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Title: microprocessor-based relays of ac motors
Page Link: microprocessor-based relays of ac motors -
Posted By: seminar paper
Created at: Thursday 08th of March 2012 04:30:30 PM
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microprocessor-based relays of ac motors



INTRODUCTION

Microprocessor-based distribution relays contribute to improved reliability and reduced costs on electric power systems. Microprocessor-based relays, also called digital relays, have a proven track record of reliability, with over 100,000 relay-years of field experience. Microprocessor based relays provide technical improvements and cost savings in several ways:

• The relays use programmable logic ....etc

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Title: transformer protection using numerical relays-duobias M relay
Page Link: transformer protection using numerical relays-duobias M relay -
Posted By: manjushaabburi
Created at: Friday 16th of July 2010 01:16:37 AM
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Title: Testing Numerical Transformer Differential Relays
Page Link: Testing Numerical Transformer Differential Relays -
Posted By: computer girl
Created at: Monday 11th of June 2012 05:43:32 PM
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Testing Numerical Transformer Differential Relays



INTRODUCTION

Commissioning versus Maintenance Testing
Types of Transformer Differential Protection:
Restrained Phase Differential
High Set Phase Differential
Ground Differential

Commissioning

Common Practice:
Test all numerical relay settings –
verify settings properly entered
Easily facilitated using computer –
automate test set & store results
Hundreds of tests are possible –
numerical relays have many s ....etc

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Title: Microprocessor based protective relays
Page Link: Microprocessor based protective relays -
Posted By: Rekha rani
Created at: Monday 21st of February 2011 12:04:08 PM
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Title: A New Strategy for Determining Fault Zones in Distance Relays
Page Link: A New Strategy for Determining Fault Zones in Distance Relays -
Posted By: seminarsense
Created at: Friday 03rd of December 2010 08:39:14 PM
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This article describes a novel method for identifying the correct fault zone in distance relays . The major difference of this from the conventional strategies is that it does not depend on fixed boundaries for backup zones. Here, information is exchanged between local relays and also a a command from the remote end relay.

EXSITING DISTANCE SETTING STRATEGIES

A distance relay usually contains three staggered distance zones which is divided into zone-1(an underreaching fast tripping, nondelayed zone), zone-2(set to cover the prot ....etc

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Title: Electromechanical Relays
Page Link: Electromechanical Relays -
Posted By: seminar paper
Created at: Monday 05th of March 2012 04:13:35 PM
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Electromechanical Relays



Why Electromechanical Relays?

Separation of AC and DC circuits

Interface between electronic control circuits and power circuits


The Principle Behind Electromechanical Relays


A relay is similar to a switch, it is either open or closed. When the switch is open no current passes through the relay, the circuit is open, and the load that is connected to the relay receives no power. When a relay is closed, the ....etc

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Title: 133 RADIO FREQUENCY REMOTE CONTROL BOARD CONTROL EIGHT RELAYS
Page Link: 133 RADIO FREQUENCY REMOTE CONTROL BOARD CONTROL EIGHT RELAYS -
Posted By: rathod.shrikant17
Created at: Friday 06th of August 2010 03:46:42 PM
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Title: distance relays operation by fuzzy logic
Page Link: distance relays operation by fuzzy logic -
Posted By: gopinadh
Created at: Friday 02nd of July 2010 06:23:01 PM
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Title: MODELING RELAYS FOR POWER SYSTEM PROTECTION STUDIES
Page Link: MODELING RELAYS FOR POWER SYSTEM PROTECTION STUDIES -
Posted By: project report helper
Created at: Thursday 28th of October 2010 02:10:08 PM
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MODELING RELAYS FOR POWER SYSTEM
PROTECTION STUDIES


by
SANDRO GIANNY AQUILES PEREZ



ABSTRACT
Numerical relays are the result of the application of microprocessor technology in relay
industry. Numerical relays have the ability to communicate with its peers, are
economical and are easy to operate, adjust and repair. Modeling of digital and
numerical relays is important to adjust and settle protection equipment in electrical
facilities and to train protection personnel. Designing of numeri ....etc

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Title: ppt for technical seminars on microcontroller based different types of relays
Page Link: ppt for technical seminars on microcontroller based different types of relays -
Posted By: Abhikoppa
Created at: Thursday 15th of March 2012 05:14:57 PM
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