6~10.5kv 2500kVA 20kv 3150kVA Oil-Immersed Distribution Transformer

Brief Introduction

This series of products feature low loss, low noisy, low temperature rising, low partial discharge and high reliability, as well as core-hoisting free and no leakage. With the approval of the National Transformer Quality Inspection and Testing Center, all the index of the transformer achieve or above the GB/T3837-2003 national standard.

Model

S  F  Z  10-×××/××

Features 

1.    Scientific and advanced design scheme

By using computer software to analyze the winding electric field under high voltage, it can calculate the exact distribution of winding electric field grads and then to make sure the winding structure can meet the impulse under high voltage. Analyzing and calculating the insulation structure of the transformer and using the scientific insulation structure to ensure the products operate safely. Analyzing and calculating the magnetic leakage and temperature field to ensure the field performance in accordance to the design demand. Optimizing the lamination design to minimize the magnetic distortion in the gap and to enhance the no-load performance.

2.    Iron Cores

The iron core adopts high quality grain-oriented cold-rolled silicon-steel sheet and is cut by a special shearing machine which result in just a tiny burr. The application of multi-steps and 45°all-leaning joints lowers the no-load loss,  no-load current, and noise efficiently. The core clamping device adopts a board structure which result in high mechanical intensity. Fasten nails can ensure enough transformer axis padding block pressure.

3.    High purity oxygen free cooper windings, reduce the load loss

The inner coil was wound directly on the insulation barrel, where chamfering spacers and padding blocks were applied to uniform the electric field and enhance stability. And, BDK-80M synchronized lifting-up equipment was applied in assembly to ensure the axial location of the windings and reinforce the axial strength.

4. Tank

Wide-width steel plate is adopted to reduce welding seams on the flat roof, folded plate type tank, it has a concise and dedicate appearance and also high mechanical strength which passed the standard positive pressure and vacuum test. In addition, special welding technology and groove type flange ensure the tank and the pipes are able of long time use without leakage. Wide plate radiation systems equipped with heavy-duty and low noise blowers raise up the heat dissipating center, improve efficiency, reduce radiating plates, and prevent leakage. It can be directly mounted on the transformer. And capsule type conservator can effectively delay the aging of the oil what is implanted in under vacuum condition to reinforce the electric strength.

5. Protection System

Pt100 thermal resistors temperature control system is generally applied in the transformer body, a pressure relief valve with contacts is equipped on the top of tank, an oil indicator with contact and vacuum relays are equipped on the conservator, and as well, the oil pressure indicator with contacts is equipped in the tank. All this equipment can be applied for signal conversion and transfer. Both HV and LV bushings are pollution-retardant porcelain oil types, which can lengthen the insulation space and be applied in high pollution conditions. Padding plates and terminal case are made of stainless steel to make an elegant appearance.


Technical Parameters
 

Performance Data of the S11-M-30~3150/10 Distribution Transformer

Performance Data of the S11-M-30~3150/20 Distribution Transformer

Performance Data of the S13-M-30~2500/10 Distribution Transformer

Performance Data of the S20-M-30~2500/10 Distribution Transformer

Performance Data of the S22-M-30~2500/10 Distribution Transformer