125 MVA Power Transformer Unloading Process | Step by Step Explanation | Electrical engineering скачать в хорошем качестве

125 MVA Power Transformer Unloading Process | Step by Step Explanation | Electrical engineering

In this video, we will take you through the entire unloading process of a 125 MVA power transformer, explaining each step in detail. This process is critical for ensuring the safe handling of the transformer from transportation to installation at the site. Power transformers are heavy, delicate, and expensive equipment, so proper unloading procedures are essential to avoid damage and ensure operational reliability. --- 📌 Step-by-Step Explanation of the Transformer Unloading Process 1️⃣ Preparation Before Unloading Before unloading the transformer, several preparations must be made to ensure safety and efficiency: Site Preparation: The transformer foundation or storage area should be leveled and free from obstructions. Load-bearing capacity of the ground is checked to support the transformer's heavy weight. Safety barriers and warning signs are placed around the site. Equipment Inspection: Unloading equipment like hydraulic jacks, cranes, or skidding systems is inspected. Load testing of cranes and lifting equipment is conducted to ensure they can handle the transformer’s weight (typically over 100 tons). Workers are briefed on the safety protocols and assigned specific roles. Transformer Inspection: The transformer is checked for any external damage caused during transportation. Shock recorders (if installed) are reviewed to detect excessive vibrations or impact forces during transit. The transformer's center of gravity is identified to ensure a balanced lift. --- 2️⃣ Positioning the Transport Vehicle The transport truck (multi-axle trailer) carrying the transformer is carefully aligned with the unloading area. Wheel chocks and stabilizers are placed to prevent any accidental movement. The transformer’s weight distribution is analyzed before initiating the unloading process. --- 3️⃣ Unloading Methods for a 125 MVA Transformer There are two primary methods used for unloading: 🅰️ Using Hydraulic Jacks and Skidding System (Common for Large Transformers) 1. Hydraulic jacks are placed under the transformer to lift it slightly from the trailer. 2. Wooden sleepers or rollers are placed underneath for support. 3. The trailer is slowly moved forward, leaving the transformer on the skidding system. 4. The transformer is then skidded (pulled) into position using winches or a hydraulic pushing system. 🅱️ Using a Heavy-Duty Crane (If crane access is available) 1. Slings and spreader beams are attached to the lifting points of the transformer. 2. A high-capacity crane (500-800 tons) is used to gradually lift the transformer. 3. The transformer is slowly moved and placed on the foundation or designated area. ✅ Safety Checks: During both methods, engineers continuously monitor: Load balance to prevent tilting. Cable tension to avoid excessive stress on lifting equipment. Communication signals between crane operators and ground personnel. --- 4️⃣ Placing the Transformer on the Foundation Once the transformer is safely lowered, it is carefully aligned with its final position. Anchor bolts or clamps are used to secure it. Vibration pads or rollers may be used to make final adjustments. --- 5️⃣ Post-Unloading Inspections Mechanical Inspection: Checking for any structural damage or misalignment. Electrical Testing: Ensuring the integrity of insulation and bushings. Oil Level & Leak Inspection: If the transformer is oil-filled, checking for leaks. --- 📌 Final Steps & Conclusion After unloading, the transformer remains in a settling period before commissioning. Additional procedures such as drying (if moisture is detected), oil filtration, and electrical tests are performed before the transformer is put into operation. This video provides a clear, step-by-step explanation of the safe and efficient unloading process of a 125 MVA transformer, ensuring smooth installation and long-term reliability. 👉 Don’t forget to Like, Share & Subscribe for more Electrical Engineering content!