Protection Engineer - Morrisville​/Raleigh, NC

Delta, founded in 1971, is a global leader in switching power supplies and thermal management products with a thriving portfolio of smart energy-saving systems and solutions in the fields of industrial automation, building automation, telecom power, data center infrastructure, EV charging, renewable energy, energy storage and display, to nurture the development of smart manufacturing and sustainable cities. As a world-class corporate citizen guided by its mission statement, “To provide innovative, clean and energy-efficient solutions for a better tomorrow,” Delta leverages its core competence in high-efficiency power electronics and its ESG-embedded business model to address key environmental issues, such as climate change.

Delta serves customers through its sales offices, R&D centers and manufacturing facilities spread over close to 200 locations across five continents. Delta has 158 sales offices, 72 R&D centers and 48 manufacturing facilities worldwide.

Throughout its history, Delta has received various global awards and recognition for its business achievements, innovative technologies and dedication to ESG. Since 2011, Delta has been listed on the DJSI World Index of Dow Jones Sustainability™ Indices for 11 consecutive years. In 2021, Delta was also recognized by CDP with leadership level ratings for its substantial contribution to climate change and water security issues and named Supplier Engagement Leader for its continuous development of a sustainable value chain.

The Protection Engineer is responsible for the design, analysis, and validation of protection systems for microgrids and Solid‑State Transformer (SST)‑based power systems. This role ensures safe and reliable operation of the system under both normal and faulted conditions through proper protection scheme design, circuit breaker selection and control, and coordination studies.

The Protection Engineer works closely with simulation, HIL, controls, and system design teams to develop protection strategies that align with system architecture, grid requirements, and operational constraints.

At Delta, we’re leading the energy transition with innovative solutions in solar inverters, energy storage systems, and EV charging infrastructure. Our technologies are helping utilities, businesses, and communities decarbonize and build resilient, intelligent energy ecosystems. Join us in creating a cleaner, smarter energy future.

• Design and developprotection schemes for microgrid systems and SST‑based architectures
• Define protection philosophy for:
• Grid‑connected and islanded operation
• Mode transitions and reconnection
• Abnormal and fault conditions
• Select and specify protection elements including:
• Overcurrent, differential, distance, and voltage/frequency protections
• Inverter‑based protection strategies for limited fault current systems

• Perform circuit breaker sizing and specificationbased on:
• Fault current levels (including inverter‑limited contributions)
• Voltage class, duty cycle, and interrupting ratings
• System topology and grounding scheme
• Define breaker control requirements including:
• Trip logic and coordination with protection relays
• Reclosing and sequencing logic (where applicable)
• Integration with system controls and microgrid controllers
• Ensure proper selection of switching devices for both AC and DC (if applicable)

• Performprotection coordination and selectivity studiesacross the system.
• Analyze and coordinate:
• Time‑current characteristics (TCC curves)
• Relay settings and grading margins
• Breaker trip timing and sequencing
• Ensure coordination between:
• Utility interfaces
• SST protection
• Downstream feeders and loads
• DERs (where applicable)
• V…