The Power Transformers of NGG are well known for their quality, reliability and dependability over the entire life cycle of its operation, even under tough environment conditions.
NGG’s manufacturing facilities are equipped with state-of-the-art machinery and test equipment to manufacture transformers of varied designs to suit customer requirements. Our transformers are in satisfactory operation for over two decades. NGG manufacturing range includes step-up and step-down power transformers up to 50 MVA with highest system voltage up to 66kV. NGG transformers are fully optimized to suit customer’s requirements of loss limitations, noise levels, dimensions, weights and provide customized engineering solutions for a wide range of applications. NGG transformers are known by their high performance, reliability and responsive after-sales services, and find application in Power Generation, Transmission, and Distribution, Rural Electrification, Industrial Installations, Railway Electrification and Mining segment
DESIGN, RESEARCH, AND ENGINEERING
Transformer Design and Engineering is the focal point for the customized transformer product offerings and NGG goes the extra mile in adopting best designs and engineering practices by embracing latest technologies and experienced engineers. NGG believes in incremental improvement in every product by virtue of strong focus on Research & Development. The designs are continuously optimized and validated through various routine, special and type tests. The usage of latest software applications, machinery and highly skilled & trained manpower helps in delivering reliable, efficient and long lasting products for our customers with diverse needs.
TRANSFORMER LAMINATION (CORE) MANUFACTURING FEATURES
NGG transformers are “core-type” characterized with Mitre Type Joints in thin highly Hi-B Grain oriental silicon steel laminations, which consequently results in a high performance lamination with low losses, low no load current and minimal noise levels. The laminations are assembled in step-lap construction, thereby further improving the above performance parameters. NGG’s core clamping method gives sturdy support and short-circuits strength to the windings by creating even pressure across the silicon steel sheets, keeping them firmly pressed against each other. This robust design helps to keep the core free from damage and distortion during transportation.
TRANSFORMER WINDING
NGG uses different types of winding to achieve.
- High Mechanical strength
- High Thermal strength
- Low Eddy losses
- High dielectric strength
Since, the life and efficiency of a transformer largely depends upon its windings, NGG lays special focus on its winding operations. The windings of the transformers are carried out in a dust free environment. In winding assembly area, rigorous quality &cleanliness standards are followed. NGG’s stringent quality process ensures high-quality components and tight manufacturing tolerances, which entail excellent control on all performance and operational parameters.
TESTING
All transformers are subject to routine tests and measurements in accordance with IEC/IS standards. Our test laboratories are fully equipped with latest testing equipment to conduct the routine tests as per IEC: 60076/ IS: 2026 standards. . In addition, type and special tests are conducted at NABL accredited laboratories such as CPRI, NTH and ERDA to validate our designs.