Transformer Protection Devices Explained | Buchholz Relay, REF, Differential, OTI, WTI Working

In this video, we have explained Transformer Protection Devices in simple and easy language. ✅ What is Buchholz Relay and how it detects internal faults ✅ How Differential Relay 87T protects a transformer ✅ Working of REF Relay / Restricted Earth Fault Protection ✅ Difference between OTI and WTI and their working ✅ Over Current Relay and Earth Fault Protection ✅ Use of MOG, PRV, Sudden Pressure Relay, and Tripping Relay ✅ How Lightning Arrester protects the transformer from surge voltage ✅ How alarm and trip signals work in transformer protection This video is very useful for electricians, electrical technicians, ITI students, diploma students, and anyone working in electrical maintenance or power systems. Watch the full video to understand how a transformer is protected from burning, internal damage, pressure rise, and major faults. 📌 Topics Covered: In this video, we explained transformer protection devices including Buchholz Relay, OTI, WTI, MOG, Silica Gel Breather, PRV, Differential Protection 87T, REF Protection 64H, Over Current Protection, and DO Fuse Protection. ══════⊹⊱≼≽⊰⊹═════════⊹⊱≼≽⊰⊹══════ 📚 Welcome to Electrical Technician Training अब हर एक इलेक्ट्रीशियन बनेगा इंजीनियर! Learn Anytime, Anywhere. 📘 Books for Electricians 🔹 Zero to Hero House Wiring Book (Hindi + English) A complete step-by-step guide from basics to advanced house wiring. ✅ 184 Pages | ✅ 100+ Topics | ✅ 100+ Wiring Diagrams 💡 Covers: Fans, Lights, Inverter, MCB, Solar, RCCB & More! 💰 Price: ₹100 (PDF) 📥 Buy Now: 👉 https://wiringschool.com/product/zero... ══════⊹⊱≼≽⊰⊹═════════⊹⊱≼≽⊰⊹══════ 🔹 Electrician A2Z Wiring Book Perfect for every electrician – full of thumb rules, motor starters & wiring diagrams. ✅ 190 Pages | ✅ 100+ Diagrams | ✅ Thumb Rules + Starters 💰 Price: ₹98 (PDF) 📥 Buy Now: 👉 https://wiringschool.com/product/elec... ══════⊹⊱≼≽⊰⊹═════════⊹⊱≼≽⊰⊹══════ 📱 Download App (Electrical Technician): 👉 https://play.google.com/store/apps/de... 🎓 Online Electrical Courses 🛠 Motor Starter Course – ₹300 👉 https://electricaltechnician.akamai.n... 🔧 Electrical Wiring Master Course – ₹499 👉 https://electricaltechnician.akamai.n... ⚙ PLC & HMI Programming – ₹899 👉 https://electricaltechnician.akamai.n... 📑 How to Read Electrical Drawings – ₹999 👉 https://electricaltechnician.akamai.n... ⚙ VFD Programming & Troubleshooting – ₹999 👉 https://electricaltechnician.akamai.n... 🔍 Advanced Siemens PLC & HMI – ₹1000 👉 https://electricaltechnician.akamai.n... ⚙ Siemens VFD Programming – ₹900 👉 https://electricaltechnician.akamai.n... 💻 SCADA Programming & Designing – ₹600 👉 https://electricaltechnician.akamai.n... 🔧 Relay Logic Course – ₹900 👉 https://electricaltechnician.akamai.n... 🔄 Ceiling Fan Wiring & Repairing – ₹900 👉 https://electricaltechnician.akamai.n... ══════⊹⊱≼≽⊰⊹═════════⊹⊱≼≽⊰⊹══════ 📞 Need Help or Want to Enroll? 📱 WhatsApp: +91 8989044606 📧 Email: [email protected] ══════⊹⊱≼≽⊰⊹═════════⊹⊱≼≽⊰⊹══════ 🔔 Follow & Subscribe for More 📲 Telegram: 👉 http://telegram.dog/ElectricalTechnic... 📸 Instagram: 👉   / electricaltechnician02   ══════⊹⊱≼≽⊰⊹═════════⊹⊱≼≽⊰⊹══════ Time Stamp 00:00 Transformer Protection Devices Explained 00:36 Transformer me kaun-kaun se fault aate hain? 01:13 Buchholz Relay kya hota hai? 01:58 Buchholz Relay Internal Fault kaise detect karta hai? 04:26 Buchholz Relay Alarm aur Trip Working 05:21 OTI – Oil Temperature Indicator Working 07:13 OTI Alarm and Trip Circuit 08:27 WTI – Winding Temperature Indicator Working 09:41 OTI and WTI Temperature Setting in Transformer 13:40 MOG – Magnetic Oil Gauge Working 10:15 Transformer Oil Level Low Protection 13:41 Silica Gel Breather ka kaam 14:56 PRV – Pressure Relief Valve Working 15:57 Differential Protection 87T Working 19:35 REF Protection – Restricted Earth Fault Relay 23:32 Over Current Protection in Transformer 24:52 DO Fuse Protection Working