Distance Protection

The Distance Protection 3 hour PDH online course is a part of the Electrical category courses. Since the impedance of a transmission circuit is relative to its length, for distance measure it is suitable to use a relay able to measure the impedance of a circuit up to a present point (the reach point). Such a protection relay is known as a distance protection relay and is made to function only for faults happening between the protection relay location and the chosen reach point, therefore providing discrimination for short circuits that may happen in different line portions.

This course provides guidance on distance protection, a non-unit protection arrangement providing significant financial and technical benefits. Unlike phase and neutral overcurrent protection arrangements, the key benefit of distance protection is that its short circuit current coverage of the protected element is almost autonomous of source impedance changes.

This course is intended for use by electrical engineers, design and construction professionals, students and others interested in learning about distance protection.

Learning Objectives

Upon completion of this course, you will be able to explain and calculate the following:

• Basic theory and terms of distance protection
• Distance protection zones
• Distance protection characteristics
• Distance protection relay application