Introduction to Protection and Control Module 1 (TECH 0496)

The course will focus on the basic principles of protection systems beginning with the interpretation of single line diagrams and protection zones. This is followed by exposure to instrument transformers including hands-on acceptance testing of CT’s & VT’s, specifically ratio, excitation and polarity. Discussions will include protection and metering diagrams and the critical link between primary and secondary equipment will be explored. An emphasis on international standards and accepted practices including IEEE function numbers will be covered, as will secondary grounding methods for instrument transformers. Safety issues specific to testing and measuring will accompany a formal ‘Job Safety Analysis’. Learner will perform voltage and current measurements on a three phase power systems, comparing phase angles and power quantities to simulate data sent to SCADA via a relay. Power transformer theory including protection device and varying connections are discussed. These concepts are enforced by a practical component. This includes the wiring of a delta / wye connections followed by measurements of phase shifts and how to counteract its effect in a differential protection arrangement. The material will then shift to a greater theoretical study dealing with fault currents and protection co-ordination. This will help delegates understand that the integrity of a distribution network depends on a well conceived and correctly implemented protection philosophy. Examples and spreadsheets are used to show how this is can be created and still satisfy the conflicting requirements of dependability, security and speed.

Credits:

None