CyberCertPrepOT Security FundamentalsOT Fundamentals: ICS/SCADA BasicsMEDIUMFree question
A substation device with a microprocessor trips breakers on fault conditions and reports over IEC 61850. Which device class does it belong to?
- A.An intelligent electronic device
- B.A master terminal unit at the substation
- C.A loop controller for a boiler drum
- D.A historian gateway for archive data
Why A is correct
Protection relays and similar microprocessor-based devices in power systems are called IEDs. They measure and protect and they communicate with supervisory systems. An MTU polls devices and a loop controller regulates process variables.
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