Topics: Relay, Solid state relay, Electric motor Pages: 22 (6910 words) Published: April 26, 2013
Study and parameterization of numerical motor protection relay for HT motor

A Project Report submitted for requirements of Vocational Trainee Program 2012 Tata Steel Ltd.

Project Guide: Mr. Ankur Gandotra Manager( IEM),Coke plant-2 Iron Making Electrical Maintenance Tata Steel Ltd, Jamshedpur

Prepared by:Electronics and Communication Engineer Vocational Trainee 2012 Tata Steel Ltd, Jamshedpur

I hereby declare that the work presented in this project entitled “Study and parameterization of numerical motor protection relay for HT motor.” submitted towards completion of project during my on-job training under the Vocational Trainee program’12 is an authentic record of my original work carried out under the guidance of Mr. Ankur Gandotra, Manager IEM, Iron Making Electrical Maintenance, Tata Steel Ltd, Jamshedpur. I have not submitted the matter embodied in this report for any other project.

Electronics and communication Engineer Vocational Trainee (Technical)-12 Tata Steel Ltd, Jamshedpur Date: 25-06-2012

The foregoing project report entitled “Study and parameterization of numerical motor protection relay for HT motor ” submitted by Mr. Sunita Lamay (VT-12) is hereby approved as an authentic study of his project work during his training at coke plant-2, Tata Steel. It is presented in a satisfactory manner to warrant its acceptance as a prerequisite in the completion of his training.

Project Guide: Mr. Ankur Gandotra Manager IEM (coke plant) Iron Making Electrical Maintenance Tata Steel, Works, Jamshedpur


Acknowledgement The project work on numerical motor protection relay unit in Coke plant, Tata Steel has been a great learning experience for me. It provided me an opportunity to apply my theoretical skill sets in a real world problem. Being a novice in the area of steel making the project could not have been successful without the encouragement and backing provided to me by various people at different stages of the project. First of all I would like to thank Mr. N.K.Bhalla (Iron making electrical maintenance) for his inspiration and support which energized me to start working on the project with utmost enthusiasm and had been the driving force to successfully accomplish the assigned task. The project could not have been completed without the auspices and guidance provided to me by my guide, Mr. Ankur Gandotra (Manager, IEM, Coke plant-2). I would extend my heartiest thanks to him for providing me an opportunity to work on the problem and for his cognizant instructions which helped me smoothly sailing through the project. He is the person whom I always turned up to, whenever in doubt, and he made sure to bring me out of the adverse situation.

Finally, I would like to thank all the staff of Coke plant II who provided me the necessary support throughout my project.

Sunita lamay Kanchan kumari Tarun Electronics and communication Engineer Vocational Trainee (Technical)-12 Tata Steel, Works, Jamshedpur


Table of contents Chapter 1: Executive Summary 1.1 Introduction 1.2 Key Project Deliverables 1.3 Outline of Project Report 1.4 Conclusion Chapter 2: Motor Protection 2.1 Definitions of motor protection 2.2 Types of motor protection 2.3 Motor protection table Chapter 3: Relay 3.1 Basic definition 3.2 Relay construction and working 3.3 classification of relay 3.4 Numeric relay 5 5 5 6 6 7 7 8 14 15 15 16 16 18

Chapter 4: Parameterization of relay RHO3 4.1 Area and type of motor 4.2 Thermal protection menu 4.3 Over/under current protection menu 4.4 Phase unbalanced protection menu 4.5 Number of start protection menu 4.6 Temperature protection menu 4.7 Parameter table Chapter 5: Recommendations Chapter 6: Conclusion References

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Chapter 1 Executive Summary 1.1 Introduction Coke plant II has Battery 8 and 9. In the plant process, LV and HV induction motors are used in large numbers. This project aims at providing...
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