Presented By Ravi Gupta & Swapnil Marathe, Megger

This seminar will be on ground fault testing of low voltage circuit breakers and provides a comprehensive overview of essential testing protocols, requirements, and coordination strategies crucial for ensuring the integrity and safety of electrical systems. Attendees will gain valuable insights into the testing mandates outlined by the National Electrical Testing Association (NETA), including pickup, polarity, trip/no trip tests, and the low power supply test. Special emphasis will be placed on testing at reduced voltage levels when powered by a Potential Transformer (PT) to address concerns related to ground fault relay functionality. Moreover, the seminar will cover the specific requirements for ground fault protection, particularly in service entrances exceeding 1000 amps and in multilevel healthcare facilities, highlighting the significance of compliance with NFPA 70B as a mandatory requirement. Participants will gain an understanding of the importance of incorporating ground fault testing for fire protection in building maintenance protocols. An integral aspect of the seminar will be the discussion on coordination of ground faults to prevent widespread tripping of circuit breakers throughout a building. Attendees will learn strategies for ensuring adequate time delays to allow smaller breakers to trip before a ground fault at the service entrance triggers. These strategies will be illustrated through coordination curves. Overall, this seminar aims to equip participants with practical knowledge and strategies essential for conducting comprehensive ground fault testing of low voltage circuit breakers, ensuring the reliability, safety, and efficiency of electrical systems in diverse applications.