Question 1

Is ElecSimHub free, and do I need an account?

Accepted Answer

Yes — the simulator and the calculators are free and need no sign-up. The deliverables workspace is free to generate as well: the deliverable list is public, and email sign-in is required only to view and download the full package. Identity is cookie-based so a scheme stays in your browser until you export it or create a read-only share link.

Question 2

Does the site send my scheme anywhere without asking?

Accepted Answer

No. Opening any tool page sends zero calculation requests. A request goes to the engine only when you press Run, and a share request only when you press Share.

Question 3

Which standards do the studies follow?

Accepted Answer

Load flow is a real network solution (Y-bus Gaussian elimination or Newton-Raphson); short circuit follows IEC 60909 (three-phase, two-phase, two-phase-to-earth and single-phase-to-earth); harmonics are compared against IEEE 519, IEC 61000, GB/T 14549 and ER G5/5; protection curves follow IEC 60255-151; arc flash and person protection follow IEEE 1584 and IEC 60364-4-41; DC auxiliary-system short circuit follows IEC 61660-1, PV low-voltage ride-through follows GB/T 19964 and auto-reclosing follows GB/T 14285.

Question 4

Can I use the results directly for construction?

Accepted Answer

No. Results are scheme and feasibility level. They are intended for comparison, pre-sales engineering and quick verification, and must be reviewed by a responsible engineer before construction.

Question 5

Can I export a PDF?

Accepted Answer

There is no PDF export. A design package exports as a self-contained HTML design document, plus drawings as SVG or DXF R12 and tables as CSV; the whole set can be downloaded as one ZIP.

Question 6

Does it do transient or stability analysis?

Accepted Answer

Yes for device- and event-level transients, no for system-wide electromagnetic transient (EMT) studies — the engine works in three layers. (1) Steady state is the mainstay: real load flow, IEC 60909 short circuit, voltage drop, cable and equipment withstand checks, protection coordination, reactive compensation. (2) On top of that it solves device- and event-level transients: the series-reactor fault di/dt with core saturation — loop ODE L·di/dt = U_m·sin(ωt+θ) − R·i solved in closed form and cross-checked against a fixed-step RK4 integration on a λ–i magnetisation curve (this is the model behind the reactor simulation report we delivered); short-circuit DC-component decay i(t) = √2·I″k·[sin(ωt+φ) − e^(−t/τ)·sin φ] with τ = (X/R)/(2πf); converter and VFD average models (dq current loop plus DC-link power balance, RK4-integrated — an averaged model, explicitly not switching-level; drive/VFD harmonics and cable overvoltage are engineering estimates rather than a PWM-transient simulation); auto-reclosing (/reclose) and bus transfer, each checked as a sequence of real load-flow / short-circuit operating stages; and inrush, PV low-voltage ride-through and island protection settings checked against the standard or typical-curve envelope. (3) Deliberately not done: full system-wide EMT phase-by-phase simulation (PSCAD/EMTP class — there is no EMT solver), the full electromechanical generator swing / rotor-angle stability process, numeric waveforms for switching or lightning overvoltages (only the standard impulse parameters, e.g. LI 105 kV), and seconds-to-minutes large-scale phase-by-phase time-domain simulation. Voltage stability is offered as a static margin instead: continuation power flow gives the P–V nose curve and the critical point (/voltage-stability). To be precise: the inrush and island-protection checks are engineering envelopes rather than ODE solutions, and island frequency is a static offset estimate with no frequency-trajectory simulation.

Question 7

Where do equipment data and prices come from?

Accepted Answer

Ratings come from the equipment catalogue and are treated as indicative; the bill of materials carries an estimated equipment price plus an allowance for installation and commissioning. A formal quotation is issued by the manufacturer after review.

Question 8

Can I share a scheme with a client or a colleague?

Accepted Answer

Yes. Press Share to create a signed, read-only link that renders the saved scheme without sign-in. The client sees the summary and can open the full design document; your editable canvas is not exposed.

Question 9

What languages are supported?

Accepted Answer

The interface supports 11 languages — switch with ?lang=ar / en / es / fr / id / pt / ru / th / tr / vi / zh, and on a first visit the site follows your browser language automatically. EN and Chinese are the fully maintained pair; the other nine are machine translations of the dictionary and currently cover part of it, falling back to English where a key has not been translated yet.

Question 10

How do I get a formal quotation?

Accepted Answer

Open the contact page and send the scheme to an engineer, or use the review button inside the report, drawings and deliverables pages. The scheme link travels with the enquiry so the reply can quote the exact configuration.

Question 11

Which analysis pages were added most recently?

Accepted Answer

Recent additions, all wired to real engine modules: auto-reclosing (/reclose — one line fault split into fault → protection clearing → reclosure, with branch overload and bus-voltage checks on both the transient and the permanent-fault branch); voltage stability (/voltage-stability — continuation power flow giving the P–V nose curve, the critical point λmax / vCritPu / weakest bus and a per-bus margin); protection setting and sequence check (/protection-tuning — overcurrent settings Ir / Isd / Ii re-checked by the engine itself, sequence-component sensitivity I2> / I0> and zone-selective interlocking); and DC short circuit (/dc-shortcircuit — IEC 61660-1, reporting the peak ip, the quasi-steady Ik, the ratio κ = ip/Ik, the loop time constant τ and the DC short-circuit power for every fault point).

Question 12

I am not familiar with the engineering terms — is there a glossary?

Accepted Answer

Yes, in two places. The Glossary page (/tech-hub/glossary) defines the engineering terms used across the tools — short circuit, equipment duty, power quality, stability, arc flash, generation and microgrid — each with its unit and with why it matters for sizing or for a quotation. Inside the tools, the same definition appears as a small “?” next to the term: hover or tap it and it opens in place, so you never have to leave the page you are working on.

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