Engineering Tools
Electrical design tools, built for engineers.
A growing suite of free tools to support your electrical engineering work — from quick sanity checks to detailed calculations.
TEC Register
NESO · GB Grid Connections · Live Data
Browse every generation and storage project holding a GB transmission entry capacity agreement. Filter by plant type, stage, and status. Download the filtered dataset to branded Excel.
Cable Sizer
NEC 2023 · IEC 60364 · BS 7671 · LV & MV
Size LV and MV power cables to NEC, IEC 60364-5-52, or BS 7671:2018 standards. Handles temperature correction, grouping derating, voltage drop, OCPD, PE/EGC sizing, and sheath bonding for MV cables.
Cable Sheath Voltage
IEC 60287 · ENA C55 Bonding
Calculate induced sheath voltages and circulating currents for MV/HV single-core cables. Determine bonding method (single-point, solid, or cross-bonded) and select ENA C55 link box types with SVL requirements.
Cable Pulling Calculator
ICEA P-45-482 · BS 8010
Calculate cable pulling tension and sidewall bearing pressure for cables installed in ducts and conduits. Define multi-section routes with straight runs, bends, and inclined sections.
Short Circuit Current Calculator
Fault Level · IEC 60909 Method
Calculate the maximum prospective short circuit current at any point in a radial network. Based on source impedance, transformer impedance, and cable impedance contributions.
BESS Design Tool
Battery Energy Storage · Sizing · Grid Integration
Design and size battery energy storage systems for utility, commercial, and industrial applications. Covers capacity sizing, C-rate selection, inverter matching, and grid code compliance checks.
Solar Design Tool
PV Array · Inverter Sizing · Yield Estimation
Design grid-connected and off-grid photovoltaic systems. Size PV arrays, string inverters, and combiner boxes while estimating annual energy yield and system performance ratio.
Protection Design Tool
Relay Coordination · Grading · Settings
Coordinate overcurrent and earth fault protection for LV and MV networks. Calculate relay settings, grading margins, and discrimination times to ensure selective fault clearance.
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We build tools our clients actually need.
If there's a calculation or tool that would save your team time, let us know. We're continuously expanding this suite based on real engineering workflows.
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