Fundamentals of Basic Relay Testing - Denver

Duration: 2 days

Location: Denver, CO

Credits: 1.5 CEUs

Target audience

Maintenance technicians, electricians, engineers, or any others who are responsible for maintaining a safe and reliable electrical power distribution system in an industrial or commercial facility looking for entry level relay testing experience. Sales teams can benefit with the fundamentals taught in this class to better understand customer equipment.

Learning objective

At the completion of this course, students will be able to test phase / ground time over current (51) and phase / ground instantaneous over current (50) protection elements on electromechanical and microprocessor feeder protection relays.

Abstract

Time overcurrent and instantaneous overcurrent for phase and ground feeder protection are the most common protection elements found in any coordinated protection scheme. Relay technology has changed since the days of electromechanical relays, but the fundamentals of 50/51 have not, the testing approach for these elements are the same no matter what relay technology you’re using. Abnormal conditions and overcurrent protection elements are topics discussed for prevention of equipment damage and safety. Understanding the functions of Current Transformer (CT) and Voltage Transformer (VT) ratios, polarity, and operating principles as they apply to relaying are essential and will be covered as part of relay metering labs. Various manufacturers’ relays will be used for a realistic hands-on reinforcement of classroom-taught material, along with demonstrations for the best experience and education. Review of drawings depicting how 50/51 elements are used as well as for connection validation will also be covered.

Course topics include:

• Introduction to electromechanical and microprocessor relays
• Basic power / metering calculations
• As Found / Coordination / Testing parameters and when to use them
• CT / VT construction and connections as they appear in drawings for relaying schemes
• Relay test equipment and best practices when testing relays
• Fundamentals of phase and ground overcurrent / short circuit detection and how relays clear the condition

Relay Types and IEEE Functions Used in Class:

• ABB CO 50 / 51
• GE IAC 50 / 51
• Cutler Hammer DT3000 50P / 51P – 50G / 51G
• Eaton EDR5000 50P[1] / 51P[1] - 50R[1] / 51R[1]

Arriving at our Training Centers

Gaining Access:

Upon arriving at our training centers, follow signage and any other directions you may have received before arriving for your event. Our staff will greet you upon arrival and take you to the appropriate training area. You will be asked to sign in for all events so that we can track building occupants in case of an emergency situation.

What to Wear:

Due to the nature of our training facilities and other events taking place, we ask that you wear business casual (or appropriate PPE if your event requires PPE in lab exercises) while in the facilities. Please do NOT wear shorts, open-toed shoes or loose clothing that can get caught on equipment in the lab spaces.

Safety:

Our labs are working labs, as well as training and testing spaces. Equipment may or may not be energized with control voltages as well as three phase power. We ask that you do not open or operate any equipment within the facility without discussing with your host. Eaton staff will provide you with information on gathering points, as well as exit paths at the start of your event.

Customized Training Available

In addition, Eaton can customize training specific for your organization on a variety of other topics. To learn more visit www.eaton.com/electricalworkertraining or email EWT@eaton.com.

Continuing Education Units

Eaton’s courses offer professional continuing education training credits (CEUs) certified through the Community College of Allegheny County, Pittsburgh, PA.

Please verify your state’s reciprocity agreement for accepting continuing education units from a member state.

Cancellation Policy

Cancellations of In-Person offerings made prior to two weeks in advance of the first day of scheduled class will incur a 10% cancellation fee along with any incurred costs to date.

Cancellations of In-Person offerings made within two weeks of the first day of class will incur a 100% cancellation fee. If you cannot attend, contact us at EWT@eaton.com.