Losses in Distribution & Transmission Lines
It is fact that the unit of electric energy generated by power station does not match with the units distributed to the consumers. Some percentage of the units is lost in the distribution network. This difference in the generated & distributed units is known as transmission and distribution loss…
Common Errors While Designing an Electrical Protective Scheme
If the selection of inappropriate specifications switchgears go unnoticed, it may jeopardize safety of man and machines both. Therefore, utmost care is required, while designing an electrical protective scheme as far as selection of CTs of correct specifications, switchgears, etc is concerned.
Diagnostic Testing On Transformers
Performing a range of standard electrical tests on a regular basis has proven to be an effective way of gaining reliable insight into the operating condition of transformers. But, this has been a time- and cost-intensive job in the past. A true three phase test system can really make a difference.
Overvoltage Mitigation Techniques for PV Grid
In this case study, the authors have reviewed the conventional techniques used to mitigate the overvoltage problem and observe that they have several disadvantages. So, it is suggested a novel technique that relies on a minor modification made to the secondary windings of the distribution transformer: an extra tapping is pulled out from each of the secondary windings into a separate PV junction box which is the modified Point of Common Coupling (PCC)...
Main author - Vithal Narasinha Kamat
Co-authors – Nivea Chauhan, Harsh Bhatt, Payal Bhadresa, Akash Sent
Rishabh CTs – A Technological Excellence
Rishabh is having the complete basket of low tension current transformers manufactured in a world class CT manufacturing setup consisting of an automatic testing facility for all CTs with a printed Test Certificate...- Santosh R. Bhangale
Typical Phenomena in Transformers & Protections
An analysis of the current during an over excitation condition shows a predominant 5th harmonic component while analysis of inrush current shows a predominant 2nd Harmonic component. These characteristics help to differentiate an over excitation condition from inrush current condition. - Rajesh Chourishi
Dielectric Technology in Transformer
Utilities and transformer manufacturers focus on the design and manufacture of environmentally-friendly transformers that are nonhazardous while offering improved life cycle costs with minimal maintenance. These transformers offer reduced carbon footprint, reduced levels of pollution (water, soil, noise), enhanced lifecycle costs, enhanced product lifetime, and enhanced fire safety…
Design Reviews & Life Management Concepts
This paper explains importance of specifications, design reviews and life management concepts for reliable, uninterrupted and intended application of transformers throughout the life cycle. The specification forms the basis on which the manufacturer designs, manufactures and tests a transformer…- S. Kundu, P M Yadav, Ratnesh Talesara
“Smart Cities project will generate opportunities for Dry Type Distribution Transformers”
The area of concern is the falling tariffs within the renewable energy sector which is affecting the cost of transformers, states Manjit Singh Sethi, Local Business Unit Manager - Transformers, ABB India & Chairman, IEEMA Transformer Division in an interaction with Supriya Oundhakar…
Transform Potential of Your Transformer Reference Materials
To aid in the organization of a corporate or personal library, Megger is introducing a comprehensive series of Transformer Life Management bulletins that broadly cover the fundamentals of managing the life of a transformer.
An Overview of Superconducting Transformer Technology
Electrical energy is a major source of the entire process of evolution and modern lifestyle. This paper highlights the developments of the high temperature superconducting (HTSting) power transmission and distribution equipments such as transformer. Demand of energy, electricity generation and power transmission and distribution system require energy efficient equipments and machines... - Hambir Singh, Muvendra Kumar Singh
Curse of Dual Certification for Distribution Transformers
There is a conflict, the manufacturers are requesting Govt. of India to allow them the compliance of one of the authorities/ agencies directive i.e. BIS or BEE for the same goal of producing Energy Efficient DTs, and should not insist upon as in both the cases, they have to manufacture Energy Efficient Distribution Transformers as per only one standard IS:1180 Part 1/2014… - B Lal
As simple as a Smartphone – A paradigm shift to test technology
TRAX is not just another multi-functional test instrument, but rather many intelligent instruments built into one box. The software includes a number of apps, making it fast and easy to perform a large range of different tests. The hardware offers unmatched flexibility and the range of cables and accessories adding even more flexibility, making the TRAX an efficient and time saving system for any user in the world...
Management Of The Equipment
This article explains how 'condition monitoring' of transformers ultimately increases the life expectancy and renders trouble free service to the customer – and helps economic development of the country... - S Kundu
Easing Multi-function Testing
There is only one instrument to unpack, power up and configure; the same cable set is used for a whole range of measurements, so the connections only need to be made once; and, when carrying out a range of tests, users of multifunction instruments move quickly and easily from app to app, rather than having to go from instrument to instrument... - Peter Fagerström
Preventing Failure
Selection of the Circuit Breaker has to be done carefully, so that it does not allow the transformer to exceed the permissible winding temperature. The built-in Bi-metallic strips mounted in the Circuit Breaker, located below the top oil, achieve the temperature sensing function. The circuit breaker thus provides Thermal matching with the transformer & protects it against over loads... - C.V.Govinda Raju
Using Numerical Relay Micom P632
The major operating challenge to transformer differential protection is maintaining security during CT saturation for external faults while maintaining sensitivity to detect low magnitude internal faults. CT saturation reduces the secondary output from the CT, and cause a false differential current to appear to relay… - Shrotriya Keyal
Strengthening Power Distribution Systems
If we look at the huge costs of maintenance, repairs & replacements for oil type transformers spent every year, then the differential cost between oil type and dry type transformers should not be a too big amount, if it helps reduce transformer failures… - Aviral Gautama, Sailesh Purohit
Transform the potential of your Transformer Reference Materials
To aid in the organization of a corporate or personal library, Megger is introducing a comprehensive series of Transformer Life Management bulletins that broadly cover the fundamentals of managing the life of a transformer...
Significance of Polarity in Current Transformers
For certain kinds of measurements, even today, we need to know the correct polarity of the primary and secondary windings in current transformers... - K Sivakumar
