CoreGrid Engineering

Engineering deliverables

Engineering Deliverables Library

144 representative items, kept in four classes: engineering drawings, design calculations, power system studies, and schedules or documents. Search by discipline, infrastructure type and class. Each shows why it matters, its typical inputs and its typical outputs.

Every project defines its own deliverables in a master deliverable list (MDL), following the client’s specification and the codes it names. The items below are representative: they use the vocabulary of public utility drawing lists as an indicative guide, not as a mandatory register, and they describe the kind of work CoreGrid prepares in general terms without project data. A contract includes only the items its specification and MDL call for.

Discipline
Infrastructure
Class

Electrical Engineering Drawings

29 items

The Single Line Diagram comes first, then layouts, the Erection Key Diagram, earthing and DSLP layouts, auxiliary systems, illumination and cable routing.

How it is prepared, for example: Earth grid. Soil resistivity and fault data come from the client. The Earth Grid Design Calculation sizes the grid and checks GPR, step and touch voltage against the project limits. The Earth Mat Layout drawing then shows the conductors, rods and bonding. Both are reviewed and issued with a comment resolution sheet.

Single Line Diagram (SLD), Bus Scheme & Bay Configuration

DrawingRelated service

Shows the bus scheme, bays, feeder and transformer connections and principal equipment ratings on one diagram. It is the reference from which layouts, calculations and schedules are developed and checked. The bay list is a supporting input, not the drawing title.

Typical inputs
System data, utility scheme requirements, bay list
Typical outputs
SLD with bus scheme, bay configuration, ratings and notes
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Erection Key Diagram (EKD): Plan & Section

DrawingRelated service

EKD stands for Erection Key Diagram. In plan and section it identifies, bay by bay, the equipment, bus, jumpers, connectors and fittings of the yard so that it can be erected as designed. Content and format follow the client specification.

Typical inputs
Approved SLD, switchyard GA and sections, bill of fittings
Typical outputs
Erection Key Diagram in plan and section
  • AIS/GIS substations
  • Pooling substations
  • HVDC

Overall General Arrangement (GA) Drawing: Switchyard

DrawingRelated service

Plan of the air-insulated yard showing bays, bus levels, equipment positions, line entries, gantries and clearances, coordinated with civil layout, cable routes and the approved single-line diagram.

Typical inputs
SLD, bay list, vendor dimensions, plot boundary
Typical outputs
Yard plan with bays, gantries, roads and clearances
  • AIS/GIS substations
  • Pooling substations
  • HVDC

GIS Hall Layout and Interface Drawing

DrawingRelated service

Shows the GIS equipment arrangement against the building, bus duct and cable entries, supports and maintenance space, aligned with the supplier's approved drawings and the civil building design.

Typical inputs
GIS supplier drawings, building outline, cable entries
Typical outputs
Hall layout and interface drawing
  • AIS/GIS substations
  • Pooling substations

Electrical Layout Plan, Sections and Bay Elevations

DrawingRelated service

Plan and sectional views through each bay showing equipment positions, heights, bus levels, terminal connections and electrical clearances, so that structures, foundations and erection can be coordinated from one reference.

Typical inputs
Approved GA, equipment heights, bus levels
Typical outputs
Bay sections and elevations with clearances
  • AIS/GIS substations
  • Pooling substations
  • HVDC

Equipment placement and clearance drawing

DrawingRelated service

Locates each item of primary equipment and records phase-to-phase, phase-to-earth and sectional clearances against the project criteria, with equipment dimensions taken from approved vendor data.

Typical inputs
Vendor outline drawings, clearance criteria
Typical outputs
Equipment placement drawing with checked clearances
  • AIS/GIS substations
  • Pooling substations
  • BESS

Direct Stroke Lightning Protection (DSLP) Layout

DrawingRelated service

Shows mast and shield-wire positions and heights on the switchyard plan, together with the protected zone, so that structure and foundation drawings use the same positions.

Typical inputs
Shielding calculation results, structure positions
Typical outputs
Mast and shield-wire layout drawing
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS
  • HVDC

Earth Mat Layout / Earthing Grid Layout Drawing

DrawingRelated service

Shows the earth grid conductors, rods, risers and connections to equipment and structures, together with conductor sizes and burial depth as established by the earthing calculation.

Typical inputs
Earthing study results, equipment layout
Typical outputs
Earth mat layout with conductor sizes and rods
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS
  • HVDC

Equipment earthing and bonding details

DrawingRelated service

Details how equipment, structures, fences, cable trays and the control building are bonded to the grid, including connection types and conductor sizes, for installation clarity.

Typical inputs
Earth mat layout, equipment list, vendor earthing points
Typical outputs
Bonding and riser details by equipment type
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

LT AC Auxiliary System Single Line Diagram

DrawingRelated service

Shows the low-voltage AC auxiliary supply arrangement, including sources, changeover, distribution boards and major loads, as the base for the load list and cable design.

Typical inputs
Auxiliary load list, supply sources, DG/UPS needs
Typical outputs
LTAC single-line diagram
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

LT DC Auxiliary System Single Line Diagram (Battery, Charger and DCDB Interface)

DrawingRelated service

Shows battery banks, chargers, DC distribution boards and their major outgoing feeders, so that sizing, cable and panel interface work follow a single agreed arrangement.

Typical inputs
DC load list, battery and charger data
Typical outputs
DC distribution single-line diagram
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Control & Protection Schematics / SAS–SCADA Interface Drawings

DrawingRelated service

Shows control and protection scheme interfaces and SAS/SCADA signal paths where these are within CoreGrid’s contract. Detailed vendor panel manufacturing drawings are not assumed to be prepared by CoreGrid.

Typical inputs
SLD, protection scheme, panel supplier data
Typical outputs
Interface diagram between primary equipment and panels
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Cable block diagram

DrawingRelated service

Shows the cable connections between equipment, marshalling boxes and panels at block level, so interfaces between yard, building and panel suppliers can be agreed.

Typical inputs
SLD, panel list, cable schedule
Typical outputs
Block diagram of cable connections
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Power & Control Cable Routing / Cable Trench Layout

DrawingRelated service

Shows trench and tray routes, crossings and entries to buildings, coordinated with civil trench design, earthing and equipment positions to avoid clashes.

Typical inputs
Equipment layout, cable schedule, civil layout
Typical outputs
Trench and routing layout with tray sizes
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Indoor & Outdoor Illumination Layouts

DrawingRelated service

Shows fixture locations, mounting heights, normal and emergency lighting circuits, coordinated with structures, equipment and the cable layout.

Typical inputs
Illumination calculation, structures, cable routes
Typical outputs
Lighting layouts with fixtures and circuits
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

PV Plant Single Line Diagram (DC / AC and Auxiliary SLDs as applicable)

DrawingRelated service

Shows how PV blocks, inverters, inverter-duty transformers and collector feeders connect to the pooling or plant substation.

Typical inputs
Block layout, inverter and transformer data, collection scheme
Typical outputs
LT/HT single-line diagram of the plant
  • Solar, wind & hybrid
  • Pooling substations

PV Module / String / Array Layout and Inverter–Transformer Station Layout

DrawingRelated service

Arranges blocks, inverter stations, transformers and cable corridors within the plot, as the base for electrical and civil design.

Typical inputs
Plot boundary, capacity, equipment footprints, access needs
Typical outputs
Block layout with equipment and corridors
  • Solar, wind & hybrid

Wind Farm Single Line Diagram, WTG Transformer and MV Collector Feeder Scheme

DrawingRelated service

Groups turbines onto MV collector feeders and shows unit transformers, feeder breakers and the connection to the pooling substation.

Typical inputs
Turbine positions, unit transformer data, collection voltage
Typical outputs
Collector SLD and feeder grouping
  • Solar, wind & hybrid
  • Pooling substations

Plant earthing and lightning protection layout

DrawingRelated service

Sets out earthing and lightning protection for array, inverter stations and storage areas, coordinated with the substation earth grid.

Typical inputs
Soil data, layout, equipment earthing points
Typical outputs
Earthing and lightning protection layout
  • Solar, wind & hybrid
  • BESS

Pooling Substation Single Line Diagram, Collector Feeders and Grid Interface

DrawingRelated service

Defines incoming collector feeders, pooling transformers, bus arrangement, metering points and outgoing evacuation bays.

Typical inputs
Collector feeder count, transformer data, utility requirements
Typical outputs
Pooling substation SLD with bay scheme
  • Pooling substations

Energy metering scheme

DrawingRelated service

Shows main and check metering, CT and VT cores and the connection to the utility’s metering requirements.

Typical inputs
Utility metering requirements, SLD
Typical outputs
Metering scheme drawing and core allocation
  • Pooling substations
  • Solar, wind & hybrid
  • BESS
  • AIS/GIS substations

BESS eBoP Single Line Diagram: PCS, Transformer, Collector and Interconnection

DrawingRelated service

Shows battery blocks, PCS units, MV step-up transformers, MV switchgear and the connection to the pooling or grid substation.

Typical inputs
Block configuration, PCS and transformer data, connection point
Typical outputs
BESS SLD with ratings and protection points
  • BESS

BESS block layout and spacing plan

DrawingRelated service

Arranges containers, PCS skids and transformers with the access and separation distances set by the OEM and the applicable requirements.

Typical inputs
Container footprints, OEM spacing data, plot and access
Typical outputs
Block layout with separation distances
  • BESS

Converter station layout interface drawing

DrawingRelated service

Coordinates the AC yard, converter transformer yard, filter yard and DC yard boundaries with the converter supplier’s layout.

Typical inputs
OEM layout, AC yard arrangement, interface list
Typical outputs
Interface drawing with agreed boundaries
  • HVDC

AC filter and reactive equipment yard layout

DrawingRelated service

Arranges AC filter banks and reactive equipment with clearances, bus connections and access, from the supplier’s ratings.

Typical inputs
Filter and reactor data, clearance criteria
Typical outputs
Filter yard layout and sections
  • HVDC

Protection & Metering Single Line Diagram (Protection SLD)

DrawingRelated service

Shows protection functions, CT and VT cores, metering points and trip paths bay by bay on the approved SLD, where the protection scheme is in CoreGrid’s scope. It is the reference for relay, metering and panel interface work.

Typical inputs
Approved SLD, protection philosophy, utility metering requirements
Typical outputs
Protection and metering SLD by bay
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

DC / AC Cable Routing and Plant MV Collection Layout (Solar)

DrawingRelated service

Lays out DC string and AC cable routes and the MV collection network between array blocks, inverter stations and the plant or pooling substation.

Typical inputs
Array layout, cable sizing results, site constraints
Typical outputs
Cable routing and MV collection layout drawings
  • Solar, wind & hybrid

Wind Farm Collector Cable / Overhead Routing Layout

DrawingRelated service

Shows how turbine transformers are grouped onto MV collector feeders and routed to the pooling substation by cable or overhead line.

Typical inputs
Turbine layout, feeder grouping, site and road layout
Typical outputs
Collector routing layout
  • Solar, wind & hybrid

Hybrid Plant Shared Collector and Evacuation Scheme

DrawingRelated service

Shows how solar, wind and optional storage share collector circuits, the pooling bay and the grid connection, with common capacity and protection interfaces.

Typical inputs
Plant capacities, connection approval, protection philosophy
Typical outputs
Shared collector and evacuation SLD
  • Solar, wind & hybrid
  • Pooling substations
  • BESS

Electrical Design Calculations

19 items

Sizing and design checks that stand behind the drawings. They are kept apart from network studies.

Conductor & Busbar Sizing / Selection Calculation

CalculationRelated service

Selects conductor size from continuous current, thermal limits and short-circuit criteria, and records the standards, assumptions and margins used in the choice.

Typical inputs
Load current, fault level, ambient data, conductor catalogue
Typical outputs
Selected conductor and busbar sizes with margins
  • AIS/GIS substations
  • Pooling substations
  • HVDC

Flexible / Strung Busbar Sag–Tension Calculation (Substation)

CalculationRelated service

Determines busbar conductor sag and tension under specified temperature, wind and span conditions, and checks resulting clearances and the tension passed to gantries and equipment terminals. This is a substation calculation and is different from transmission line sag–tension and stringing charts.

Typical inputs
Span lengths, conductor data, temperature and wind cases
Typical outputs
Sag and tension tables and terminal loads
  • AIS/GIS substations
  • Pooling substations
  • HVDC

Busbar Short-Circuit Force (SCF) & Critical Span Calculation / Mechanical Support Load Check

CalculationRelated service

Evaluates the electrodynamic effect of short-circuit current on conductors, spacers, insulators, terminals and supports, checks the critical span, and gives the forces that structure and foundation design must carry. A mechanical design calculation, distinct from the short-circuit (fault level) network study.

Typical inputs
Fault current and duration, span, spacer and insulator data
Typical outputs
Short-circuit forces, critical span check and support loads
  • AIS/GIS substations
  • Pooling substations
  • HVDC

Direct Stroke Lightning Protection (DSLP) Calculation

CalculationRelated service

Checks that lightning masts and shield wires protect the equipment envelope using the project's chosen method and protection criteria, and records the assumptions, heights and coverage achieved.

Typical inputs
Yard layout, equipment heights, chosen shielding method
Typical outputs
Shielding calculation with protected zones
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS
  • HVDC

Earthing System / Earth Grid Design Calculation

CalculationRelated service

Uses measured soil resistivity and fault data to size grid conductors and check grid resistance, ground potential rise (GPR), step and touch voltages against allowable limits. Non-uniform soil can be modelled in specialist software such as SES-CDEGS. No result is assumed before the calculation is complete.

Typical inputs
Soil resistivity data, fault current and duration, grid layout basis
Typical outputs
Grid design with GPR, step and touch voltage checks
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS
  • HVDC

Equipment Rating Check: CT, VT/CVT Burden & Sizing, Surge Arrester

CalculationRelated service

Reviews instrument transformer and arrester ratings, burdens and classes against protection, metering and system requirements, and flags mismatches with vendor data for resolution.

Typical inputs
SLD, fault level, protection and metering needs
Typical outputs
Rating check sheet for CT, CVT/PT and LA
  • AIS/GIS substations
  • Pooling substations
  • BESS

Equipment Rating / Selection Check: Circuit Breaker, Isolator, Earth Switch

CalculationRelated service

Compares rated voltage, current, short-circuit and operating duty of switching equipment with the project single-line diagram and fault data, and records any exception for the client.

Typical inputs
Fault level, continuous current, bay function
Typical outputs
Rating check sheet for CB, isolator and earth switch
  • AIS/GIS substations
  • Pooling substations
  • BESS

Neutral Grounding Resistor (NGR) Sizing Calculation

CalculationRelated service

Sizes a neutral grounding resistor or device for equipment such as shunt reactors from the specified fault current and duration, recording the assumptions and the data needed from the supplier.

Typical inputs
Reactor data, specified fault current and duration
Typical outputs
NGR rating, time rating and supplier data list
  • AIS/GIS substations
  • Pooling substations
  • HVDC

Station Battery Sizing Calculation (220 V / 48 V or specified DC systems)

CalculationRelated service

Sizes the substation DC battery from the DC load schedule, duty cycle, autonomy period and correction factors specified for the project. This is not the sizing of a grid-scale BESS, which is listed separately.

Typical inputs
DC duty cycle, autonomy, ageing and temperature factors
Typical outputs
Battery capacity and cell count
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Battery Charger Sizing Calculation

CalculationRelated service

Determines charger rating from continuous DC load, battery recharge requirement and design margins, and records the criteria taken from the specification.

Typical inputs
Battery capacity, recharge time, standing loads
Typical outputs
Charger rating and configuration
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Power & Control Cable Sizing, Voltage-Drop and Short-Circuit Withstand Calculation

CalculationRelated service

Selects power and control cable sizes from load current, installation conditions, short-circuit rating and voltage drop limits, with the assumptions and derating factors recorded.

Typical inputs
Load currents, route lengths, installation method, fault level
Typical outputs
Cable sizes with voltage-drop and fault checks
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Indoor & Outdoor Illumination Design Calculation

CalculationRelated service

Calculates illuminance for yard areas and rooms from the lighting criteria given for the project, using fixture data supplied by the manufacturer, and records the assumptions.

Typical inputs
Lux criteria, fixture photometric data, areas
Typical outputs
Illuminance results against project criteria
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

String Configuration, Inverter and Transformer Sizing Calculation

CalculationRelated service

Matches inverter and transformer ratings to the block capacity and connection voltage, recording the data needed from suppliers.

Typical inputs
Block DC and AC capacity, inverter data, site conditions
Typical outputs
Rating selection and supplier data requirements
  • Solar, wind & hybrid
  • Pooling substations

DC / AC Cable Sizing, Voltage-Drop and Loss Calculation (Solar)

CalculationRelated service

Sizes collection cables for current, voltage drop, losses and fault withstand, and lays out routes between blocks and the collector substation.

Typical inputs
Plant layout, cable routes, loading and installation data
Typical outputs
Cable sizes, loss estimate and routing layout
  • Solar, wind & hybrid
  • Pooling substations

MV Collector Cable / Conductor Sizing, Voltage-Drop and Loss Evaluation (Wind)

CalculationRelated service

Sizes and routes MV cables or overhead collector lines between turbines and the substation, with losses and voltage drop.

Typical inputs
Turbine layout, terrain and crossings, loading
Typical outputs
Collector cable sizes, route layout and losses
  • Solar, wind & hybrid
  • Pooling substations

BESS MW / MWh Capacity, Duty-Cycle and Efficiency Sizing

CalculationRelated service

Relates the required power and energy at the connection point to installed capacity, allowing for usable depth of discharge, round-trip efficiency, auxiliary consumption, duty cycle and degradation assumptions. It is not the sizing of a substation DC battery.

Typical inputs
Application, MW and MWh need, duty cycle, OEM data
Typical outputs
Installed MW and MWh with stated assumptions
  • BESS

Relay Setting Calculations / Relay Setting Sheets

CalculationRelated service

Where contracted, derives relay settings from the protection coordination study, equipment data and utility requirements, and records them as setting sheets. The network study is listed separately as the Protection Coordination Study and is not counted twice.

Typical inputs
Protection coordination study, relay and equipment data, utility requirements
Typical outputs
Relay setting calculations and setting sheets
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Station Auxiliary LT AC/DC Load Calculation; Auxiliary Transformer, UPS and DG Sizing

CalculationRelated service

Totals continuous, intermittent and emergency loads on the auxiliary AC and DC systems, and sizes auxiliary transformers, UPS and DG sets where these are within the contract.

Typical inputs
Auxiliary load lists, duty cycles, supply philosophy
Typical outputs
Load calculation and sizing of auxiliary sources
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

BESS PCS and Step-up Transformer Rating Calculation

CalculationRelated service

Matches PCS and MV step-up transformer ratings to the block capacity, charge and discharge duty and the connection voltage, using OEM data.

Typical inputs
OEM PCS data, block capacity, connection voltage
Typical outputs
PCS and transformer rating basis
  • BESS

Power System & Protection Studies

10 items

Genuine network and system studies. Design calculations and relay setting sheets are listed under Electrical.

How it is prepared, for example: Short-circuit study. Grid fault data and equipment impedances are collected, the cases are agreed with the client, fault levels are calculated per bus and case, and the results feed equipment ratings, earthing and protection inputs.

Insulation Coordination Study

StudyRelated service

Where included in scope, reviews arrester selection and protective margins against equipment withstand levels using the project's system data and applicable guidance.

Typical inputs
System voltages, arrester data, equipment withstand levels
Typical outputs
Protective margins and arrester recommendations
  • AIS/GIS substations
  • Pooling substations
  • HVDC

Short-Circuit / Fault Level Study

StudyRelated service

A network study that calculates fault levels at each bus for the cases agreed with the client. Its results feed equipment ratings, earthing and protection. The mechanical effect of the fault current on busbars is a separate calculation (busbar SCF).

Typical inputs
Grid fault data, network and equipment impedances
Typical outputs
Fault levels per bus and case, with assumptions
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Load Flow / Power Flow Study

StudyRelated service

Where commissioned, checks voltages, loading and losses for defined operating cases, for example at a renewable plant’s point of connection.

Typical inputs
Network model, generation and load cases, grid data
Typical outputs
Voltage and loading results against stated limits
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Reactive Power Compensation / Voltage Regulation Study

StudyRelated service

Where commissioned, compares the plant’s reactive capability at the connection point with the grid requirement, and identifies any compensation need.

Typical inputs
Inverter or WTG capability curves, grid code requirement
Typical outputs
Capability chart and compensation recommendation
  • Solar, wind & hybrid
  • Pooling substations
  • BESS

Harmonic Analysis / Harmonic Load Flow Study

StudyRelated service

Where commissioned, assesses harmonic distortion from inverters or converters against the applicable limits and informs any filter requirement.

Typical inputs
Harmonic emission data, network impedance, limits
Typical outputs
Distortion results and filter recommendation
  • Solar, wind & hybrid
  • Pooling substations
  • BESS
  • HVDC

HVDC insulation coordination and harmonic study review

StudyRelated service

Where contracted, reviews or prepares insulation coordination and harmonic studies against the project data, with specialist inputs where needed.

Typical inputs
Station data, supplier studies, system data
Typical outputs
Review comments or study report
  • HVDC

Protection Coordination Study / Selectivity Study

StudyRelated service

Checks that protection devices discriminate correctly for faults and overloads across the network, using fault levels, equipment data and the protection scheme. Relay setting sheets are the deliverable that follows from this study.

Typical inputs
Network model, fault levels, relay and CT data
Typical outputs
Coordination curves and selectivity findings
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Very Fast Transient Overvoltage (VFTO) Study for GIS

StudyRelated service

Examines the very fast transients that disconnector switching can cause in gas-insulated switchgear. It is different from a lightning study and is taken on where GIS is used, the supplier data are available and specialist modelling support exists, as applicable to the contracted scope.

Typical inputs
GIS layout and supplier data, switching cases
Typical outputs
VFTO magnitudes and mitigation findings
  • AIS/GIS substations
  • Pooling substations

Switching Transient / Transient Overvoltage Study

StudyRelated service

Where required, examines overvoltages from switching of lines, cables, capacitors, reactors and transformers, and checks the margins to equipment withstand levels. Taken on as applicable to the contracted scope.

Typical inputs
Detailed network and equipment models, switching cases
Typical outputs
Overvoltage levels and mitigation findings
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS
  • HVDC

Grid Interconnection / Grid Connectivity Study

StudyRelated service

Checks that a renewable plant, pooling substation or BESS can connect to the grid at the chosen voltage and point, covering voltage, reactive capability, fault level contribution and power quality against the connection requirements, as contracted.

Typical inputs
Plant and grid data, connection approval, grid-code requirements
Typical outputs
Study report with findings against connection requirements
  • Solar, wind & hybrid
  • Pooling substations
  • BESS

Electrical Schedules, Quantities & Documentation

15 items

Schedules, quantities, MDL, CRS and registers are document-control items, never listed as drawings.

Electrical Engineering Design Basis / Criteria Document

Schedule / documentRelated service

Records voltage levels, fault levels, ratings, clearances, environmental data and the assumptions behind them, so every later calculation and drawing can be traced to an agreed starting point.

Typical inputs
Specification, system data, site and climatic data
Typical outputs
Design basis report with assumptions register
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

LT AC Auxiliary Load List

Schedule / documentRelated service

Lists each AC auxiliary load with rating, supply point and operating pattern, giving the basis for transformer, cable and distribution board selection.

Typical inputs
Equipment auxiliary data, building services loads
Typical outputs
LTAC load list with demand and diversity
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

DC Load and Duty-Cycle Schedule

Schedule / documentRelated service

Lists continuous and momentary DC loads with timing, forming the input for battery and charger sizing and for reviewing the design with the client.

Typical inputs
Relay, control and emergency loads, duty periods
Typical outputs
DC load and duty-cycle schedule
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Power & Control Cable Schedule and Cable Termination Schedule

Schedule / documentRelated service

Lists each cable with tag, size, core count, route, termination points and length, giving a controlled reference for procurement, installation and as-built records.

Typical inputs
Cable sizes, routes, equipment list
Typical outputs
Cable schedule with types, lengths and routes
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Erection BOQ / Overall BOQ and Quantity Take-off (Electrical)

Schedule / documentRelated service

Quantifies primary equipment, conductors, fittings and accessories from the approved layout, with stated assumptions, as a basis for procurement and cost control.

Typical inputs
SLD, GA, bay list
Typical outputs
Equipment BOQ with quantities and descriptions
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Cable and accessories bill of quantities

Schedule / documentRelated service

Quantifies cables, glands, lugs, trays and accessories from the cable schedule and routing, with allowances stated separately for review.

Typical inputs
Cable schedule, routing layout
Typical outputs
Cable and accessories BOQ
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Signal list and SCADA interface sheet

Schedule / documentRelated service

Where contracted, lists the signals exchanged between substation equipment and the control system, with type and source, for agreement among suppliers.

Typical inputs
SLD, control philosophy, equipment I/O data
Typical outputs
Signal list for SCADA and control system
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Electrical Master Drawing / Deliverable List (MDL)

Schedule / documentRelated service

Lists each electrical drawing, calculation and document with number, title, revision and planned submission, so progress and review status can be tracked by all parties.

Typical inputs
Contract scope, specification, client numbering
Typical outputs
Electrical MDL with titles, numbers and dates
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Comment Resolution Sheet (CRS)

Schedule / documentRelated service

Records each client or vendor comment with the response given and the revision in which it was closed, forming an auditable trail through the review cycle.

Typical inputs
Client comments on a submission
Typical outputs
Response per comment, with revision and status
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS
  • Transmission lines
  • HVDC

Drawing register and transmittal log

Schedule / documentRelated service

Tracks every issued document by number, revision, date and status, together with the transmittal in which it was sent, to keep submissions controlled.

Typical inputs
Submissions, client numbering convention
Typical outputs
Register of drawings, revisions and transmittals
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS
  • Transmission lines

Interlocking and control philosophy document

Schedule / documentRelated service

Where assigned, records the switching interlocks and control logic the client requires, as a reference for the panel and SCADA suppliers.

Typical inputs
SLD, client operating philosophy, equipment data
Typical outputs
Interlock tables and control philosophy
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Power evacuation scheme report

Schedule / documentRelated service

Describes how plant output reaches the grid: collector system, pooling substation, transformers and evacuation line, with the assumptions behind each choice.

Typical inputs
Plant capacity, connection approval data, route options
Typical outputs
Evacuation scheme description and SLD reference
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

BESS Auxiliary Power and Load List

Schedule / documentRelated service

Lists auxiliary loads such as HVAC, fire detection and controls, which affect auxiliary transformer sizing and net energy delivered.

Typical inputs
OEM auxiliary data, building and site services
Typical outputs
Auxiliary load list and supply arrangement
  • BESS

BESS protection, control and EMS/SCADA interface list

Schedule / documentRelated service

Defines signals and control modes exchanged between the BMS, PCS, EMS or plant controller and the substation SCADA.

Typical inputs
OEM interface documents, control philosophy
Typical outputs
Interface list and control mode summary
  • BESS

Interface documents (electrical, civil, vendor and utility)

Schedule / documentRelated service

Records the loads, levels, positions and signals passed between disciplines and parties, so that a change in one document is traced to the documents that depend on it.

Typical inputs
Approved layout, vendor data, utility requirements
Typical outputs
Interface document and register entries
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS
  • Transmission lines

Civil & Structural Design Calculations

11 items
How it is prepared, for example: Equipment foundation. Vendor drawings give weights and anchor positions and the geotechnical report gives allowable pressures. The footing and pedestal are designed and checked in the calculation, then drawn with reinforcement and referenced to the foundation layout.

Switchyard Gantry, Portal / Beam and Bus Support Structure Design Calculation

CalculationRelated service

Analyses columns, beams and bracing under conductor tension, wind, seismic and short-circuit loads from the electrical design, and sizes members and connections to the project code.

Typical inputs
Conductor tensions, wind, seismic and SCF loads, GA
Typical outputs
Member sizes and checks for gantries and portals
  • AIS/GIS substations
  • Pooling substations
  • HVDC

Equipment Support Structure Design Calculation

CalculationRelated service

Designs supports for breakers, isolators, instrument transformers and arresters for equipment weight, terminal loads and operating forces taken from approved vendor drawings.

Typical inputs
Equipment weights, terminal loads, wind data
Typical outputs
Support structure member design
  • AIS/GIS substations
  • Pooling substations
  • BESS

Anchor Bolt, Base Plate and RCC Connection Design

CalculationRelated service

Checks bolts, base plates and anchorage against reactions from the structural analysis, and records the load cases and assumptions governing the design.

Typical inputs
Reactions, vendor base details, concrete grade
Typical outputs
Bolt, base plate and anchor design
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Lightning mast and shield-wire support design

CalculationRelated service

Designs masts or shield-wire supports for wind and wire loads at the positions fixed by the lightning protection layout, including their foundation reactions.

Typical inputs
DSLP layout, wind and wire loads
Typical outputs
Mast and support design with reactions
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Transformer / Reactor Foundation Design Calculation

CalculationRelated service

Designs foundations for transformers and reactors from vendor weights, jacking and short-circuit loads and soil data, covering bearing, overturning, sliding and reinforcement.

Typical inputs
Transformer or reactor weight, vendor plinth details, soil report
Typical outputs
Foundation design with bearing and stability checks
  • AIS/GIS substations
  • Pooling substations
  • HVDC

Equipment Foundation Design Calculation (CB, CT/CVT, Isolator, LA, GIS as applicable)

CalculationRelated service

Designs pedestal and footing for yard equipment from support reactions, with checks for soil pressure, uplift and overturning as the soil data permit.

Typical inputs
Equipment loads, soil report, structure reactions
Typical outputs
Equipment foundation design
  • AIS/GIS substations
  • Pooling substations
  • BESS

Gantry and Structure Foundation Design Calculation

CalculationRelated service

Designs footings and pedestals for gantry and termination structures against compression, uplift, shear and moment, using the geotechnical report for the site.

Typical inputs
Structure reactions, soil report
Typical outputs
Gantry and tower foundation design
  • AIS/GIS substations
  • Pooling substations
  • HVDC

Control Room (MCR / CRB) and GIS Hall Structural Design Calculation

CalculationRelated service

Designs slabs, beams, columns and footings of the control building for dead, live, wind and seismic loads and for cable trench and equipment openings.

Typical inputs
Architectural layout, loads, soil report, seismic zone
Typical outputs
Building frame and foundation design
  • AIS/GIS substations
  • Pooling substations
  • BESS

Transformer / Reactor Oil Pit, Fire Wall and Sump Design Calculation

CalculationRelated service

Sizes oil pits, bunds or sumps for the oil volume and rain allowance specified for the project, and records outlet and separation arrangements.

Typical inputs
Oil volume, rainfall, fire separation criteria
Typical outputs
Pit, bund and sump design
  • AIS/GIS substations
  • Pooling substations
  • HVDC

Converter transformer foundation and firewall design

CalculationRelated service

Designs foundations, oil containment and fire separation walls for converter transformers from vendor loads and project criteria.

Typical inputs
Transformer weight and outline, soil report, fire criteria
Typical outputs
Foundation and firewall design and drawings
  • HVDC

RCC and Structural Design of Plant and BESS Site Structures

CalculationRelated service

Designs the foundations and supports for inverters, inverter-duty transformers, PCS units, battery containers and the turbine interface from vendor loads and soil data, where in scope.

Typical inputs
Vendor loads and fixings, soil data, layout
Typical outputs
Foundation and support design calculations
  • Solar, wind & hybrid
  • BESS

Civil & Structural Engineering Drawings

15 items

Switchyard Gantry / Steel Structure GA Drawings

DrawingRelated service

Shows the geometry, member layout and levels of each gantry and tower type, with positions of conductor attachments and equipment, as the reference for detailing.

Typical inputs
Structure design results, electrical GA
Typical outputs
Structure general arrangement drawings
  • AIS/GIS substations
  • Pooling substations
  • HVDC

Equipment support structure drawings

DrawingRelated service

Shows member sizes, connections, base plates and anchor bolt layouts for each support type, coordinated with the foundation drawings and vendor interface dimensions.

Typical inputs
Support structure design, vendor mounting details
Typical outputs
Support structure drawings
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS

Steel Structure Member, Connection, Fabrication and Erection Drawings

DrawingRelated service

Where assigned, gives piece-level detailing, marks and connection details so fabrication and erection can proceed from a controlled drawing set.

Typical inputs
Approved structure design, connection forces
Typical outputs
Fabrication and detailing drawings
  • AIS/GIS substations
  • Pooling substations
  • HVDC

Transformer and reactor foundation and oil pit drawings

DrawingRelated service

Shows foundation outlines, rail or plinth details, oil pit and drain connections, with anchor positions taken from the approved equipment drawing.

Typical inputs
Foundation design, oil volume, drainage scheme
Typical outputs
Foundation, oil pit and gravel layer drawings
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • HVDC

Equipment foundation drawings

DrawingRelated service

Shows plan, section and reinforcement of each equipment foundation with anchor bolt layout and levels, referenced to the foundation layout drawing.

Typical inputs
Foundation design, layout, anchor details
Typical outputs
Equipment foundation drawings
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS

Foundation layout drawing

DrawingRelated service

Places every foundation on the yard plan with centre-line coordinates and levels, tied to the general arrangement so that setting-out is unambiguous.

Typical inputs
Electrical GA, foundation designs
Typical outputs
Coordinated foundation layout with centre-lines
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS

Control Room / MCR Building Architectural and Structural GA Drawings

DrawingRelated service

Shows room layout, openings, cable entries and structural arrangement of the control and relay building, coordinated with panel and cable layouts.

Typical inputs
Building design, architectural requirements
Typical outputs
Building general arrangement drawings
  • AIS/GIS substations
  • Pooling substations
  • BESS

GIS Hall Architectural / Structural GA and RCC Details

DrawingRelated service

Shows slab loads, embedded items, openings, crane and maintenance provisions needed by the GIS supplier, as an interface between building design and equipment drawings.

Typical inputs
GIS supplier loads, crane data, openings
Typical outputs
GIS building interface drawings
  • AIS/GIS substations
  • Pooling substations

Cable Trench and Duct Bank Drawings

DrawingRelated service

Shows trench sections, covers, drainage and crossing details, together with penetrations to buildings, coordinated with the cable routing layout.

Typical inputs
Cable routes, tray sizes, crossing loads
Typical outputs
Trench design and drawings
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Road, Drainage and Grading Drawings

DrawingRelated service

Shows internal roads, drains and outfall arrangement with levels and slopes, designed to convey the specified runoff while keeping equipment access clear.

Typical inputs
Site levels, rainfall data, layout
Typical outputs
Road, drainage and stormwater layout
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Site grading and earthwork layout

DrawingRelated service

Shows finished levels, cut and fill areas and slopes for the yard and access roads, based on survey and geotechnical data provided for the site.

Typical inputs
Survey levels, layout, drainage needs
Typical outputs
Grading and earthwork layout with volumes
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Fence and boundary wall drawings

DrawingRelated service

Shows fence or wall alignment, foundations and gates, with details agreed with the client and cross-checked against earthing of the fence.

Typical inputs
Boundary survey, security requirements
Typical outputs
Fence and boundary wall drawings
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

RCC reinforcement drawings

DrawingRelated service

Shows bar sizes, spacing, cover and lap details for each concrete element, derived from the design calculation and ready for scheduling.

Typical inputs
Approved RCC designs
Typical outputs
Reinforcement drawings
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Inverter and transformer skid foundations

DrawingRelated service

Foundations and plinths for inverter stations, transformers and associated equipment, drawn from vendor loads and soil data.

Typical inputs
Vendor weights and footprints, soil report
Typical outputs
Foundation design and drawings
  • Solar, wind & hybrid
  • BESS

BESS container and PCS foundations

DrawingRelated service

Foundations, plinths and cable entries for containers, PCS skids and transformers, drawn from vendor loads and soil data.

Typical inputs
Vendor loads and fixing details, soil report
Typical outputs
Foundation design and drawings
  • BESS

Civil Schedules, Quantities & Documents

5 items

BOQ, BBS, material take-off and MDL are schedules and documents, not drawings or calculations.

Bar Bending Schedule (BBS)

Schedule / documentRelated service

Where scoped, lists every reinforcing bar by mark, diameter, shape and length so that cutting, bending and quantity records follow the drawings.

Typical inputs
Reinforcement drawings
Typical outputs
Bar bending schedule
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS
  • Transmission lines

Civil BOQ and Material Take-off

Schedule / documentRelated service

Quantifies concrete, reinforcement, steel and earthwork from the drawings, with assumptions stated, to support procurement and progress measurement.

Typical inputs
Approved civil drawings
Typical outputs
Civil quantities and BOQ
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Structural calculation report

Schedule / documentRelated service

Compiles the design basis, load cases, analysis results and member checks for a structure into a single reviewable report with clear references to input documents.

Typical inputs
Design inputs, criteria, analysis results
Typical outputs
Structural calculation report for review
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Civil Master Drawing / Deliverable List (MDL)

Schedule / documentRelated service

Lists each civil drawing and calculation with number, revision and planned submission, so reviewers and the project team can track design progress.

Typical inputs
Contract scope and client numbering
Typical outputs
Civil MDL
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Interface and input register

Schedule / documentRelated service

Records the inputs required from geotechnical, electrical and vendor sources, their status and the dates they are needed, so design is not started on unconfirmed data.

Typical inputs
Geotechnical, electrical and vendor inputs
Typical outputs
Register of inputs, status and need dates
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS

Transmission Line Design Calculations

6 items

Line calculations are kept apart from substation busbar calculations.

How it is prepared, for example: Tower design. Loading criteria and conductor data become load trees, the tower is analysed and its members and connections sized, then drawn with attachments and clearances, and foundation reactions pass to the foundation design.

Tower Loading Trees and Load Cases

CalculationRelated service

Sets out wire, wind and construction loads for each tower type and loading condition, including broken-wire cases where specified, as input to member design.

Typical inputs
Wind zone, conductor and earth wire data, reliability criteria
Typical outputs
Load trees and load case schedule
  • Transmission lines

Tower structural analysis and member sizing

CalculationRelated service

Analyses the tower under the specified load cases and sizes legs, bracing and cross-arm members, with utilisation checks recorded for each member group.

Typical inputs
Load trees, tower geometry, steel grades
Typical outputs
Member sizes with strength and deflection checks
  • Transmission lines

Bolted connection design

CalculationRelated service

Checks bolts, gussets and splices for the member forces from analysis, and records edge distances, bolt grades and any special connection arrangements.

Typical inputs
Member forces, bolt grades
Typical outputs
Bolted connection design
  • Transmission lines

Transmission Line Sag–Tension & Stringing Charts

CalculationRelated service

Overhead Transmission Line Conductor Sag–Tension Analysis & Stringing Chart Preparation: sag and tension of phase conductor and earth wire/OPGW under temperature and weather cases, with initial, final and creep conditions as applicable, converted to stringing charts. A line calculation, not the substation flexible busbar calculation.

Typical inputs
Conductor and earth-wire/OPGW data, ruling spans, temperature and wind cases, creep basis
Typical outputs
Sag–tension tables and stringing charts
  • Transmission lines

Tower foundation design

CalculationRelated service

Designs pad-and-chimney, pile or other approved foundation types for the soil classes in the project, using reactions from tower analysis and soil data.

Typical inputs
Tower reactions, soil classes, geotechnical data
Typical outputs
Foundation design by soil class
  • Transmission lines

Conductor, Earth-wire & OPGW Selection, Losses and Corona Assessment

CalculationRelated service

Compares conductor options for current capacity, losses, corona and radio interference, recording the criteria and data used.

Typical inputs
Power transfer, voltage, climatic data, conductor catalogue
Typical outputs
Conductor recommendation with loss and corona results
  • Transmission lines

Transmission Line Drawings

9 items

Single and double circuit tower geometry

DrawingRelated service

Defines the outline, panel layout, cross-arm geometry and attachment points of each tower type for the voltage, circuit arrangement and clearance criteria of the project.

Typical inputs
Voltage, circuits, clearances, conductor configuration
Typical outputs
SC or DC tower geometry and outline
  • Transmission lines

Body and leg extension design

DrawingRelated service

Shows the extension arrangement, geometry and member changes needed to adapt a tower type to ground conditions, as allowed by the project schedule.

Typical inputs
Terrain profile, tower design
Typical outputs
Body and leg extension design
  • Transmission lines

Tower assembly and fabrication drawings

DrawingRelated service

Where assigned, gives member marks, assembly sequence and bolt lists so fabrication and erection can follow controlled drawings.

Typical inputs
Approved design and connections
Typical outputs
Assembly and fabrication drawings
  • Transmission lines

Insulator string and attachment arrangement

DrawingRelated service

Shows insulator string types, hardware and attachment points on the cross-arms, aligned with the electrical clearance and swing criteria.

Typical inputs
Insulator and hardware data, clearances
Typical outputs
String and attachment arrangement
  • Transmission lines

Clearance diagram

DrawingRelated service

Shows electrical clearances to tower steelwork under still and swung conditions for each tower type, according to the clearance criteria specified.

Typical inputs
Electrical clearances, swing angles, tower outline
Typical outputs
Clearance diagram
  • Transmission lines

Route Plan & Profile and Tower Spotting

DrawingRelated service

Where in scope, positions towers on a supplied route profile against ground clearance and crossing requirements. Survey data come from the client or a surveyor.

Typical inputs
Survey profile, tower types, clearance criteria
Typical outputs
Plan and profile with tower positions
  • Transmission lines

OPGW and earth wire interface details

DrawingRelated service

Shows attachment, clamp and earthing arrangements for earth wire or OPGW at tower and termination points, where expressly included in scope.

Typical inputs
OPGW or earth wire data, tower peak details
Typical outputs
Interface and fitting details
  • Transmission lines

Tower earthing arrangement

DrawingRelated service

Shows footing earthing or counterpoise connections to each tower type, where in scope, with details coordinated with foundation drawings.

Typical inputs
Soil resistivity, tower footing data
Typical outputs
Tower earthing arrangement
  • Transmission lines

Tower RCC foundation drawings

DrawingRelated service

Shows geometry, stub setting, reinforcement and levels of each foundation type, so it can be scheduled and constructed from controlled details.

Typical inputs
Foundation design, stub details
Typical outputs
RCC foundation drawings
  • Transmission lines

Transmission Line Schedules & Documents

5 items

Tower Schedule and Tower Families (Type A/B/C/D as per project specification)

Schedule / documentRelated service

Lists the tower family as defined by the project's own schedule, with the applicable line angle and span limits stated by the client rather than assumed.

Typical inputs
Route angles, span ranges, client tower family
Typical outputs
Tower type schedule as defined by the project
  • Transmission lines

Tower weight and material list

Schedule / documentRelated service

Summarises member and bolt weights for each tower type and extension, giving a basis for fabrication planning and estimate checking.

Typical inputs
Approved tower design
Typical outputs
Weight and material list
  • Transmission lines

Foundation reinforcement schedule and BOQ

Schedule / documentRelated service

Lists bar sizes, lengths and concrete volumes for each foundation type, giving a consistent basis for quantity records and estimates.

Typical inputs
Foundation drawings
Typical outputs
Reinforcement schedule and BOQ
  • Transmission lines

Tower design basis and criteria report

Schedule / documentRelated service

Records conductor data, loading and reliability criteria, tower family and clearance criteria used for design, with sources identified for review.

Typical inputs
Specification, conductor data, loading criteria
Typical outputs
Tower design basis report
  • Transmission lines

Route alignment and survey review

Schedule / documentRelated service

Where in scope, reviews route options and survey data for angle points, crossings and constraints before tower spotting.

Typical inputs
Route options, survey data, crossing requirements
Typical outputs
Route review with recommended alignment
  • Transmission lines

Pre-Bid Drawings

2 items
How it is prepared, for example: Preliminary quantities. The tender SLD and layout are read, assumptions are stated, quantities are taken off for equipment, steel, cable and civil items, and a basis of estimate records what each number covers.

Conceptual single-line diagram

DrawingRelated service

Develops an initial single-line arrangement from tender requirements for use in bid planning. It carries stated assumptions and is not an approved design.

Typical inputs
Tender SLD, bay requirements
Typical outputs
Conceptual SLD with stated assumptions
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS

Initial layout and footprint concept

DrawingRelated service

Gives an early arrangement of bays, equipment and buildings with approximate area and clearances, to test feasibility against the offered site area.

Typical inputs
Plot data, bay count, tender GA
Typical outputs
Initial layout and footprint
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS

Pre-Bid Schedules & Documents

11 items

Tender scope matrix

Schedule / documentRelated service

Breaks the tender documents into scope packages, interfaces and obligations, and notes where the tender is unclear so queries can be raised early.

Typical inputs
RFP, specification, tender drawings
Typical outputs
Scope matrix by package and party
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS
  • Transmission lines

Technical requirement and exception matrix

Schedule / documentRelated service

Lists each technical requirement against the proposed approach and highlights exceptions or clarifications needed, as a basis for the bid compliance statement.

Typical inputs
Specification clauses
Typical outputs
Requirement and exception matrix
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS
  • Transmission lines

Tender query and clarification register

Schedule / documentRelated service

Collects questions raised during bid preparation with responses received, giving a traceable record of how ambiguities were handled.

Typical inputs
Tender documents, open points
Typical outputs
Query and clarification register
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS
  • Transmission lines

Preliminary quantities and BOQ

Schedule / documentRelated service

Takes off principal quantities from the tender drawings and stated assumptions, to support the EPC estimate. It is not a measured detail quantity.

Typical inputs
Conceptual SLD and layout, tender BOQ format
Typical outputs
Preliminary quantities and BOQ
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS
  • Transmission lines

Bid-stage GTP technical review

Schedule / documentRelated service

Reviews supplier guaranteed technical particulars submitted for the bid against the tender specification and notes compliance, deviations and clarifications needed.

Typical inputs
Bid GTPs, specification
Typical outputs
Bid-stage GTP review
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS
  • Transmission lines

Vendor offer comparison

Schedule / documentRelated service

Compares technical offers on a consistent basis, noting differences in scope, ratings and exclusions so the EPC team can evaluate them like for like.

Typical inputs
Supplier offers, specification
Typical outputs
Offer comparison with deviations
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS
  • Transmission lines

Bid engineering plan

Schedule / documentRelated service

Outlines the deliverables, staging and information needed in the bid, so the engineering effort and its dependencies are visible to the bid team.

Typical inputs
Tender schedule, scope
Typical outputs
Bid engineering plan
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS
  • Transmission lines

Basis of estimate

Schedule / documentRelated service

States the assumptions, inputs and exclusions behind the quantity take-off, so cost estimators understand what the quantities do and do not represent.

Typical inputs
Quantities, assumptions, sources
Typical outputs
Basis of estimate
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS
  • Transmission lines

Priced-item scope assumptions note

Schedule / documentRelated service

Clarifies what each priced item is intended to cover, based on tender wording, so scope gaps can be seen before the bid is submitted.

Typical inputs
Tender wording, priced items
Typical outputs
Scope assumptions note
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS
  • Transmission lines

Technical compliance and deviation statement

Schedule / documentRelated service

Presents the technical response to the tender, listing compliance, deviations and clarifications in the format requested by the tender.

Typical inputs
Specification, offered design
Typical outputs
Compliance and deviation statement
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS
  • Transmission lines

Risk and exclusions note

Schedule / documentRelated service

Records technical risks, open information and exclusions recognised during bid preparation, so they can be priced or clarified deliberately.

Typical inputs
Tender review, open points
Typical outputs
Risk and exclusions note
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS
  • Transmission lines

Technical Review & Project Support

7 items

Review sheets, witness and audit reports, and site query responses, as contracted.

How it is prepared, for example: Vendor drawing review. Vendor GTP and drawings are checked against the specification, deviations are listed, and comments are tracked to closure in the comment resolution sheet.

GTP and vendor drawing review sheet

Schedule / documentRelated service

Records a point-by-point review of manufacturer guaranteed technical particulars and drawings against the specification, listing agreed items, deviations and information still required.

Typical inputs
Specification, GTP, vendor drawings
Typical outputs
Review sheet with comments and status
  • AIS/GIS substations
  • Pooling substations
  • Solar, wind & hybrid
  • BESS
  • Transmission lines

BESS safety and fire-protection compliance review

Schedule / documentRelated service

Reviews OEM and design documents against the project’s safety and fire-protection requirements and records open points. Battery cell and BMS details stay with the OEM, and certified fire studies and statutory approvals stay with qualified specialists and the authorities.

Typical inputs
OEM safety documents, applicable codes and requirements
Typical outputs
Review sheet with compliance status and open points
  • BESS

Commissioning and performance test procedure review

Schedule / documentRelated service

Where contracted, reviews test procedures against the specification so that acceptance tests measure what the contract requires.

Typical inputs
Specification, OEM test procedures
Typical outputs
Comments and recommended acceptance criteria
  • BESS
  • Solar, wind & hybrid
  • Pooling substations
  • AIS/GIS substations

HVDC equipment specification and technical review

Schedule / documentRelated service

Prepares or reviews specifications and supplier documents for HVDC station equipment, as contracted, against the project requirements.

Typical inputs
Project requirements, supplier documents
Typical outputs
Specification or review sheet
  • HVDC

Factory acceptance test witness report

Schedule / documentRelated service

Where contracted, records the type and routine tests witnessed at the factory and compares results with the approved data.

Typical inputs
Approved test plan, GTP, test results
Typical outputs
Witness report with observations
  • AIS/GIS substations
  • HVDC
  • BESS
  • Solar, wind & hybrid
  • Pooling substations
  • Transmission lines

Vendor qualification and supplier audit report

Schedule / documentRelated service

Where contracted, assesses a supplier’s capability, experience and quality system against the project’s qualification requirements.

Typical inputs
Qualification criteria, supplier documents, audit visit
Typical outputs
Audit report with findings
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS
  • Transmission lines

Site technical query response

Schedule / documentRelated service

Answers a site or vendor query against the approved design basis and records any resulting drawing change.

Typical inputs
Site query, approved drawings and calculations
Typical outputs
Response note and revised drawing where needed
  • AIS/GIS substations
  • Solar, wind & hybrid
  • Pooling substations
  • BESS
  • Transmission lines

How to read this library. Listing an item does not mean CoreGrid has prepared it on a particular project or that it forms part of every contract. Actual deliverables are those in the client’s specification and MDL. We do not publish client drawings or calculations; all descriptions are generic.

Send your MDL for a deliverables review

Share the master deliverable list or a draft scope. We will map it against what we can prepare and note any inputs missing from the list.

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