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Substation Design


JEC provides Substation design as a major and unique design service. Our scope of work often extends from layout, base and detailed designs to grounding, control, protection and schematics. It covers HV and MV panel designs as well. All are done through all phases of specifications, selection and design. Scope of work of substation design may be summarized in the following tasks: 

A. Electrical design calculation & drawings:

  • CT/ VT sizing calculations.
  • Lighting system design calculations.
  • Grounding system design calculations.
  • Relays setting calculations.
  • Low, MV HV voltage cables and breakers sizing calculations.
  • Battery charger sizing calculations.
  • Lightning system design calculations.
  • Operational SLD
  • AC/ DC SLD
  • Protection & metering sld.
  • Protection logic diagram.
  • SCADA points lists.
  • Interlocking logic diagram.
  • Duct banks, cable trenches layout, sections and details.
  • Lightning (shielding) protection layout and details.
  • Indoor/outdoor lighting layout details.
  • Small power distribution layout details.
  • Floor opening – switchgear control building. 

B.Civil design calculations drawings including:
  • Design calculation of switchgear control building
  • Design calculation of power transformer fire wall foundation.
  • Design calculations of auxiliary transformer fire wall foundation.
  • Design calculation of oil tank.
  • Design calculation of water tank ,septic tank soak pit
  • Design of gantry structure.
  • Design calculation for HV switchgear foundation and steel support.
  • Column and footing location plan and sections for control building.
  • Ground floor roof framing plan, opening layout, slab rebar details and sections.
  • Staircase layout sections and rebar’s details.
  • Basement retaining wall opening and rebar details
  • Hand hole, man hole trenches and duct banks details.


C. Architectural drawings including:
  • Floor plans
  • Buildings elevation
  • Buildings and walls sections
  • Stair cases plans, sections details
  • Site design development plan
  • Layout and details of raised floor and false ceiling
  • Doors, windows, finishing schedules 
  • Boundary wall plan, elevation and details.
  • Architecture details.