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
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…
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
“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.
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
HPS distribution transformers for indoor & outdoor applications
HPS offers distribution transformers in both dry-type and oil filled technology utilising the best insulating materials.
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
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
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
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
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
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
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
PAMAS Offer Automatic Liquid Particle Counters
Particles in the transformer oil adversely affect the dielectric strength of the insulating oil. Depending on type, size and quantity of particles (metallic, water etc.), a flash-over could be generated, which can be hazardous…
Selection & Application Of Surge Arrester
Electrical equipment like transformer, generator, CTs, PTs and motor requires to be protected from over voltages. Surge arrester is used to protect these equipments from lightning and switching over voltages. Modern day’s surge arrester uses Metal oxide varistor as an active element and provides exceptional overvoltage protection to the equipment connected to the power system... - Abhijit Dhamale, P Kirushnaraj
CTs In Electrical Diagnostics
The versatility and performance of Current Transformers (CTs) mean that many of the instruments used for testing and diagnostics of electrical insulation and earthing can be made smaller, lighter, safer, more reliable and less expensive... - Dr Stan Zurek
Significance Of Transformer Oil Monitoring
It is of vital importance to monitor the condition of transformer oil. Periodic testing of transformer oil is necessary to ensure safe, economical, trouble free and undisturbed power supply... - V. G. Patel, Jay B. Thakar
Keeping An Eye On Transformer Health
On-line dielectric condition monitoring of bushing and transformer insulation is essential for managing transformer health. MONTRANO continuously monitors the condition of insulation in bushings and transformers...
