Voltbench — Lightning Risk Tool (interactive demo)

🧪 Illustrative demo. A fixed sample shows the flow — inputs here aren't editable. The real wizard runs the validated Ed. 3:2024 engine live, free. Create a free account →

1 · Environment

What lightning data do you have for the site? The wizard prefers N_SG from a lightning location system, then N_G from a flash-density map — or looks it up on a satellite map.

Strike-point density N_SG from an LLS (IEC 62858) Ground flash density N_G from a national map None — look it up on the satellite map (NASA LIS/OTD)

Ground flash density N_G (1/km²/yr) Factor k relating N_G to N_SG

→ N_SG = k · N_G = 8.0 /km²/yr will be used in the calculation (eq. A.1).

2 · Structure

Geometry and physical character. Like the real wizard, every option shows the coefficient it resolves to.

Length L (m) Width W (m) Height H (m)

Relative location (C_D) Construction material (P_S) Existing LPS (P_LPS) Tallest roof protrusion H_P (m)

3 · Power lines

Each connected service section is a card — flashes to and near it add S3/S4 risk. The real wizard takes any number of sections per service.

Power line 1

Routing (C_I) Line surroundings (C_E) Line type (C_T) Section length L_L (m) SPDs at the entrance (P_EB)

4 · Telecom lines

The short overhead telecom line out-injects the long buried power line here — C_I and C_T at work.

Telecom line 1

Routing (C_I) Line surroundings (C_E) Section length L_L (m) SPDs at the entrance (P_EB)

5 · Risk zones

Risk is computed and judged per zone (Ed. 3:2024). Zone templates prefill typical values in the real wizard.

6 · Results — risk R per zone

R > R_T · protection required

Zone	Risk R	vs R_T = 10⁻⁵	Verdict
Z1 — Entrance plaza	2.1×10⁻¹⁰	—	Pass
Z2 — Offices	3.8×10⁻⁵	×3.8	Exceeds
Z3 — Archive (governing)	3.6×10⁻⁴	×36	Exceeds

Component breakdown — governing zone (R = R_L1 + R_L2)

➜ Recommended: Class I LPS + SPDs LPL I at both line entrances → governing zone 5.5×10⁻⁶ ✓ — every zone below R_T. The full report prints the post-measure factor tables so the projection is checkable.

Run this on your structure — free

Figures are the validated engine's output for this sample building (IEC 62305-2 Ed. 3:2024) — shown here as a fixed walkthrough. Your structure gets its own live computation, with every step clause-referenced.

Want this on your real structures?

The wizard and on-screen verdict are free — create an account and assess your first structure now. The full clause-referenced report is a one-off purchase.

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