IED
An IED (Intelligent Electronic Device) is a smart device used in modern power systems to control and protect electrical equipment. Think of it as a sophisticated digital guardian that monitors electrical systems and makes quick decisions to prevent damage. It replaces older mechanical relays and combines multiple functions like measurement, control, and communication in one device. Similar technologies include protective relays and digital controllers. These devices are essential in power plants, substations, and industrial facilities to ensure safe and reliable power distribution.
Examples in Resumes
Configured and programmed IEDs and Intelligent Electronic Devices for substation automation
Led maintenance team responsible for testing and troubleshooting IEDs in 5 major substations
Developed documentation and training materials for new Intelligent Electronic Device installations
Typical job title: "Protection and Control Engineers"
Also try searching for:
Where to Find Protection and Control Engineers
Professional Organizations
Job Boards
Professional Networks
Example Interview Questions
Senior Level Questions
Q: How would you approach implementing a new IED protection scheme in an existing substation?
Expected Answer: A senior engineer should discuss conducting system studies, coordinating with stakeholders, considering compatibility with existing equipment, planning for minimal disruption, and ensuring proper testing and documentation.
Q: What factors do you consider when selecting IEDs for a new project?
Expected Answer: Should mention reliability requirements, communication protocols, maintenance needs, vendor support, cost considerations, and integration with existing systems.
Mid Level Questions
Q: Explain how you would troubleshoot an IED that's not communicating properly.
Expected Answer: Should describe a systematic approach: checking physical connections, verifying settings, testing communication protocols, and using diagnostic tools to identify the problem.
Q: How do you ensure IED settings are properly coordinated with other protective devices?
Expected Answer: Should explain the importance of protection coordination studies, setting verification, and testing procedures to ensure proper operation sequence.
Junior Level Questions
Q: What basic functions does an IED perform?
Expected Answer: Should be able to explain basic protection, monitoring, and control functions, and how IEDs are used to protect electrical equipment.
Q: What safety procedures do you follow when working with IEDs?
Expected Answer: Should demonstrate knowledge of basic electrical safety, proper isolation procedures, and documentation requirements.
Experience Level Indicators
Junior (0-2 years)
- Basic IED programming and settings
- Understanding of electrical protection principles
- Basic testing procedures
- Reading electrical drawings
Mid (2-5 years)
- Protection scheme design
- Troubleshooting complex issues
- Project coordination
- Testing and commissioning
Senior (5+ years)
- System design and engineering
- Protection coordination studies
- Team leadership
- Project management
Red Flags to Watch For
- No understanding of basic electrical protection principles
- Lack of safety awareness
- No experience with protection coordination
- Unable to read electrical drawings and schematics
