# Electrical Engineering

Browse 14 online electrical engineering tools for processing, converting, validating, and managing related files and data.

> Canonical page: https://elysiatools.com/en/tags/electrical-engineering

## Overview

Explore 14 electrical engineering tools for working with related files and data through a browser-based interface, with no software installation required.

## Frequently asked questions

### What can I do with these Electrical Engineering tools?

You can process, convert, validate, and manage electrical engineering files and data using the tools in this category.

### Do I need to install software?

No software installation is required. You can operate the tools through the browser interface.

### How is my data handled?

Your requests are processed on Elysia Tools servers. Text inputs are not stored, and uploaded files are automatically deleted after 6 hours.

## Tools

- [RLC Admittance Calculator (Y = G + jB)](https://elysiatools.com/en/tools/admittance-calculator): Compute complex admittance Y = 1/Z = G + jB for series or parallel RLC circuits: G = R/|Z|², B = −X/|Z|². Returns conductance, susceptance, magnitude and phase angle. Supports any subset of R/L/C.
- [Cable Ampacity Calculator (IEC 60364-5-52)](https://elysiatools.com/en/tools/cable-ampacity-calculator): Estimate copper cable current-carrying capacity per the simplified IEC 60364-5-52 reference method. Combines cross-section, insulation (PVC 70°C / XLPE 90°C), installation method, and ambient temperature to derive the corrected allowable ampacity (A).
- [Capacitor Reactive Power Calculator (Q_c = 2πfCU²)](https://elysiatools.com/en/tools/capacitor-reactive-power): Compute the reactive power produced by a known capacitor: Q_c = 2π·f·C·U². Supports single-phase, three-phase star (Y) and delta (Δ) connections. Returns Q_c in var/kvar, capacitive reactance Xc, and capacitor current Ic. Complementary to the power-factor-correction tool (which sizes a capacitor for a target cosφ).
- [RLC Impedance & Phase Angle Calculator](https://elysiatools.com/en/tools/impedance-calculator): Compute complex impedance, magnitude |Z| and phase angle φ for series or parallel RLC circuits: X_L=2πfL, X_C=1/(2πfC), |Z|=√(R²+X²), φ=atan2(X,R). Supports any subset of R/L/C and an optional linear frequency sweep.
- [Motor Efficiency Calculator (η = P_out / P_in)](https://elysiatools.com/en/tools/motor-efficiency-calculator): Compute motor efficiency η = P_out / P_in. Supports electrical input (single-phase U·I·cosφ or three-phase √3·U·I·cosφ) or direct P_in; output power can be derived from a loss breakdown (copper+iron+rotor copper+mechanical+stray) or supplied directly.
- [Three-Phase Induction Motor Slip Calculator](https://elysiatools.com/en/tools/motor-slip-calculator): Compute three-phase induction motor slip: synchronous speed n_s = 60·f/p and slip s = (n_s − n)/n_s. Supports slip-from-speed and speed-from-slip modes; automatically flags generator mode (s < 0).
- [Induction Motor Torque-Speed Characteristic (Kloss)](https://elysiatools.com/en/tools/motor-torque-speed): Build the torque-speed curve of a three-phase induction motor using the Kloss equation T/T_max = 2/(s/s_max + s_max/s). Returns rated torque, breakdown (max) torque, starting torque, breakdown slip, and a sampled T-n curve with configurable point count.
- [Power Factor Correction Calculator](https://elysiatools.com/en/tools/power-factor-correction): Size the shunt capacitor needed to raise the power factor: C = P·(tanφ₁ − tanφ₂)/(2π·f·U²). Returns compensated reactive power Qc, capacitive reactance Xc, capacitor current Ic, and the required capacitance in F/μF.
- [Inverse-Time Overcurrent Relay Setting (IEC 60255-151)](https://elysiatools.com/en/tools/relay-setting-calculator): Compute the operating time of an inverse-time overcurrent relay per IEC 60255-151: t = TMS·(k/((I/I_s)^α − 1)). Supports Standard Inverse (SI), Very Inverse (VI), Extremely Inverse (EI) and Long-Time Inverse (LTI) curves, and samples a T-I characteristic.
- [Three-Phase Short-Circuit Current Calculator (IEC 60909)](https://elysiatools.com/en/tools/short-circuit-current-calculator): Estimate the three-phase symmetric short-circuit current using the IEC 60909 far-from-generator method: I"_k = c·U_n/(√3·|Z|) and i_p = κ·√2·I"_k with κ = 1.02 + 0.98·e^(−3R/X). Source impedance is the series sum of transformer and line R/X.
- [Three-Phase Power Calculator](https://elysiatools.com/en/tools/three-phase-power-calculator): Calculate active, reactive, and apparent power for a balanced three-phase system: S=√3·U·I, P=√3·U·I·cosφ, Q=√3·U·I·sinφ. Also returns the power-factor angle φ and verifies the power triangle.
- [Transformer Impedance Transfer Calculator](https://elysiatools.com/en/tools/transformer-impedance-transfer): Reflect an impedance through an ideal transformer: Z' = a²·Z, where a = N₁/N₂. Supports secondary→primary and primary→secondary directions; a can be given directly or derived from N₁/N₂. Also returns admittance Y and reflected admittance.
- [Transformer Turns Ratio Calculator](https://elysiatools.com/en/tools/transformer-turns-ratio): Ideal transformer ratio: a = N₁/N₂ = V₁/V₂ = I₂/I₁. Given turns, voltage, or current on either side, compute a and the corresponding voltage/current on the other side; verifies V₁·I₁ = V₂·I₂.
- [Voltage Regulation Calculator (ΔU%)](https://elysiatools.com/en/tools/voltage-regulation-calculator): Compute transformer or feeder voltage regulation from equivalent-circuit parameters: ΔU% ≈ (I·R·cosφ ± I·X·sinφ)/U·100. Returns both the approximate (linear) and exact (phasor) values; supports lagging, unity and leading power factor.

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