Current Transformers in Medium Voltage Systems

Medium Voltage (MV) Systems require the Current Transformers (CTs) to meet stringent dielectric performance for metering, monitoring and protection applications. To meet these requirements, proper CT selection and installation is vital for efficient and effective long-term operation. This white paper outlines the engineering considerations required by the MV system for installing the CT in insulated bus system and metal enclosed switchgear assemblies. It also presents the framework for IEEE standard requirements for dielectric safety, and the Accuenergy current transformers that can be used for safe integration.