Substation Primary Plant Design Engineer

Primary Plant Design Engineer – REDAS Engineering & Construction

• Location:
  
  Scotland, UK
• Employment Type:
  
  Full-Time
• Job Type: Permanent / Contract – depending on project requirements

REDAS Engineering & Construction is a growing engineering and construction company delivering specialist electrical engineering, construction, commissioning and infrastructure solutions across the UK.

We are seeking an experienced Primary Plant Design Engineer to join our engineering team in Scotland. The successful candidate will be responsible for the design and development of HV substation primary plant and associated electrical infrastructure, from concept and detailed design through to construction, commissioning and handover.

This is an excellent opportunity for an experienced engineer to contribute to major HV, grid connection and renewable energy infrastructure projects across Scotland and the wider UK.

As a Primary Plant Design Engineer, you will be responsible for developing safe, technically compliant and constructable designs for HV substations and associated primary electrical equipment.

You will work closely with P&C, secondary and LV engineers, civil/structural engineers, project managers, commissioning engineers, construction teams, clients, DNOs/IDNOs and equipment manufacturers to ensure that all aspects of the substation design are fully coordinated.

Develop detailed primary plant designs for HV and EHV substations.

Produce and review substation electrical single-line diagrams and primary system arrangements.

Develop substation general arrangements, equipment layouts and plant arrangements.

Design and specify HV primary equipment including switch gear, transformers, circuit breakers, disconnectors and earthing equipment.

Develop equipment positioning and arrangement drawings.

Establish electrical clearances, phase-to-phase and phase-to-earth clearances.

Design busbar arrangements and connections.

Develop transformer and associated HV/LV connection arrangements.

Design and coordinate HV cable and overhead line interfaces.

Develop substation gantry, busbar and conductor arrangements where applicable.

Coordinate primary plant designs with civil, structural, secondary, protection and control disciplines.

Carry out electrical design calculations and technical assessments.

Support equipment selection and preparation of technical specifications.

Review manufacturer drawings and technical documentation.

Review equipment datasheets and ensure compliance with project requirements.

Produce and check construction-ready design documentation.

Participate in design reviews, HAZID/HAZOP and technical coordination meetings where required.

Identify technical risks, design constraints and constructability issues.

Provide engineering support during construction and commissioning.

Attend site to resolve design queries and provide technical assistance.

Review installation requirements and ensure adequate access, maintenance and operational clearances.

Review red‑line drawings and incorporate site changes into as‑built documentation.

Liaise with clients, DNOs, IDNOs, equipment manufacturers and other project stakeholders.

Ensure designs comply with relevant UK standards, legislation, client specifications and industry best practice.

The successful candidate should have experience with some or all of the following:

HV and EHV substations.

11kV, 33kV, 66kV, 132kV and/or higher‑voltage systems.

Power transformers.

Disconnectors/isolators.

Earth switches.

Current transformers (CTs).

Voltage transformers (VTs).

Surge arresters.

Busbars and busbar systems.

Post insulators.

Cable sealing ends and…