Electrical Design – Primary

We provide complete Engineering Design Services for

  • Overall Equipment Layout Plan & Elevation for AIS & GIS Substation building Plan & Sections up to 400kV
  • Relay and Metering SLDs of EHV switchyards, MV/LV switchgear panels
  • Cable trench layout & BOQ
  • Lightning Calculation
  • Internal & External Lighting System Design and layouts
  • MV and LV Cable sizing and cable route layouts
  • Earthing calculation and earthing layout with BOQ
  • Small Power layout and Distribution System
  • Auxiliary Transformer Sizing
  • DG Set Sizing
  • Sizing of Battery & Battery Chargers
  • Sag & tension calculation
  • Lighting Calculation using DIALUX
  • Power Transformer Sizing
  • Electrical Equipment Selection & Sizing, Protections (IEEE, IEC)

Electrical System Design – Secondary

  • Overall Single Line Diagram (SLD)
  • Single Line Diagram with CT/VT
  • Protection Logic Diagram (PLD)
  • AC/DC Single Line Diagram (AC /DC SLD)
  • Cable and Interconnection schedule
  • CT/VT Sizing calculations &adequacy checks
  • Protection schematics (Various Protection system at all voltage levels)
  • Control schematics (Both Conventional & Non-conventional at all voltage levels)
  • Protection Relay Setting Calculation & Protection Coordination Study
  • Signal List for DSM, SOE, SCADA & SAS
  • Schematics preparation of Control and Relay panels for 220/132/66/33/11 kV S/S as per tender specification.
  • CRP designing compatible with automation using numerical relays and auxiliary relays with IEC 61850.

Design Vendor Co-ordination review

  • Power Transformer, Reactor, NER and Auxiliary Transformer Drawing Review and Co-ordination
  • Protection/Control and Synchronizing Scheme review & interface with Switchgear/SAS /Remote Ends
  • EHV/HV/MV/LV Switch gear Drawing Review and Coordination
  • Battery/Charger/UPS Design Review and Coordination

Power System Studies

  • Load Flow Analysis
  • Voltage Dip / Drop Studies
  • Power Factor Correction Studies
  • Short Circuit Studies (IEC / IEEE)
  • Motor Acceleration Studies
  • Transient Stability Analysis
  • Harmonic Analysis
  • Relay Settings and Coordination


Electrical Design

  • CT/ VT sizing calculations.
  • Lighting system design calculation.
  • Grounding system design calculation.
  • Relays setting calculations.
  • Low, MV&HV 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.


Civil, Structural
& Architechtural

  • Architectural Planning & Design
  • Computer Aided Analysis & Design.
  • Switchyard  Structures
  • Control Buildings
  • Development of Civil / Structural  and Architectural Drawings.
  • Technical Specification for Civil  and Structural Works.


Mechanical & Piping Engineering

  • Plant  & Equipment Layout.
  • Air ‐Conditioning & Ventilation System.
  • Power Factor Correction Studies
  • Heat Load Calculations.
  • Firefighting systems
  • Development  of Detailed Piping  Drawings