Current Transformers

In Current Transformers, you'll learn ...

• Current transformer measurement error
• Metering cores
• Protection cores
• Current transformer core selection
• Current transformer technical requirements
• Current transformers specific requirements for different relay protection applications

Overview

Preview a portion of this course before purchasing it.

Credit: 2 CPD

Length: 26 pages

Current transformers are specific transformer types used for current measurement. The common engineering laws are also valid for the current transformers. The most important roles of current transformers are:

• To transform currents, from a high value to a value that can be easily handled by protection relays and associated instruments
• To separate and insulate the metering circuit from the high voltage
• To provide options for standardization of instruments and protection relays with rated currents

This course is suitable for engineers with a desire to understand the fundamentals of current transformers. Presented details cover issues related to measurement error, protection and measurement cores, accuracy classes, core selection and necessary technical requirements that current transformers have to meet. Upon successful completion engineers will be able to address various current transformer terms, specific classes, application purposes and overall core selection process.

Learning Objectives

Upon completion of this course, participants will be able to:

• Calculate current-transformer measurement error for a stated operating condition.
• Distinguish metering cores by their intended measurement function.
• Explain the role of protection cores in relay applications.
• Select an appropriate current-transformer core for a stated application.
• Apply current-transformer technical requirements to a stated specification.
• Assess current-transformer requirements for different relay-protection applications.

Certificate of Completion

You will be able to immediately print a certificate of completion after passing a multiple-choice quiz consisting of 20 questions. CPD credits are not awarded until the course is completed and quiz is passed.