Orthomagnetic bushing current transformer for metering

BUSHING current transformers are ideal for many reasons. They are compact, convenient, economical, and, from the operator´s standpoint, they eliminate a separate piece of equipment. But they have one inherent limitation, namely, an accuracy generally not satisfactory for metering. Many efforts therefore have been made in the past to overcome this inherent limitation of the conventional design, with considerable success jn the laboratory but limited success in practice.