Electrical circuit breaker maintenance

CIRCUIT BREAKER MAINTENANCE, LOW-VOLTAGE (CBMLV | #134)
4.5 DAYS | 3.2 CEUs

Participants in this class will visually and electrically inspect circuit breakers according to the manufacturer and NETA MTS requirements. This hands-on course is intended for new or experienced electricians and technicians that install, maintain, repair or troubleshoot power circuit breakers, rated less than 1,000 VAC, equipped with electromechanical or solid-state tripping devices. Based on the results of the tests, technicians should be able to make pass/fail decisions on circuit breakers. In addition to improving electrical system reliability, by ensuring optimum fault clearing times, well-maintained circuit breakers minimize the arc flash hazard energy levels that technicians can be exposed to during a fault.

*FOR ONSITE SESSIONS ONLY: NOTE THAT THE CUSTOMER MUST SUPPLY THE ITEMS MARKED WITH AN ASTERISK ON THE EQUIPMENT LIST. AVO WILL NOT BE SHIPPING THEM.

To receive 3.2 CEUs, participants must attend 4.5 days of class (32 contact hours) and attain a minimum average grade of 80% (overall grade will consist of 50% lab practice and 50% final exam). Upon completion of this course and lab practice, the participants will demonstrate that they are able to:

• Describe the different type of circuit breakers, their components, and functions.
• Perform circuit breaker and cabinet service maintenance service safely.
• Interpret and utilize time characteristic curves.
• Demonstrate all standard tests performed on a circuit breaker.

CIRCUIT BREAKER MAINTENANCE, MEDIUM-VOLTAGE (CBMMV | #300)
3.5 DAYS | 2.5 CEUs

This course provides training for the performance of visual, mechanical and electrical inspections, in accordance with manufacturers’ and NETA MTS requirements. Technicians have more components to test and maintain to ensure a 3 to 5 cycle operating time. This hands-on course is intended for new or experienced electricians and technicians that install, maintain, repair or troubleshoot air and vacuum metal-clad circuit breakers and switchgear, rated at 1 kV and higher.

Failure of one of these circuit breakers can cause catastrophic damage to other equipment and can be extremely hazardous to nearby personnel. In addition to improving electrical system reliability, well maintained circuit breakers also minimize the arc flash hazard energy levels that technicians can be exposed to during a fault.

To receive 2.5 CEUs, the participant must attend 3.5 days of class (25 contact hours) and attain a minimum average grade of 80% (overall grade will consist of 50% lab practice and 50% final exam). Upon completion of this course, the participant will demonstrate that he/she is able to:

• Identify components and insulation mediums for all circuit breakers (vacuum, air magnetic, oil and SF 6 ).
• Utilize appropriate personal protective equipment and safe work procedures including lockout/tagout.
• Evaluate breaker ratings for various applications.
• Interpret control schematics.
• Outline removal and restoration procedures.
• Adjust linkages, switches and contacts.
• Practice circuit breaker maintenance service per manufacturers and NETA MTS specification.
• Perform and evaluate the results of all required tests during labs.

CIRCUIT BREAKER MAINTENANCE, MOLDED & INSULATED CASE (CBMMIC | #418)
2 DAYS | 1.4 CEUs

Molded and insulated case circuit breakers are designed to be disassembled, inspected, adjusted and cleaned and require testing and maintenance to ensure system reliability. This hands-on course is intended for new or experienced electricians and technicians that install, maintain, repair or troubleshoot molded or insulated case circuit breakers, rated less than 1 kV, equipped with thermal, magnetic or solid state tripping devices.

Participants in this course will be required to perform visual and electrical inspections on the circuit breakers and their auxiliary devices. The electrical inspections provide data regarding the condition of the insulation, contacts and operating mechanisms.

To receive 1.4 CEUs, the participant must attend 2 days of class (14 contact hours) and attain a minimum average grade of 80% (overall grade will consist of 50% lab practice and 50% final exam). Upon completion of this course, the participant will demonstrate that he/she is able to:

• Identify circuit breaker components.
• Utilize appropriate personal protective equipment and safe work procedures for breaker maintenance.
• Interpret NEMA breaker maintenance procedures.
• Carry out complete circuit breaker maintenance, removal and restoration procedures.
• Perform and evaluate the results of low resistance, insulation resistance and overcurrent tests.
• Verify operation of the trip device and accessories