• May include: A digital 3-Phase Panel Load Schedule and Phase Balance spreadsheet interface. It displays technical data, circuit descriptions, load types, and a summary window with suggested moves to balance electrical phases.
  • May include: A digital panel schedule interface titled One row per circuit by Tobulab. The software displays electrical data including load types, phases, power factors, demand factors, and breaker sizes for ten circuits in a table format.
  • May include: A technical document titled Suggested moves to balance the phases from tobulab. It displays a table with three circuit moves, including an EV charger, pantry sockets, and signage, showing kVA values, phase shifts, and final imbalance percentages.
  • May include: A digital interface titled Main breaker and feeder by tobu/lab displaying electrical data for DB-1 Office. The table shows per-phase connected load, demand load, and demand current for L1, L2, and L3, plus phase imbalance and neutral current.
  • May include: A digital interface titled Transparent logic by tobu/lab displaying a balance sheet table. The table tracks electrical load data across three phases, L1, L2, and L3, through three sequential moves, showing kVA values and calculated scores.
  • May include: A digital product listing for a 3-phase panel load schedule Excel file. The text includes sections for Start Here, Panel Schedule, Summary, Balance, and Lists, along with a preview of the spreadsheet interface showing a colour-coded key.
  • May include: A digital 3-Phase Panel Load Schedule and Phase Balance spreadsheet interface. It displays technical data, circuit descriptions, load types, and a summary window with suggested moves to balance electrical phases.
  • Product video
  • May include: A digital panel schedule interface titled One row per circuit by Tobulab. The software displays electrical data including load types, phases, power factors, demand factors, and breaker sizes for ten circuits in a table format.
  • May include: A technical document titled Suggested moves to balance the phases from tobulab. It displays a table with three circuit moves, including an EV charger, pantry sockets, and signage, showing kVA values, phase shifts, and final imbalance percentages.
  • May include: A digital interface titled Main breaker and feeder by tobu/lab displaying electrical data for DB-1 Office. The table shows per-phase connected load, demand load, and demand current for L1, L2, and L3, plus phase imbalance and neutral current.
  • May include: A digital interface titled Transparent logic by tobu/lab displaying a balance sheet table. The table tracks electrical load data across three phases, L1, L2, and L3, through three sequential moves, showing kVA values and calculated scores.
  • May include: A digital product listing for a 3-phase panel load schedule Excel file. The text includes sections for Start Here, Panel Schedule, Summary, Balance, and Lists, along with a preview of the spreadsheet interface showing a colour-coded key.
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3 Phase Panel Schedule Excel, Load Schedule and Phase Balancing Spreadsheet

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  • Digital download
  • Digital file type(s): 1 ZIP
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May include: A digital 3-Phase Panel Load Schedule and Phase Balance spreadsheet interface. It displays technical data, circuit descriptions, load types, and a summary window with suggested moves to balance electrical phases.

Build the load schedule of a 3-phase distribution board and balance its phases, with suggested circuit moves worked out for you.

WHAT IT DOES
- Up to 60 outgoing circuits: single-phase on L1, L2 or L3, or 3-phase (split equally)
- kW, power factor and demand factor per circuit; line current and next standard breaker per row
- Per-phase connected and demand load, demand current, phase imbalance % and neutral current
- Main breaker suggestion with spare capacity, and a feeder cable size (Cu or Al, PVC or XLPE; current ratings calculated with the IEC 60287 thermal method with safe-side margins, verify against your local wiring rules)
- SUGGESTED MOVES: up to three circuit moves from the most loaded phase to the least loaded one, each kept only if it lowers the imbalance. The example board goes from 54 % to 2 % imbalance in three moves.
- Shows the phase currents and main breaker after the moves
- No macros: a Balance sheet shows every step behind each suggestion, so you can check it or explain it to a client

WHAT'S INSIDE (1 Excel file + a printable PDF of the example)
Start Here, Panel Schedule, Summary, Balance, Lists (breaker ratings you can edit). Ships with a worked example: a 21-circuit office board at 400 V.

WORKS WITH
A script opened this file in Microsoft Excel for Mac 16.114.3 and ran a full recalculation. Every cell matched the values stored in the file, with no error cells. That test did not type new data. Excel for Windows, older Excel versions and Google Sheets have not been tried. The formula tests ran in LibreOffice. Any 3-phase 4-wire system (230/400 V, 240/415 V, 220/380 V, 277/480 V ...). No macros.

GOOD TO KNOW
- Digital download. Nothing is shipped.
- Demand factors and diversity are your engineering judgement; the workbook does not impose any.
- The neutral current assumes similar power factors and no harmonics.
- Estimation aid: check against the rules where you work and have a qualified engineer review the design. Not affiliated with or endorsed by IEC.

HOW THIS WAS MADE
The workbook was designed and built with the help of AI tools. Scripts recalculated the file in LibreOffice and compared it with a separate Python calculation of the same method, across 7 test boards including edge cases.

For your own use and your company's projects. Please do not resell or share the file.

  • Designed by
    tobulab
  • Item type
    Digital download
  • Digital file type(s)
    1 ZIP
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Listed on 25 Oct, 2026
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