخش دوم | 18–34 🔹 بخش سوم | 35–51 🔹 بخش چهارم | 52–68 🔹 بخش پنجم | 69–85 🎁 تخفیف ویژه خرید بیش از ۵ دوره 📩 اطلاعات، استعلام قیمت و سفارش: @ElectricalDocumentAdmin

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Why Motor Nameplates Are So Important? Why does every motor have a metal nameplate, and why is every number on it important? ✓ Motor nameplates contain complete technical information about the motor ✓ kW rating shows the maximum mechanical power the motor can deliver ✓ Voltage rating tells the exact supply voltage required for safe operation ✓ Current rating is used to set overload protection correctly ✓ RPM shows the motor speed at full load ✓ Frequency rating tells whether the motor works on 50Hz or 60Hz supply ✓ Insulation class defines the maximum temperature the winding can handle ✓ IP rating shows protection against dust and water ✓ Engineers use nameplate data for cable sizing, protection settings and correct installation ✓ Ignoring nameplate values can cause overheating, winding failure and motor damage Disclaimer: This video is for educational purposes only. Electrical motors, industrial equipment, and power systems can be dangerous. Always follow manufacturer instructions and use proper training before installing, testing, or operating electrical equipment. #motor #motornameplate #inductionmotor #electricalengineering #electricmotor #motorexplained #industrialmotors #electricalsafety #electricityexplained ═══════════════ ⚡️ @ElectricalDocument 📚 @PowerSystemDocument ═══════════════

Why Can 1.5 mm² Wire Run Lights but Not an Air Conditioner? Why can a 1.5 mm² wire safely supply several LED lights but overheat when connected to an air conditioner? This simple electrical explanation shows how load current determines wire size, why air conditioners draw more running and starting current, and how undersized wiring produces dangerous heat. You will also learn why cable ampacity, circuit-breaker protection, installation conditions and standard wiring tables must all be considered before selecting a cable. ✓ Why lighting circuits draw relatively little current ✓ How air conditioners create higher continuous loads ✓ Why motors draw additional current during startup ✓ How excessive current heats an undersized wire ✓ Why insulation damage can cause a short circuit ✓ How to select wire using approved ampacity tables Disclaimer: This video is for educational purposes only. Required wire size depends on conductor material, insulation rating, installation method, ambient temperature, bundling, cable length, voltage drop, breaker rating, appliance specifications and local electrical codes. Consult a qualified electrician. #electricalwire #wiresize #cablesizing #wireampacity #housewiring #airconditioner #acwiring #lightingcircuit #electricalsafety #electricalfire #inrushcurrent #startupcurrent #circuitbreaker #voltagedrop #electricalengineering #electricity #electrician #wiring #electronics #scienceexplained ═══════════════ ⚡️ @ElectricalDocument 📚 @PowerSystemDocument ═══════════════

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━━━━━━━━━━━━━━━━━━ 🔧 05 | منابع تخصصی Commissioning & Maintenance مجموعه چهارجلدی: Substation Commissioning & Maintenance مناسب برای مهندسان و متخصصان فعال در حوزه‌های: Commissioning | Testing | Maintenance | HV Substation | Transmission & Distribution 📚 بیش از 1180 صفحه محتوای تخصصی 📌 مشاهده معرفی و سرفصل‌ها: 👈 هزینه ویژه تهیه 4 جلد: فقط 400 هزار تومان 👉 ━━━━━━━━━━━━━━━━━━ 🛡 06 | منابع تخصصی Protection & Relay PROTECTION SCHEMES COMPENDIUM مجموعه سه‌جلدی تخصصی در زمینه طراحی و بررسی Protection Schemes، Relay، Substation و Power System. 📚 بیش از 700 صفحه 📖 3 جلد تخصصی 👈 هزینه ویژه تهیه هر سه جلد: فقط 200 هزار تومان 👉 ━━━━━━━━━━━━━━━━━━ 📩 برای دریافت اطلاعات، نمونه فایل‌ها، قیمت و نحوه خرید هر یک از محصولات، با ما در ارتباط باشید: 👤 @ElectricalDocumentAdmin

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⚡️ How does a Buchholz relay detect internal faults in an oil-filled transformer before they become catastrophic? A Buchholz relay is a mechanical protection device installed between the transformer main tank and conservator, primarily used to detect internal faults and abnormal oil movement. 🔹 How the Alarm Stage Works ✔️ Minor internal faults → decomposition of oil and insulation generates gas → gas accumulates inside the relay and operates the upper float alarm. ✔️ Gas accumulation → oil level inside the relay falls → upper float mechanism changes position → alarm circuit is activated. 🔹 How the Trip Stage Works ✔️ Major internal faults → rapid gas generation and violent oil movement → oil surge flows toward the conservator. ✔️ Strong oil surge → lower float/paddle operates → trip circuit is activated → transformer is disconnected from the system. 🔹 Faults It Can Indicate ✔️ Winding faults → local heating, arcing, or insulation breakdown → gas generation inside the transformer. ✔️ Core faults → abnormal heating or insulation problems → dissolved gases and gas accumulation. ✔️ Oil-related abnormalities → abnormal gas formation or oil movement → warning or protection operation depending on severity. 🔹 Why It Matters ✔️ Alarm → provides an early indication of developing internal problems, allowing investigation before severe damage occurs. ✔️ Trip → rapidly isolates the transformer during major internal faults → helps limit equipment damage and reduce the risk of catastrophic failure. ⚙️ Practical Engineering Insight ✔️ A Buchholz relay is mainly applicable to oil-immersed transformers with a conservator system and is not a universal protection device for every transformer design. 🚨 Engineering Alert: This infographic may contain AI-generated technical inaccuracies, incorrect component labels, or oversimplified protection details. Always cross-check Buchholz relay operation, settings, and transformer protection schemes with applicable standards and manufacturer documentation before relying on it for engineering decisions. #ElectricalEngineering #TransformerProtection #BuchholzRelay #PowerSystems #SubstationEngineering #TransformerMaintenance 💫 @ElectricalCourse 💫

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