Grid Frequency Drop Calculator & Sudden Trip Simulator
Wired White v1 Simulate a single-area grid trip with synchronous inertia, GFM droop and virtual inertia, GFL fast response and UFLS. Compare RoCoF and nadir as synchronous share falls.
Power systems and protection
Grids, lines, transformers and protection: relay coordination curves, CT saturation, transformer hot spot and loss of life, conductor ratings, line parameters. Each calc names the method, the standard and edition it follows and its limits; they are for screening and learning, and a protection or grid study still needs a qualified engineer.
Wired White v1 
Conductor Ampacity Calculator: Ambient & Dynamic Line Rating
Wired White v1 Estimate overhead conductor ampacity, temperature after a current step, and thermal sag from ambient temperature, wind and sun. Includes ambient-only comparisons and an animated example day.
Transformer Hot Spot, Ageing and Harmonic Derating
Wired White v1 Model a 24-hour transformer load cycle, hot-spot temperature and insulation life use. Calculate harmonic loss factors and loss-based derating from a current spectrum.
CT Saturation Calculator: DC Offset, Remanence & Time
Wired White v1 Estimate CT knee crossing and fault-current distortion with DC offset, burden and remanence. Animate core flux and compare the relay current with a one-cycle Fourier estimate.
Line Impedance Calculator: GMD, GMR and Carson’s Equations
Wired White v1 Calculate overhead-line R, L and C per km from conductor positions, bundles and soil resistivity. Inspect phase and sequence impedance matrices, with Carson earth return and neutral reduction.
Overcurrent Relay Coordination Calculator: IEEE & IEC TCC
Wired White v1 Plot IEEE and IEC relay curves with CT ratios, instantaneous trips and user fuse points. Screen grading margins and find a candidate upstream time dial and pickup interval.
