Thermal Performance Of Distribution Transformers
This article illustrates the thermal behaviour of transformer with respect to the temperature rise test – and also discusses various factors that influence the test results. The article is also focusing on the causes for transformer failure and with certain remedies to overcome them... - S. Arjuna Rao, G. Girija, Manikandan N, Swaraj Kumar Das
Reduction Of Losses
Technical losses in Distribution Transformers (DTs) occur because of the physical nature of the equipment and infrastructure of the power systems, i.e., I2R or copper loss – in the conductor cables, transformers, switches etc., High Technical Losses (No Load & Load losses) persist in DTs of all major utilities across India – and their losses are very high when compared to the Ideal losses for the same capacity...
Looking At The Transformer Kraft Paper
In the construction of a transformer, the most vulnerable is the paper insulation. The paper insulation begins to degrade from the day of installation. In this article, the importance of kraft paper and its process of manufacturing such as preparation, wet washing, pulping, screening, cleaning, refining, blending etc., have been presented… - Vishavdeep Jindal, Jashandeep Singh
Moving forward with tan-delta high voltage insulation testing
Though recent tan-delta test sets in the market, which are widely used to assess insulation in high-voltage electrical apparatus, combine versatility with convenience, there is room for further improvement. - Vince Oppedisano
Aging Assessment Of Power Transformer Insulating Oil
The most expensive and important equipment in electric power system, power transformer plays a vital role in maintaining reliable and efficient electricity supply. The condition evaluation of insulating oil of power transformer is performed by oil contamination test and the Dissolved Gas Analysis (DGA) method... - Dr. Naveen Kumar Sharma, Dr. Yog Raj Sood, Dr. Rajnish Shrivastava
Advance Energy Efficient Transformers Testing
To prove that the transformer meets customer’s specifications and design expectations, the transformer has to go through different testing procedures in manufacturer premises... - D A Suthar
Aspects Of Loss Reduction
Though Distribution Transformer (DT) technical loss reduction can also be achieved through replacement of the DTs altogether, the cost of new DTs do not justify the savings from loss reduction...
“We would urge our potential customers to work closely with us to support and...
Born out of the research division of GEC Alsthom, M&I Materials Limited combines the proven pedigree of long-standing products with the R&D expertise to bring new solutions to market. The company is dedicated to manufacturing specialist materials for industry and science, and is the driving force behind a portfolio of its successful brands ă including APIEZON, METROSIL, MIDEL and WOLFMET. In an exclusive interview with Electrical India, Barry Menzies, Commercial Director-MIDEL transformers fluids, is giving an account of their company’s business to P K Chatterjee. Excerpts…
“Distribution sector is the primary target where competition is more and volumes are large…”
PETE Hammond Power Solutions Pvt Ltd was started by K Linga Reddy (Chairman) with more than four decades of experience in Transformer Industry covering all aspects of Designing, Development, Manufacturing, Testing, Commissioning and Servicing and Managing Director K Ravi Krishna Reddy with more than two decades of experience in the same Industry. In an exclusive interview with Electrical India, Chairman Reddy is describing his company’s capability and business potential to P K Chatterjee. Excerpts...
REWIRING INDIAN ELECTRICITY
Strategic mapping of Indian electrical equipment industry - Subhajit Roy, Group Editor
Transformer Trends
Highlighting the key technological developments in Power Transformers and Distribution Transformers. - Dr G D Kamalapur
On A Threshold Of Transformation – India’s Transformer Industry
The Transformer market in India can be pegged at more than INR 12,000 Crores. Power Transformers contribute 45 percent of the total market and distribution transformers, 55 percent. Over the last two years, the market has grown at a very moderate rate at less than 4 percent...- Amol Kotwal
Smart Transformer For Distribution System
Smart transformers work independently to constantly regulate voltage and maintain contact with the smart grid in order to allow remote administration (if needed), and to provide information and feedback about the power supply and the transformer... - Narendiran S, Dr. Sarat Kumar Sahoo
High Efficiency Distribution Transformers
Due to use of better grade materials and optimum design, sudden failures are reduced along with lower cost of maintenance, leading to increased life expectancy. These benefits add up and balance against the inevitable increase in purchase cost – as additional copper in the windings and better materials in the core will be used in the manufacture of high efficiency transformers... - S V Varadarajan
Case Studies Of The Transformers Failure Analyses
Collection of failure data is the first major task. In free repair service or in repair contract, very little effort is made by utilities to find out the root cause of failure, which could be one of the reasons why a damaged transformer is replaced by a new one without removing the cause of damage, leading to failure immediately or within a very short period... - Manish N Sinha, Palak Patel, Parth Shah, Maulik Doshi, Nishith Bhalodiya
Trends In The Standards For Dry Type Transformers
With the increasing use of Dry type transformers, it is important for the utilities and the regulators to have norms for losses for Dry type transformers – as we have norms for oil immersed transformers in form of star labelling programme... - Sailesh Purohit, Thomas Lim, Radoslaw Szewczyk
Discrete Wavelet Transform Based Differential Protection for Power Transformers
Transformers are a critical and expensive equipment in the power system network. They function as a node to connect two different voltage levels. Hence, the availability of their service is vital in maintaining the continuous power supply to consumers. Since many decades, differential protection provides the best overall protection for a power transformer to protect against faults... - Narri Yadaiah, Nagireddy Ravi
Preparing Vessels For Dielectric Fluid Testing
When unexpected results are obtained while testing the dielectric breakdown voltage of transformer dielectric fluids, the cause can often be traced to inadequate preparation...
“Esennar contributes to infrastructural advancement”
Sridhar Reddy Arumalla, Managing Director, Esennar Transformers sheds light on Indian power and distribution transformers in an e-mail interaction with Electrical India.
AccuLoss Loss Measurement System
AccuLoss is a complete three-phase transformer measuring system designed for power frequency testing and calibration of medium and large power transformers, large motors and turbines.
