Recent additions to the Library — new calculators, the typeset audit report, and single-line diagrams. Newest first.
A two-winding distribution and power transformer, defined once and read six ways: full-load current, fault contribution and earth fault, voltage regulation, losses and efficiency with GEMS MEPS checking, off-circuit taps, and a C57.109 / C57.12.59 through-fault damage curve that drops onto the coordination chart. Shipped with a worked example and a note on the 433 / 415 / 400 V question.
IEEE C57 · AS 60076 · GEMS · IEC 60909Static UPS sizing straight from a load schedule — apparent and real power, rectifier and inverter rating, and battery autonomy against a runtime target, with the assumptions each figure rests on disclosed in the report.
IEEE 1100 · load-schedule methodA single-line diagram viewer opened to the public at /sld/, alongside a full editor inside the platform with server-side persistence — draw the network the calculators size, and keep it under a document number.
platform · draft revisionsEvery calculator's PDF was rebuilt as a single-typeface, black-and-white Cahier sheet — one monospace family throughout, a server-verified stamp, and a document-control band — so an exported result reads as a record, not a screenshot.
print-truth · single typefaceTime-current grading against a vendor device library: plot relays, breakers and fuses on one chart, read each device's trip time at any fault current, and check the grading margin across the whole fault range rather than at a single point.
IEC 60255 · IEEE C37.112Detuned capacitor-bank correction for medium-voltage networks — required kVAr to a target power factor, detuning reactor selection, and the resonance check that keeps the bank clear of the dominant harmonic.
AS 4122 · IEC 61642The cable-sizing engine was rebuilt table-true to AS/NZS 3008.1.1:2017 — current-capacity, voltage-drop and short-circuit selection read straight from the standard's tables, with the earth-fault-loop check to AS/NZS 3000, and every table reference cited on the result.
AS/NZS 3008.1.1 · AS/NZS 3000Dates are when each addition went live on the Library. Earlier calculators — voltage drop, maximum demand, motor starting, earthing grid — predate this log. More in preparation.