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To support projects in the field of energy infrastructure, we are looking for a freelance electrical engineer with a focus on high and extra-high voltage as a primary planner (m/f/d). The projects include grid connection of generation plants (especially wind and solar farms) as well as new construction and refurbishment of substations.
Typical areas of responsibility in this role:**
Development of primary technical concepts and layouts for air- and gas-insulated high and extra-high voltage switchgear (AIS/GIS) from 110 kV to 380 kV.
Design and sizing of primary equipment (circuit breakers, disconnectors, instrument transformers, transformers, etc.).
Creation of wiring diagrams, single-line overview and arrangement drawings.
Performing short-circuit and load flow calculations as well as design of grounding systems and lightning protection.
Technical clarification and coordination with clients, grid operators, authorities and suppliers.
Preparation of technical specifications and tender documents for primary equipment.
Coordination with other disciplines such as secondary technology, structural engineering and control systems.
Support during commissioning and acceptance of the equipment.
Relevant technologies, tools or methods:**
Planning software: AutoCAD, Primtech, REVIT, EPLAN.
Calculation tools: PowerFactory (DIgSILENT), NEPLAN, or manufacturer-specific tools.
Standards & regulations: VDE-AR-N 4120 (TAR High Voltage), IEC standards, EN standards.
Project management tools: MS Project, Jira.
BIM (Building Information Modeling) in plant engineering.
Typical KPIs or success metrics:**
Planning quality: Number of required plan changes after approval < 5%.
Schedule adherence: Meeting planning milestones according to the overall project plan.
Cost efficiency: Staying within budget for the planned primary equipment.
Technical compliance: Successful acceptance of the plant by the grid operator without primary technical non-conformities.
Interface management: Smooth coordination, measured by the number of delays in other disciplines caused by planning errors.
Specific challenges, risks or specifics:**
High complexity and safety requirements in the high and extra-high voltage area.
Necessity to strictly follow grid connection guidelines (TAR) of the respective grid operators.
Long lead times and price fluctuations for large primary components.
Coordination in tight installation spaces, especially during refurbishments.
Increasing requirements due to integration of renewable energies (e.g. reactive power management, FRT behavior).
Ensuring physical safety and occupational health and safety in planning.
Concrete deliverables ("Deliverables"):**
Approval-ready primary technical planning documents (layouts, elevations, sections).
Final wiring diagrams and single-line diagrams.
Technical calculation reports (e.g. short-circuit withstand, grounding).
Created bills of quantities and technical specifications for procurement.
Minutes of technical coordination meetings.
Revision documents and as-built documentation.
Must-Haves:**
Completed degree in electrical engineering (Dipl.-Ing./Master/Bachelor) with a focus on power engineering or a comparable qualification (e.g. technician with many years of experience).
Several years of professional experience in primary technical planning of high and extra-high voltage switchgear (110 kV and above).
Very good knowledge of relevant standards and regulations, especially VDE application rules (TAR High Voltage).
Confident handling of CAD software (e.g. AutoCAD, Primtech) and ideally calculation software (e.g. DIgSILENT PowerFactory).
Nice-to-Haves:**
Experience in planning grid connections for renewable energies (wind/PV).
Knowledge of secondary or control technology of switchgear.
Experience in project management or sub-project management.
Knowledge of BIM methods.
Personal qualities and mindset:**
Strong enthusiasm for technology and a highly precise, detail-oriented working style.
Analytical and systematic thinking to solve complex technical challenges.
Strong communication and teamwork skills for interdisciplinary collaboration.
High sense of responsibility and reliability.
Willingness and ability to continuously learn new technologies and standards.