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Engineering Hub: System Design, Drawings & BOQ

Enter the duty, or describe any requirement and attach the drawing. AutoCAD, PDF, a spreadsheet or a photograph is accepted. The desk sizes what it can from NBC 2016 Part 4, IS 15105, IS 3844, IS 13039, TAC, NFPA 13, NFPA 20, IS 732, IS 3043, IS 2189, ISHRAE and ASHRAE 62.1, draws the P&ID or single-line diagram, the scaled plan, both elevations, section A-A and the isometric, and writes the bill. A PEB shed takes length, width, eave, bay, slope, basic wind speed, crane and cladding, and draws the framing plan, the anchor bolt plan, both elevations, section A-A and a rotatable 3D model. Fire suppression and fire detection sit under Fire protection, not as a separate project type. A mark you add on the sheet is saved with the download. A licensed engineer still stamps the issue.

Choose project type

Switchyard is selected. The subcategories for this type are under this list. The drawing and the bill further down are the existing type page. A catalogue price is used when it matches. Otherwise a published Indian rate plus 20% is shown with its source. Erection is 10% of that system's materials, testing 2%, and transport 3%.

Subcategories

Each subcategory has its own design basis, calculation, drawings, bill and quotation.

Switchyard

Incoming yard and the transformer. The single-line is on the drawing.

AutoCAD DWG or DXF, PDF, or any other file.

Factoryclix

Rev A

SHEET 1 OF 7

11 kV gantryLALightning arrestor1 set11 kVISOLIsolators2 set11 kVCTCurrent transformer1 setVCBVacuum breaker1 no.TR-1Transformer1 no.400 kVAEpipe earth pit2 no.400 kVA · 556 AFactoryclix / Proactive Industrial Pvt LtdSwitchyardDRAWINGSingle line diagramSHEET 1 OF 7SCALE NTSREV AEnquiry2,000 m² per floor · 2 floors · eave 8 mEnquiry drawing. A licensed engineer must verify and stamp before use.Design basis Yard 11 kV · 1 × 400 kVA · Demand 400 kVA
  • 2,000 m² is the area of one floor, 2 floors, 8 m height. Sprinkler heads, sprinkler branch pipe and smoke detectors are that floor counted again on every floor. The sprinkler pump stays on the remote design area.
  • Prices on the quotation are ex-GST. A catalogue match is used first. Where the catalogue has no price, a published Indian rate plus 20% is used and the source is on the line. GST at 18% is added on every material line. A price the source already quoted including GST is converted to the ex-GST rate and 18% is shown separately. Erection and installation labour is 10% of that system's material subtotal, testing and commissioning 2%, and transport 3%. GST 18% is added on those allowances.
  • Standards cited on this desk: NBC 2016 Part 4, IS 15105, IS 3844, IS 13039, TAC, NFPA 13, NFPA 20, IS 732, IS 3043, IS 2189, ISHRAE and ASHRAE 62.1.

Calculation

PartFormulaWorkingResultStandard
YardNext standard transformer at or above the demand. 33 kV from 1,600 kVA, otherwise 11 kV400 kVA demand, 556 A at 415 V. This is the yard, not the fire pump.11 kV · 1 × 400 kVAIEC 62271 / IS 1180
DemandkVA = (kW × diversity) / power factor100 W/m² × 2,000 m² per floor × 2 floors = 400.0 kW. Diversity 0.8, pf 0.8.400 kVANBC Part 8 / IS 732
CableThe larger of current-carrying capacity and voltage drop556 A over 50 m. Allowable drop 5.0%. 2 aluminium XLPE runs of 185 mm², each carrying 278 A. Reactance 0.08 ohm/km.2 × 185 mm² · 1.21% dropIS 3961 / IS 7098 / IS 732

Design basis

PartSpecificationStandard
isolator 1111 kV isolators. 1 bay from 400 kVA, at least a line bay and a transformer bay.IEC 62271
vacuum circuit breaker 1111 kV vacuum breaker, one per bay.IEC 62271
lightning arrestor 11One set per bay on the incomer.IEC 60099
current transformer 11Metering CTs, one set per bay.IS 16227
distribution transformer 400400 kVA from the demand equation. 1 × 400 kVA is the next standard rating at or above that demand.IS 1180
EarthingPipe or plate earth pits, not an ESE lightning set. Resistance is proved on site. Not added again when the electrical bill already has the pits. Price on request if the catalogue has no pipe-earth pit.IS 3043
HT cableTransformer tail. One catalogue length of 100 m, 95 mm², 11 kV. The yard drawing fixes the real run.IS 7098 Part 2
Cable glandGlands on the CT, breaker and transformer tails. 25 mm is the published gland.IS 12943
Cable lug70 mm² lugs for those tails. 70 mm² is the termination allowance.IS 8309
ClampClamps on the earth risers and the cable supports. The published rate is an 80 mm U clamp.Site practice
SignDanger boards on the fence. The published board is 11000 V, 200×250 mm, IS 2551, including when this yard is 11 kV.CEA
TestingSwitchyard testing and commissioning. 2% of this system's material subtotal, ex-GST. GST 18% is added on this allowance.Site practice
ErectionSwitchyard erection and installation labour. 10% of this system's material subtotal, ex-GST. GST 18% is added on this allowance.Site practice
TransportSwitchyard transport and freight. 3% of this system's material subtotal, ex-GST. GST 18% is added on this allowance.Site practice

Get this designed & installed by us

Statutory

  • This is an enquiry BOQ, not a sanctioned design. A licensed consultant stamps the drawing before construction.
  • The supply authority clears the yard drawing. A licensed electrical engineer signs it. CEA safety regulations and the state electrical inspector apply to the high-voltage installation.

Switchyard BOQ

Proactive Industrial Private LimitedGSTIN: 24AAQCP1475R1ZLRegistered office: C-119, Siddhivinayak Business Tower, Makarba, Sarkhej, Ahmedabad, Gujarat 380051Branch offices: Vadodara | Padal (Kheda) | Bharuch

Supply

  • isolator 11

    11 kV isolators. 1 bay from 400 kVA, at least a line bay and a transformer bay. · IEC 62271

    2 set × —

    GST —

    Amount —

  • vacuum circuit breaker 11

    11 kV vacuum breaker, one per bay. · IEC 62271

    1 no. × —

    GST —

    Amount —

  • lightning arrestor 11

    One set per bay on the incomer. · IEC 60099

    1 set × —

    GST —

    Amount —

  • current transformer 11

    Metering CTs, one set per bay. · IS 16227

    1 set × —

    GST —

    Amount —

  • distribution transformer 400

    400 kVA from the demand equation. 1 × 400 kVA is the next standard rating at or above that demand. · IS 1180

    1 no. × —

    GST —

    Amount —

  • pipe earth pit

    Pipe or plate earth pits, not an ESE lightning set. Resistance is proved on site. Not added again when the electrical bill already has the pits. Price on request if the catalogue has no pipe-earth pit. · IS 3043

    2 no. × —

    GST —

    Amount —

  • HT cable 95 sqmm 11 kV

    Transformer tail. One catalogue length of 100 m, 95 mm², 11 kV. The yard drawing fixes the real run. · IS 7098 Part 2

    1 length × —

    GST —

    Amount —

  • brass cable gland 25 mm

    Glands on the CT, breaker and transformer tails. 25 mm is the published gland. · IS 12943

    6 no. × —

    GST —

    Amount —

  • aluminium cable lug 70 sq mm

    70 mm² lugs for those tails. 70 mm² is the termination allowance. · IS 8309

    12 no. × —

    GST —

    Amount —

  • GI pipe clamp 80 mm

    Clamps on the earth risers and the cable supports. The published rate is an 80 mm U clamp. · Site practice

    12 no. × —

    GST —

    Amount —

  • switchyard danger sign

    Danger boards on the fence. The published board is 11000 V, 200×250 mm, IS 2551, including when this yard is 11 kV. · CEA

    4 no. × —

    GST —

    Amount —

  • transport to site

    Switchyard transport and freight. 3% of this system's material subtotal, ex-GST. GST 18% is added on this allowance. · Site practice

    1 lot × —

    GST —

    Amount —

Supply subtotal—

Installation

  • testing and commissioning

    Switchyard testing and commissioning. 2% of this system's material subtotal, ex-GST. GST 18% is added on this allowance. · Site practice

    1 lot × —

    GST —

    Amount —

  • erection and labour

    Switchyard erection and installation labour. 10% of this system's material subtotal, ex-GST. GST 18% is added on this allowance. · Site practice

    1 lot × —

    GST —

    Amount —

Installation subtotal—

GST —

Grand total —

Supply is the material and the transport. Installation is erection, testing and commissioning, and the other site services. Each section has its own ex-GST subtotal. GST and the grand total follow. A catalogue match is used when the catalogue has a price. Where it does not, the rate is a published Indian marketplace or maker price plus 20%, and the source is on the line. Every material rate is ex-GST, and GST at 18% is added on it. A published price that already included GST is converted to the ex-GST figure and 18% is shown separately. Erection and installation labour is 10% of that system's material subtotal, testing and commissioning 2%, and transport 3%, with GST at 18% on those allowances.

Freight

Ahmedabad to Vadodara · about 131 km · chargeable 150 kg

Freight ₹1,800 ex-GST · GST ₹324 · Payable ₹2,124

Road part-load from the pincode. Chargeable weight is the higher of actual kg and 300 kg per cubic metre. Confirm the truck before a PO.