Objectives
After completion of this course, each learner will have a good understanding of the protection principles used in current, voltage, frequency, distance, and differential relays. The course offers a working understanding of the OMICRON secondary test equipment hardware, the OMICRON Test Universe software, and how to run and update pre-prepared test templates for various kinds of protective relays.
Software session
Learners will be familiarised with the important aspects of the Test Universe software. Each learner will perform a number of tasks using the test software in the offline mode, i.e. with no CMC connected.
Practical session
Practical test stations for distance, differential and overcurrent protection relays are set up, learners are divided into groups, which rotate through the different test stations performing several tasks at each station, where learners will have to apply the gained knowledge.
Contents
- Basics: Important aspects of protective relay testing in an electrical substation. Safety aspects.
- Basic protection principles of current, voltage, frequency, distance and differential protection relays.
- How to connect a relay to the OMICRON hardware (e.g. voltage and current signals, VT and CT test plugs, trip and pick up signals, DC supply).
- OMICRON hardware overview: CMC 356, CMC 353, CMC430, CMC 256plus, CMC 156, CMA 156, CMS 156, CMS 251, CMS 252.
- Hardware configuration: Setting up the OMICRON hardware in the Test Universe software.
- QuickCMC: Injecting three-phase voltage and current. Manual pick-up and timing tests.
- Overcurrent relays: Entering the settings (using a XRIO converter for a generic overcurrent and earth-fault relay). Testing the pick-up and operating characteristic.
- Distance relays: Entering the settings (using a XRIO converter for an ABB REL511 or SEL 321). Testing the impedance characteristic automatically.
- Differential relays: Entering the settings (using a XRIO converter for a SEL 387, Siemens 7UT51 or ABB SPAD 346). Testing the operating characteristic automatically.
- Transducers: Entering the transducer characteristic. Testing the characteristic automatically.
Pre-requisites for the Training Course
Basic knowledge and understanding of protection systems (different type of relays, CTs, VTs, circuit breakers).
Working knowledge of how to operate Windows programs (e.g. Word, Excel) and the Windows operating system.
Software used
OMICRON Test Universe V4.31 or later
