Certified Energy Manager Practice Exam

Which standard provides requirements to control harmonic content of electrical power?

1. IEEE Standard 1017

2. IEEE Standard 519

3. IEEE Standard 1180

4. IEEE Standard 928

The correct answer is: IEEE Standard 519

The selected standard, IEEE Standard 519, is specifically designed to provide guidelines and requirements for the control of harmonic distortion in electrical power systems. Harmonics are voltage and current distortions that can occur when non-linear loads (such as variable frequency drives, computers, and fluorescent lighting) draw current in a non-sinusoidal manner. High levels of harmonic distortion can lead to various issues, such as overheating of equipment, reduction in system efficiency, and interference with communications systems. IEEE Standard 519 establishes specific limits for harmonic current and voltage distortion that should be adhered to in order to ensure the reliability and efficiency of electrical power systems. It outlines methods for measuring and calculating the harmonic levels, defines acceptable limits for various types of systems, and provides recommendations for mitigating harmonics through proper design and equipment selection. Other options listed do not specifically focus on harmonics in the same way. For example, IEEE Standard 1017 pertains to the testing of electric power systems and components, while IEEE Standard 1180 focuses on electric energy measurement. IEEE Standard 928 relates more to energy efficiency in electrical systems rather than harmonic control. Therefore, IEEE Standard 519 is the most relevant standard for addressing the harmonic content of electrical power.