2500 kVA Pad Mounted Distribution Transformers-25/0.6 kV | Canada 2024

Energy-saving and efficient, protection around the clock – Three-Phase Pad-Mounted Transformer ensures worry-free power supply!

01 General

1.1 Project Description

SCOTECH manufactured 2 units of the 2500 kVA pad mounted transformer to Canada in 2024. The rated power of the transformer is 1000 kVA with KNAN cooling, with the primary voltage 25GrdY/14.4 kV to secondary voltage 0.6y/0.347 kV. they formed a vector group of YNyn0. This pad mounted transformer produced by our company can be used for ring network and terminal power supply mode, and the conversion is flexible and convenient. The elbow type cable connector can be plugged and inserted more than 15 times at 200A load current, and is used as a load switch in emergency situations, and has the characteristics of isolation switch.

We ensure that each one of our delivered units has undergone rigorous full acceptance testing. We provide one-package service from consulting, quoting, manufacturing, installation, commissioning, training to after sale services, our products are now operating in more than 50 counties in the world. We aim to be your most reliable supplier as well as your best partner in business!

1.2 Technical Specification

1000 kVA pad mounted transformer specification and data sheet

1.3 Drawings

2500 kVA pad mounted transformer diagram drawing and size.

02 Manufacturing

2.1 Core

The transformer core production process mainly includes the following steps: Material preparation: Select high-quality cold-rolled silicon steel sheet and cut it to appropriate size according to design requirements. Stacking: After coating the silicon steel sheet with film insulating paint, stack the silicon steel sheet one by one according to the E type, C type or ring structure to form the core column and iron yoke. Spot welding or binding: The silicon steel sheet is fixed together by spot welding or non-metal binding to prevent each other from moving due to the electromagnetic force during operation. Through the core or set winding: according to the transformer design, the winding through the core column or set on the core. Inspection and treatment: Check the flatness, clearance and insulation status of the iron core, and correct and supplement insulation treatment if necessary. Assembly and packaging: Assemble the iron core, winding, clamping and other components into a complete transformer core assembly, and package processing to ensure good electrical insulation and mechanical stability.

2.2 Winding

Low voltage foil winding Axial current distribution adjusts freely Reduces shearing forces After winding, the Prepreg is stuck over the conductor sheet to form a compact tube by a tempering process. High voltage winding Fully and semi-automatic winding machines Enamel-insulated winding wire with steady winding pull on carrier cylinder, or directly on the LV winding Layer insulation of high-quality cable paper Covering bandage made of shrinking foil for compact winding with good short-circuit response and optimum impulse voltage distribution

2.3 Tank

The transformer tank should be welded with high strength steel plate. Anti-magnetic shielding measures should be taken inside the fuel tank to reduce stray loss. The fixation and insulation of the magnetic shield should be good to avoid overheating or discharge due to poor contact. All kinds of electrical shields should be conductive and grounded reliably to avoid suspended discharge or affect the dielectric loss factor of the winding. The fuel tank should have reliable strength and be able to withstand the mechanical strength test with a vacuum of 133Pa and a positive pressure of 98kPa. The fuel tank should not be damaged or permanently deformed to meet the negative pressure of the transformer vacuum oil injection and the positive pressure in operation. The oil tank should be strictly sealed to meet the requirements of no leakage after the transformer oil injection. The oil tank should have accurate shape and position accuracy to meet the quality requirements of the transformer assembly. The strength of the oil tank determines the tightness and installation accuracy of the oil tank. When the strength of the oil tank is not enough to cause deformation, flanges, pipelines, positioning parts, etc. will cause deformation, and the tightness and installation accuracy will be affected.

2.4 Final Assembly

The transformer assembly process covers the preparation stage to ensure that the required materials and tools are available; Carry out transformer hoisting, accurately adjust the high and low voltage sides; install accessories, such as casing, oil pillow, etc.; Perform vacuum pumping and oil filling operations.

03 Testing

1. Ratio on all connections and tap positions

2. Angular displacement

3. No-load losses at 100% rated voltage

4. Exciting current at 100% rated voltage

5. Load losses and impedance at rated current

6. Applied voltage

7. Induced voltage

8. Transformer tank leak-detection test.

9. A continuity test

04 Packing and Shipping

05 Site And Summary

Thank you for your interest in our three-phase pad-mounted transformer! With its efficient and stable performance, outstanding safety, and durability, this product is widely used in industrial, commercial, and public power distribution systems, providing reliable power supply and optimized energy solutions for our customers. We are committed to delivering top-quality products and professional services. We look forward to working with you to create a sustainable future in the power industry! For more information, please feel free to contact us at any time!