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The Relay Testing Handbook is a comprehensive series of relay testing books written for relay testers by a relay tester. You get the tools necessary to test any relay: and you can take them everywhere. Get the theory behind the element, what the relay is looking for, step-by-step testing instructions, and how to evaluate your results in BACK TO THE BASICS CURRENT TESTING 2014 Valence Electrical Training Services LLC. All rights reserved. Page 3 of 28 Valence Electrical Training Services HOW TO UNDERSTAND AND DETERMINE PHASE ROTATION IN A POWER A counter-clockwise generator can be defined as a rotor that rotates counter-clockwise inside a stator as shown in the following video. Some people would refer to the voltages created by this generator to be “counter-clockwise” because if you start with A: UNDERSTANDING PERMISSIVE UNDER-REACHING TRANSFER TRIP Here’s a transcript: Welcome to the fourth video in our end-to-end testing series. We’ll be looking at a Permissive Under-reaching Transfer Trip, or PUTT, communication-assisted trip scheme in thisvideo.
HIGH IMPEDANCE BUSBAR DIFFERENTIAL PROTECTION • VALENCE The high impedance differential busbar protection has an impedance of 2000Ω. That means that the current will want to flow around the outside of the equivalent circuit because the outside circuit has a lower impedance path during external faults. When 52-2 CT fully saturates, its magnetic field impedance is effectively 0.00Ω. INTRODUCTION TO BREAKER FAILURE SCHEMES (50BF) • VALENCE I presented a “Testing Breaker Failure Schemes” paper at the 36th annual Hands-On Relay School in 2019.Here’s the first part of the paper that will give you a basic introduction to Breaker Failure Schemes: 1. Introduction. The power system is a delicate balance between load and generation. WELCOME TO THE VALENCE ELECTRICAL TRAINING ACADEMY Valence Electrical Training Services (RelayTraining.com) offers several training options for relay testers who want to become true relay testing craftsmen/women. Registered students can access their courses 24/7/365 here. Individual students can: Work through the courses and seminars they are enrolled in. View their progress. View and download their certificates. View and edit their profile THE RELAY TESTING HANDBOOK: PRINCIPLES AND PRACTICE Principles and Practice xi Chapter 11: Directional Overcurrent (67) Element Testing 231 1. Application 231 2. Operation 235 3. Settings 236 4. Pickup Testing 238 TESTING POTENTIAL TRANSFORMERS 2014 Valence Electrical Training Services LLC. All rights reserved. Page 3 of 11 Valence Electrical Training Services INTRODUCTION TO POWER SYSTEM PROTECTION (FREE) • VALENCE Introduction to Power System Protection (Free) 3 Lessons. When I start to research a new topic about high voltage electricity and relay testing, I start by re-watching the videos in this series. The videos are dated, but the main principles of electricity are never going to RELAY TESTING TRAINING FOR RELAY TESTERS BY RELAY TESTERSONLINE TRAININGTESTING HANDBOOKSHANDS-ON TRAININGELECTRICAL RESOURCESABOUTVALENCE
The Relay Testing Handbook is a comprehensive series of relay testing books written for relay testers by a relay tester. You get the tools necessary to test any relay: and you can take them everywhere. Get the theory behind the element, what the relay is looking for, step-by-step testing instructions, and how to evaluate your results in BACK TO THE BASICS CURRENT TESTING 2014 Valence Electrical Training Services LLC. All rights reserved. Page 3 of 28 Valence Electrical Training Services HOW TO UNDERSTAND AND DETERMINE PHASE ROTATION IN A POWER A counter-clockwise generator can be defined as a rotor that rotates counter-clockwise inside a stator as shown in the following video. Some people would refer to the voltages created by this generator to be “counter-clockwise” because if you start with A: UNDERSTANDING PERMISSIVE UNDER-REACHING TRANSFER TRIP Here’s a transcript: Welcome to the fourth video in our end-to-end testing series. We’ll be looking at a Permissive Under-reaching Transfer Trip, or PUTT, communication-assisted trip scheme in thisvideo.
HIGH IMPEDANCE BUSBAR DIFFERENTIAL PROTECTION • VALENCE The high impedance differential busbar protection has an impedance of 2000Ω. That means that the current will want to flow around the outside of the equivalent circuit because the outside circuit has a lower impedance path during external faults. When 52-2 CT fully saturates, its magnetic field impedance is effectively 0.00Ω. INTRODUCTION TO BREAKER FAILURE SCHEMES (50BF) • VALENCE I presented a “Testing Breaker Failure Schemes” paper at the 36th annual Hands-On Relay School in 2019.Here’s the first part of the paper that will give you a basic introduction to Breaker Failure Schemes: 1. Introduction. The power system is a delicate balance between load and generation. WELCOME TO THE VALENCE ELECTRICAL TRAINING ACADEMY Valence Electrical Training Services (RelayTraining.com) offers several training options for relay testers who want to become true relay testing craftsmen/women. Registered students can access their courses 24/7/365 here. Individual students can: Work through the courses and seminars they are enrolled in. View their progress. View and download their certificates. View and edit their profile THE RELAY TESTING HANDBOOK: PRINCIPLES AND PRACTICE Principles and Practice xi Chapter 11: Directional Overcurrent (67) Element Testing 231 1. Application 231 2. Operation 235 3. Settings 236 4. Pickup Testing 238 TESTING POTENTIAL TRANSFORMERS 2014 Valence Electrical Training Services LLC. All rights reserved. Page 3 of 11 Valence Electrical Training Services INTRODUCTION TO POWER SYSTEM PROTECTION (FREE) • VALENCE Introduction to Power System Protection (Free) 3 Lessons. When I start to research a new topic about high voltage electricity and relay testing, I start by re-watching the videos in this series. The videos are dated, but the main principles of electricity are never going to ONLINE RELAY TRAINING VIDEOS Understanding Permissive Under-Reaching Transfer Trip (PUTT) Communication Assisted Trip Schemes Video. Here is the latest video describing the Permissive Under-Reaching Transfer Trip Communication-Assisted Trip Schemes used in modern distanceprotection.
ARTICLES WITH RELAY TESTING TECHNIQUES How To Communicate with a Test-Set or Relay. Sometimes the hardest part of relay testing is getting your laptop to talk to the relay or test-set. There are two primary communication methods: Serial Connections Serial communication is the most. When I test induction disc relay type . Is the pickup value the value at which the discstarts
INTRODUCTION TO BREAKER FAILURE SCHEMES (50BF) • VALENCE I presented a “Testing Breaker Failure Schemes” paper at the 36th annual Hands-On Relay School in 2019.Here’s the first part of the paper that will give you a basic introduction to Breaker Failure Schemes: 1. Introduction. The power system is a delicate balance between load and generation. HOW TO TEST PROTECTIVE RELAYS CORRECTLY • VALENCE Download the program from the machine, analyze the program, and create simple commands that will simulate the keypad presses required to get hopper #1 to operate. Repeat for hopper #2 and hopper #3. Run the three tests and make sure the correct hopper operates for eachsimulation.
TESTING DIRECTIONAL OVERCURRENT RELAYS FROM VALENCE In the previous post about Directional Overcurrent relay (67) testing (Finding the Direction in Directional Overcurrent Relays), we reviewed Directional Overcurrent protection from a system perspective to enhance the descriptions in The Relay Testing Handbook: Principles and Practice.We’ll be looking at Directional Overcurrent relays from a testing perspective in this post. A NEW TRANSMISSION LINE PROTECTION (21) VIDEO • VALENCECLICK TO VIEW The transmission line you want to protect is 10 miles long, so the entire impedance of this line is 10 Ohms. If we applied a dead short at the end of this line, the relay would measure the voltage and current flowing through the relay, apply Ohms Law, and calculate 10 Ohms. If there was a fault 50% down the THE DIFFERENCE BETWEEN RELAYS AND CIRCUIT BREAKERS Control relays tell the circuit breaker to open and close under normal conditions. A protective relay protects the electrical system by trying to determine what is normal and abnormal and tells the circuit breaker to open when a problem is detected. Protective relays and TESTING LOSS-OF-FIELD / LOSS-OF-EXCITATION ELEMENTS (40 Chapter 15: Testing Loss-of-Field / Loss-of-Excitation Elements (40) Excerpt. Generators normally export the VARs necessary for transformers, motors, and other inductive machines to operate. The excitation system controls how much voltage the generator will produce internally, which is the same as the Generator Terminal Voltage whenthe
PRINCIPLES AND PRACTICE Principles and Practice 40 4. Fault Types The electrical system can be affected by many problems, but protective relays are primarily designed to protect the electrical INTRODUCTION TO POWER SYSTEM PROTECTION (FREE) • VALENCE Introduction to Power System Protection (Free) 3 Lessons. When I start to research a new topic about high voltage electricity and relay testing, I start by re-watching the videos in this series. The videos are dated, but the main principles of electricity are never going to RELAY TESTING TRAINING FOR RELAY TESTERS BY RELAY TESTERSONLINE TRAININGTESTING HANDBOOKSHANDS-ON TRAININGELECTRICAL RESOURCESABOUTVALENCE
The Relay Testing Handbook is a comprehensive series of relay testing books written for relay testers by a relay tester. You get the tools necessary to test any relay: and you can take them everywhere. Get the theory behind the element, what the relay is looking for, step-by-step testing instructions, and how to evaluate your results in ARTICLES WITH RELAY TESTING TECHNIQUES How To Communicate with a Test-Set or Relay. Sometimes the hardest part of relay testing is getting your laptop to talk to the relay or test-set. There are two primary communication methods: Serial Connections Serial communication is the most. When I test induction disc relay type . Is the pickup value the value at which the discstarts
UNDERSTANDING PERMISSIVE UNDER-REACHING TRANSFER TRIP Here’s a transcript: Welcome to the fourth video in our end-to-end testing series. We’ll be looking at a Permissive Under-reaching Transfer Trip, or PUTT, communication-assisted trip scheme in thisvideo.
BACK TO THE BASICS CURRENT TESTING 2014 Valence Electrical Training Services LLC. All rights reserved. Page 3 of 28 Valence Electrical Training Services HOW TO UNDERSTAND AND DETERMINE PHASE ROTATION IN A POWER A counter-clockwise generator can be defined as a rotor that rotates counter-clockwise inside a stator as shown in the following video. Some people would refer to the voltages created by this generator to be “counter-clockwise” because if you start with A: WHY DOES MY OPEN-DELTA CONNECTED PHASOR DIAGRAM LOOK WEIRD A Delta-connected relay doesn’t see the Wye voltages, so we’ll remove them in Figure 6-9, which is a good representation of what the test-set thinks is happening using Delta voltages and Wye currents. Figure 6-9: Delta Voltages and Line Current Phasor Diagram. The relay most likely uses whatever is connected to Va-Vn as its reference. WELCOME TO THE VALENCE ELECTRICAL TRAINING ACADEMY Valence Electrical Training Services (RelayTraining.com) offers several training options for relay testers who want to become true relay testing craftsmen/women. Registered students can access their courses 24/7/365 here. Individual students can: Work through the courses and seminars they are enrolled in. View their progress. View and download their certificates. View and edit their profile HIGH IMPEDANCE BUSBAR DIFFERENTIAL PROTECTION • VALENCE The high impedance differential busbar protection has an impedance of 2000Ω. That means that the current will want to flow around the outside of the equivalent circuit because the outside circuit has a lower impedance path during external faults. When 52-2 CT fully saturates, its magnetic field impedance is effectively 0.00Ω. TESTING POTENTIAL TRANSFORMERS 2014 Valence Electrical Training Services LLC. All rights reserved. Page 3 of 11 Valence Electrical Training Services WHAT IS DC OFFSET? ASK CHRIS • VALENCE ELECTRICAL TRAINING A fault is suddenly applied to the system and the sine wave suddenly becomes asymmetrical (the positive and negative peaks are NOT equidistant from zero), and then returns to normal (symmetrical) after a few cycles. The asymmetrical response to the fault is called DC Offset and it is a naturally occurring phenomenon of the electricalsystem.
RELAY TESTING TRAINING FOR RELAY TESTERS BY RELAY TESTERSONLINE TRAININGTESTING HANDBOOKSHANDS-ON TRAININGELECTRICAL RESOURCESABOUTVALENCE
The Relay Testing Handbook is a comprehensive series of relay testing books written for relay testers by a relay tester. You get the tools necessary to test any relay: and you can take them everywhere. Get the theory behind the element, what the relay is looking for, step-by-step testing instructions, and how to evaluate your results in ARTICLES WITH RELAY TESTING TECHNIQUES How To Communicate with a Test-Set or Relay. Sometimes the hardest part of relay testing is getting your laptop to talk to the relay or test-set. There are two primary communication methods: Serial Connections Serial communication is the most. When I test induction disc relay type . Is the pickup value the value at which the discstarts
UNDERSTANDING PERMISSIVE UNDER-REACHING TRANSFER TRIP Here’s a transcript: Welcome to the fourth video in our end-to-end testing series. We’ll be looking at a Permissive Under-reaching Transfer Trip, or PUTT, communication-assisted trip scheme in thisvideo.
BACK TO THE BASICS CURRENT TESTING 2014 Valence Electrical Training Services LLC. All rights reserved. Page 3 of 28 Valence Electrical Training Services HOW TO UNDERSTAND AND DETERMINE PHASE ROTATION IN A POWER A counter-clockwise generator can be defined as a rotor that rotates counter-clockwise inside a stator as shown in the following video. Some people would refer to the voltages created by this generator to be “counter-clockwise” because if you start with A: WHY DOES MY OPEN-DELTA CONNECTED PHASOR DIAGRAM LOOK WEIRD A Delta-connected relay doesn’t see the Wye voltages, so we’ll remove them in Figure 6-9, which is a good representation of what the test-set thinks is happening using Delta voltages and Wye currents. Figure 6-9: Delta Voltages and Line Current Phasor Diagram. The relay most likely uses whatever is connected to Va-Vn as its reference. WELCOME TO THE VALENCE ELECTRICAL TRAINING ACADEMY Valence Electrical Training Services (RelayTraining.com) offers several training options for relay testers who want to become true relay testing craftsmen/women. Registered students can access their courses 24/7/365 here. Individual students can: Work through the courses and seminars they are enrolled in. View their progress. View and download their certificates. View and edit their profile HIGH IMPEDANCE BUSBAR DIFFERENTIAL PROTECTION • VALENCE The high impedance differential busbar protection has an impedance of 2000Ω. That means that the current will want to flow around the outside of the equivalent circuit because the outside circuit has a lower impedance path during external faults. When 52-2 CT fully saturates, its magnetic field impedance is effectively 0.00Ω. TESTING POTENTIAL TRANSFORMERS 2014 Valence Electrical Training Services LLC. All rights reserved. Page 3 of 11 Valence Electrical Training Services WHAT IS DC OFFSET? ASK CHRIS • VALENCE ELECTRICAL TRAINING A fault is suddenly applied to the system and the sine wave suddenly becomes asymmetrical (the positive and negative peaks are NOT equidistant from zero), and then returns to normal (symmetrical) after a few cycles. The asymmetrical response to the fault is called DC Offset and it is a naturally occurring phenomenon of the electricalsystem.
ARTICLES WITH RELAY TESTING TECHNIQUES How To Communicate with a Test-Set or Relay. Sometimes the hardest part of relay testing is getting your laptop to talk to the relay or test-set. There are two primary communication methods: Serial Connections Serial communication is the most. When I test induction disc relay type . Is the pickup value the value at which the discstarts
INTRODUCTION TO BREAKER FAILURE SCHEMES (50BF) • VALENCE I presented a “Testing Breaker Failure Schemes” paper at the 36th annual Hands-On Relay School in 2019.Here’s the first part of the paper that will give you a basic introduction to Breaker Failure Schemes: 1. Introduction. The power system is a delicate balance between load and generation. HOW TO TEST PROTECTIVE RELAYS CORRECTLY • VALENCE Download the program from the machine, analyze the program, and create simple commands that will simulate the keypad presses required to get hopper #1 to operate. Repeat for hopper #2 and hopper #3. Run the three tests and make sure the correct hopper operates for eachsimulation.
AUTOMATIC CONTROL FOR ELECTRICAL SYSTEMS • VALENCE The final function of the control part of the substation equipment is to disconnect the machine from service. This operation is introduced by the action of a sequence of light-load control relays. Protective equipment is provided not only in the automatic substations, but also in the manually-operated or the semi-automatic stations. BACK TO THE BASICS CURRENT TESTING 2014 Valence Electrical Training Services LLC. All rights reserved. Page 3 of 28 Valence Electrical Training Services THE RELAY TESTING HANDBOOK: PRINCIPLES AND PRACTICE Principles and Practice xi Chapter 11: Directional Overcurrent (67) Element Testing 231 1. Application 231 2. Operation 235 3. Settings 236 4. Pickup Testing 238 TESTING LOSS-OF-FIELD / LOSS-OF-EXCITATION ELEMENTS (40 Chapter 15: Testing Loss-of-Field / Loss-of-Excitation Elements (40) Excerpt. Generators normally export the VARs necessary for transformers, motors, and other inductive machines to operate. The excitation system controls how much voltage the generator will produce internally, which is the same as the Generator Terminal Voltage whenthe
UNDERSTANDING THE GREAT LEADING VS. LAGGING POWER DEBATE The SEL and Beckwith relays use a combined angle system where the negative symbol indicates a lagging angle and the positive symbol indicates a leading angle. The GE/Multilin M60 (UR) relay uses a lagging angle system, but this system is unique because all of the angles have a negative symbol to let you know that they are lagging. GENERATOR RELAY PROTECTION DESCRIPTION OF OPERATION Valence Electrical Training Service s 9888 West Belleview Ave., PMB #122, Littleton CO 80123 store@relaytraining.com relaytraining.com303-250-8257
PRINCIPLES AND PRACTICE Principles and Practice 40 4. Fault Types The electrical system can be affected by many problems, but protective relays are primarily designed to protect the electrical RELAY TESTING TRAINING FOR RELAY TESTERS BY RELAY TESTERSONLINE TRAININGTESTING HANDBOOKSHANDS-ON TRAININGELECTRICAL RESOURCESABOUTVALENCE
The Relay Testing Handbook is a comprehensive series of relay testing books written for relay testers by a relay tester. You get the tools necessary to test any relay: and you can take them everywhere. Get the theory behind the element, what the relay is looking for, step-by-step testing instructions, and how to evaluate your results in ARTICLES WITH RELAY TESTING TECHNIQUES How To Communicate with a Test-Set or Relay. Sometimes the hardest part of relay testing is getting your laptop to talk to the relay or test-set. There are two primary communication methods: Serial Connections Serial communication is the most. When I test induction disc relay type . Is the pickup value the value at which the discstarts
UNDERSTANDING PERMISSIVE UNDER-REACHING TRANSFER TRIP Here’s a transcript: Welcome to the fourth video in our end-to-end testing series. We’ll be looking at a Permissive Under-reaching Transfer Trip, or PUTT, communication-assisted trip scheme in thisvideo.
BACK TO THE BASICS CURRENT TESTING 2014 Valence Electrical Training Services LLC. All rights reserved. Page 3 of 28 Valence Electrical Training Services HOW TO UNDERSTAND AND DETERMINE PHASE ROTATION IN A POWER A counter-clockwise generator can be defined as a rotor that rotates counter-clockwise inside a stator as shown in the following video. Some people would refer to the voltages created by this generator to be “counter-clockwise” because if you start with A: WHY DOES MY OPEN-DELTA CONNECTED PHASOR DIAGRAM LOOK WEIRD A Delta-connected relay doesn’t see the Wye voltages, so we’ll remove them in Figure 6-9, which is a good representation of what the test-set thinks is happening using Delta voltages and Wye currents. Figure 6-9: Delta Voltages and Line Current Phasor Diagram. The relay most likely uses whatever is connected to Va-Vn as its reference. WELCOME TO THE VALENCE ELECTRICAL TRAINING ACADEMY Valence Electrical Training Services (RelayTraining.com) offers several training options for relay testers who want to become true relay testing craftsmen/women. Registered students can access their courses 24/7/365 here. Individual students can: Work through the courses and seminars they are enrolled in. View their progress. View and download their certificates. View and edit their profile HIGH IMPEDANCE BUSBAR DIFFERENTIAL PROTECTION • VALENCE The high impedance differential busbar protection has an impedance of 2000Ω. That means that the current will want to flow around the outside of the equivalent circuit because the outside circuit has a lower impedance path during external faults. When 52-2 CT fully saturates, its magnetic field impedance is effectively 0.00Ω. TESTING POTENTIAL TRANSFORMERS 2014 Valence Electrical Training Services LLC. All rights reserved. Page 3 of 11 Valence Electrical Training Services WHAT IS DC OFFSET? ASK CHRIS • VALENCE ELECTRICAL TRAINING A fault is suddenly applied to the system and the sine wave suddenly becomes asymmetrical (the positive and negative peaks are NOT equidistant from zero), and then returns to normal (symmetrical) after a few cycles. The asymmetrical response to the fault is called DC Offset and it is a naturally occurring phenomenon of the electricalsystem.
RELAY TESTING TRAINING FOR RELAY TESTERS BY RELAY TESTERSONLINE TRAININGTESTING HANDBOOKSHANDS-ON TRAININGELECTRICAL RESOURCESABOUTVALENCE
The Relay Testing Handbook is a comprehensive series of relay testing books written for relay testers by a relay tester. You get the tools necessary to test any relay: and you can take them everywhere. Get the theory behind the element, what the relay is looking for, step-by-step testing instructions, and how to evaluate your results in ARTICLES WITH RELAY TESTING TECHNIQUES How To Communicate with a Test-Set or Relay. Sometimes the hardest part of relay testing is getting your laptop to talk to the relay or test-set. There are two primary communication methods: Serial Connections Serial communication is the most. When I test induction disc relay type . Is the pickup value the value at which the discstarts
UNDERSTANDING PERMISSIVE UNDER-REACHING TRANSFER TRIP Here’s a transcript: Welcome to the fourth video in our end-to-end testing series. We’ll be looking at a Permissive Under-reaching Transfer Trip, or PUTT, communication-assisted trip scheme in thisvideo.
BACK TO THE BASICS CURRENT TESTING 2014 Valence Electrical Training Services LLC. All rights reserved. Page 3 of 28 Valence Electrical Training Services HOW TO UNDERSTAND AND DETERMINE PHASE ROTATION IN A POWER A counter-clockwise generator can be defined as a rotor that rotates counter-clockwise inside a stator as shown in the following video. Some people would refer to the voltages created by this generator to be “counter-clockwise” because if you start with A: WHY DOES MY OPEN-DELTA CONNECTED PHASOR DIAGRAM LOOK WEIRD A Delta-connected relay doesn’t see the Wye voltages, so we’ll remove them in Figure 6-9, which is a good representation of what the test-set thinks is happening using Delta voltages and Wye currents. Figure 6-9: Delta Voltages and Line Current Phasor Diagram. The relay most likely uses whatever is connected to Va-Vn as its reference. WELCOME TO THE VALENCE ELECTRICAL TRAINING ACADEMY Valence Electrical Training Services (RelayTraining.com) offers several training options for relay testers who want to become true relay testing craftsmen/women. Registered students can access their courses 24/7/365 here. Individual students can: Work through the courses and seminars they are enrolled in. View their progress. View and download their certificates. View and edit their profile HIGH IMPEDANCE BUSBAR DIFFERENTIAL PROTECTION • VALENCE The high impedance differential busbar protection has an impedance of 2000Ω. That means that the current will want to flow around the outside of the equivalent circuit because the outside circuit has a lower impedance path during external faults. When 52-2 CT fully saturates, its magnetic field impedance is effectively 0.00Ω. TESTING POTENTIAL TRANSFORMERS 2014 Valence Electrical Training Services LLC. All rights reserved. Page 3 of 11 Valence Electrical Training Services WHAT IS DC OFFSET? ASK CHRIS • VALENCE ELECTRICAL TRAINING A fault is suddenly applied to the system and the sine wave suddenly becomes asymmetrical (the positive and negative peaks are NOT equidistant from zero), and then returns to normal (symmetrical) after a few cycles. The asymmetrical response to the fault is called DC Offset and it is a naturally occurring phenomenon of the electricalsystem.
ARTICLES WITH RELAY TESTING TECHNIQUES How To Communicate with a Test-Set or Relay. Sometimes the hardest part of relay testing is getting your laptop to talk to the relay or test-set. There are two primary communication methods: Serial Connections Serial communication is the most. When I test induction disc relay type . Is the pickup value the value at which the discstarts
INTRODUCTION TO BREAKER FAILURE SCHEMES (50BF) • VALENCE I presented a “Testing Breaker Failure Schemes” paper at the 36th annual Hands-On Relay School in 2019.Here’s the first part of the paper that will give you a basic introduction to Breaker Failure Schemes: 1. Introduction. The power system is a delicate balance between load and generation. HOW TO TEST PROTECTIVE RELAYS CORRECTLY • VALENCE Download the program from the machine, analyze the program, and create simple commands that will simulate the keypad presses required to get hopper #1 to operate. Repeat for hopper #2 and hopper #3. Run the three tests and make sure the correct hopper operates for eachsimulation.
AUTOMATIC CONTROL FOR ELECTRICAL SYSTEMS • VALENCE The final function of the control part of the substation equipment is to disconnect the machine from service. This operation is introduced by the action of a sequence of light-load control relays. Protective equipment is provided not only in the automatic substations, but also in the manually-operated or the semi-automatic stations. BACK TO THE BASICS CURRENT TESTING 2014 Valence Electrical Training Services LLC. All rights reserved. Page 3 of 28 Valence Electrical Training Services THE RELAY TESTING HANDBOOK: PRINCIPLES AND PRACTICE Principles and Practice xi Chapter 11: Directional Overcurrent (67) Element Testing 231 1. Application 231 2. Operation 235 3. Settings 236 4. Pickup Testing 238 TESTING LOSS-OF-FIELD / LOSS-OF-EXCITATION ELEMENTS (40 Chapter 15: Testing Loss-of-Field / Loss-of-Excitation Elements (40) Excerpt. Generators normally export the VARs necessary for transformers, motors, and other inductive machines to operate. The excitation system controls how much voltage the generator will produce internally, which is the same as the Generator Terminal Voltage whenthe
UNDERSTANDING THE GREAT LEADING VS. LAGGING POWER DEBATE The SEL and Beckwith relays use a combined angle system where the negative symbol indicates a lagging angle and the positive symbol indicates a leading angle. The GE/Multilin M60 (UR) relay uses a lagging angle system, but this system is unique because all of the angles have a negative symbol to let you know that they are lagging. GENERATOR RELAY PROTECTION DESCRIPTION OF OPERATION Valence Electrical Training Service s 9888 West Belleview Ave., PMB #122, Littleton CO 80123 store@relaytraining.com relaytraining.com303-250-8257
PRINCIPLES AND PRACTICE Principles and Practice 40 4. Fault Types The electrical system can be affected by many problems, but protective relays are primarily designed to protect the electrical5 Shares
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We don’t just teach you which buttons to press. You will have the theory to know what the relay is looking for, how to apply it with your test-set, and what you should be testing in your digital relays.EXPERT INSTRUCTION
We have experienced almost every possible relay problem over 20+ years of testing relays, so we'll help you avoid countless hours of headaches. We literally wrote the book on relay testing. UNIVERSAL APPLICATIONS We use REAL-WORLD SITUATIONS with a VARIETY of equipment to teach you the principles of power system faults that all relays respond to, so you can confidently test any relay with any test-set. CHRIS HAS A NATURAL TALENT FOR TEACHING! Chris has an incredible amount of knowledge and experience which he shares as he teaches the theory and practical methods of relay testing. These experiences are so valuable whether you are new or an experienced veteran of relay testing. You get theory and then the opportunity to set up different testing situations to apply and prove the lessons, you can experiment with the circuits and test-set until you are proficient. Regardless of the brand of tester, Chris is there to assist and offer advice until you are comfortable with the testing circuit and the test-set's available functions. This is an excellent opportunity to learn the strengths and weaknesses of different brands of relay test-sets. Chris has a natural talent for teaching! Rowan Dunbar Independant Consultant CHOOSE THE STYLE OF TRAINING THAT MEETS YOUR NEEDS ONLINE TRAINING THAT FITS YOUR SCHEDULE Don't have the time or budget for full days of hands-on training? Our online relay training seminars show you exactly how to test any digital relay with step-by-step instructions using a variety of relaysand test-sets.
Our online training courses dig deep into the basics that every relay tester should know using video presentations, real-world exercises, and quizzes to make sure you learn the applications. __ EXPLORE OUR ONLINE TRAINING SOLUTIONS REFERENCE MANUALS FOR THE FIELD Do you need answers during outages when you’re deep into testing and time is quickly ticking away? The Relay Testing Handbook is a comprehensive series of relay testing books written for relay testers by a relay tester. You get the tools necessary to test any relay: and you can take them everywhere. Get the theory behind the element, what the relay is looking for, step-by-step testing instructions, and how to evaluate your results in language that you can understand... when you need it most! __ VIEW THE HANDBOOKS AND GET YOUR ANSWERS HANDS-ON TRAINING WITH AN EXPERT Get effective, hands-on training from an industry expert who's experienced almost every problem you won't find in a book. Make sure you and your team perfectly understand all aspects of relay testing in one of our three-day, hands-on training classes. We’ll guide you through the theory without resorting to dry PowerPoint presentations, and then you’ll put it into practice with your test equipment on real relays with real settings. __ EXPLORE OUR HANDS-ON TRAINING SOLUTIONS Our Most Recent Posts: How to Test Breaker Failure Element Logic How to Test Breaker Failure Schemes Introduction to Breaker Failure Schemes (50BF) Our Most Popular Posts: Finding the Direction in Directional Overcurrent Relays What is DC Offset? Ask Chris What Relay Test Equipment Do You Use and Why?Search The Site:
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You can contact us using our online form or: Valence Electrical Training Services 9888 W. Belleview Ave, #122Littleton, CO 80123
Phone: 303.250.8257
E-Mail: info@relaytraining.comConnect With Us:
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