CEEG's S(B)/SH(B) series oil-immersed distribution transformers are developed on a proprietary 3D parametric design platform, using carefully selected low-loss silicon steel laminations or amorphous alloy strip materials, combined with an independently optimized high-strength insulation system. The result is a product line defined by four core strengths: low losses, low noise, leak-free operation, and high short-circuit withstand capability — making it well suited for industrial facilities, business parks, urban and rural distribution networks, and rail transit auxiliary power applications.

1. Ultra-Low Loss Design

The silicon steel core variants employ high-permeability cold-rolled silicon steel with a fully automated multi-step mitered joint lamination process, supplemented by integral pressure-applied PET banding, which effectively reduces both no-load losses and no-load current. The amorphous alloy variants utilize premium amorphous ribbon material, achieving significantly lower no-load losses compared to conventional silicon steel core designs.

2. Zero-Leak Sealing Integrity

Tank fabrication is carried out on a German JORG automatic corrugated tank production line, producing a seamless, integrally formed tank body. This is complemented by a full-vacuum online oil-filling process and one-piece molded acrylate sealing gaskets. Each unit undergoes dual leak testing — positive-pressure retention and negative-pressure vacuum detection — while the flange groove structure provides an additional layer of sealing assurance, eliminating the risk of leakage at the source.

3. Low-Noise Operation

A low magnetic flux density design is adopted throughout, with lamination precision controlled by Swiss stacking machinery. Combined with a robust clamping and bracing structure and purpose-engineered vibration damping measures, the transformers deliver quiet, stable operation well suited to noise-sensitive environments such as industrial parks and urban grid installations.

4. High Short-Circuit Withstand Performance

Windings are wound with semi-hard copper conductor. The complete winding assembly is sleeved and continuously compressed throughout the manufacturing process to ensure assembly precision. Core clamping components are designed and optimized against maximum short-circuit mechanical forces, providing a structurally sound assembly capable of withstanding sudden short-circuit events with confidence and sustained operational reliability.

5. Smart, Lean Quality Control

A fully digitalized end-to-end traceability system is integrated across the entire production process, paired with automated finished-product testing equipment that enables real-time data comparison and analysis. This ensures consistent performance across every unit produced and supports the demands of long-term continuous service.

CEEG is a professional transformer manufacturer! Our production base covers an area of more than 600 acres (40 hectares) with extensive facilities and a total construction area of 180,000 square meters. We have a professional team of more than 1,000 employees. We have advanced transformer production and testing equipment here to ensure that we provide customers with high-quality power transformer products.

We boast an array of cutting-edge equipment representing a high standard within the industry, including a complete set of shearing machines, fully automated winding machines, robot-operated stacking machines, the Hedrch Vacuum Casting Equipment, vacuum impregnation systems, air cushion transport vehicles, a fully enclosed production workshop with a cleanliness level of 100,000, 20-ton vertical winding machines, 10-ton horizontal winding machines, coal-oil gas phase drying equipment, and a 200-ton overhead crane. We adopt the latest technology and processes to ensure our products comply with international standards and customer needs.

We have a strong production capacity of 30 million kVA power transformers annually. This means we can cater to all sizes and types of power transformer needs, from small applications to large energy projects. No matter what specifications our customers require, we deliver them on time and support them with high quality and reliability.