Evgenii Buchinskii
Electrical power engineer · UAE and the wider Gulf region · LinkedInI design and review electrical power systems — substations, cable networks, protection and solar plants — and I build the calculators on this site for the work I do myself. Every engine here exists because I needed the calculation on a real project and wanted it referenced to the clause rather than to a spreadsheet somebody inherited.
What I work on
Day to day this is power engineering documentation: single-line diagrams, cable schedules and sizing, fault-level and protection studies, earthing and lightning protection, transformer and switchgear selection, photovoltaic and battery-storage plants, and the design review of other parties' documentation against the project specification and the applicable standards.
That review work is where most of the tools started. Checking somebody's cable schedule against IEC 60364-5-52 or a fault study against IEC 60909 by hand, on every revision, is exactly the kind of task that should be automated once and then validated properly — which is what this site is.
The calculations on this site
I write the engineering logic, extract the tabulated values from the standards, and pin each engine to a published case before it goes live. The validation page lists what every engine is compared against — 142 comparisons at the last count, from the IEEE 80 Annex B earthing example to the worked 400 V network of IEC TR 60909-4 clause 3.
The tools I have published so far:
- Short circuit, MV 1 to 33 kV and short circuit, LV up to 1 kV — IEC 60909
- Cable ampacity — IEC 60287, and LV cable sizing — IEC 60364-5-52
- Voltage drop — IEC 60364-5-52 and IEC 60502-2
- Substation grounding grid — IEEE Std 80, and lightning risk — IEC 62305-2
- Transformer sizing — IEC 60076, and CT verification — IEC 61869-2
- Motor sizing — IEC 60034, and reactive power compensation — IEC 60831
- PV string sizing — IEC 62548, and site design conditions — IEC 60721 and IEC 60826
The full list with what each one computes is on the calculators page.
Written work
The guides take one calculation end to end on project numbers rather than explaining a formula in the abstract — a fault level bus by bus through an 11/0,4 kV substation, cable ampacity in a trench as built rather than as tabulated, a feeder taken to its permitted voltage drop, why touch voltage and not resistance decides an earthing grid.
Corrections are welcome, and they land
If a result here disagrees with your calculation, tell me — with the clause you are using. Several engines carry changes that came from readers who did exactly that. The forum has a branch for each calculator, and my address is on every tool page: buchinskii.evg@gmail.com.
I am an engineer publishing engineering tools, not a certification body. Nothing on this site is approved by IEC or IEEE, and the responsibility for a design that uses these results stays with the engineer who signs it — mine included.