Interactive Electrical Calculators

Calculators to calculate answers for ANY maths question for the topic areas listed below

These calculators are Microsoft Excel files (.xls) and available for either WINDOWS pc's and laptops (XP/Vista with 2003-or later microsoft Excel installed) or APPLE-MAC (Imac) desktops and laptops (OSx operating system and microsoft Excel for mac 2011 or later installed).

Calculators MUST be downloaded first and opened up in Microsoft Excel to allow you to input numbers and for the scripting and calculations to work. They will not work ‘online’ from Dropbox.

There is a FREE Demo Calculator for you to download, open in Excel and try out at the bottom of this page.

Interactive ELECTRICAL CALCULATORS (included with any download purchased)

· There are calculators for NINE Topic areas, containing 79 individual calculators in total

· Calculator set 1: DC circuits and Resistance - Ohms Law, resistors in series, resistors in parallel, full circuit calculations including power, currents, volts-drops. Resistivity including micro, nano and area conversions. Temperature coefficients of resistance.

· Calculator set 2: Mechanical science – Force, Mass, acceleration, velocity, pressure, Work done, Power. Levers and balance, effort and load, efficiency.

· Calculator set 3: AC circuits – R,L and C calculations in series and parallel, Inductive and capacitive reactance (XL and Xc), Impedance, true power, apparent power, reactive power, Pythagoras theorem, power factor (Cos0), voltages and currents, STAR and DELTA voltages and currents, calculating Neutral current in unbalanced STAR systems.

· Calculator set 4: Transformers – calculating step-up and step-down voltages, currents and number of turns. Calculating transformer efficiencies (3 different ways).

· Calculator set 5: Magnetism and Inductance – magnetic flux density, core area and magnetic flux. Force on a conductor and back EMF. Stored energy calculations. Self and Mutual inductance calculations.

· Calculator set 6: AC motors and generators – Synchronous speed, frequency and poles. SLIP calculations, rotor speed, rpm and rps conversions.

· Calculator set 7: DC motors and generators – Lenz Law, Terminal voltage and back EMF calculations, Armature current and Resistance calculations.

· Calculator set 8: Motors (Advanced) – Torque in AC motors, Torque in DC motors, belt speeds, conveyor dimensions, gear-feeds, friction, efficiency, rotor speeds, gearhead ratios.

· Calculator set 9: Lighting – Inverse Square Law, Illumination, Illuminance, Cosine Law, Pythagoras theorem, total Luminous Flux and number of lamps required, efficacy, Coefficient of utilization and maintenance factors.

· ALSO (extra calculator for Level 3 resources for Windows ONLY): Cable Sizing using BS7671 regs book and O.S.G. Everything from inputting the power of the load at the beginning, single or 3-phase voltage (and power factor if required), Ib, selected protective device rating In, factors, It, circuit length, mV/A/m, Vdrop values, cable size and Iz, Earthing, Ze, (r1_+r2)+ correction factor , Ze, Fault current value, ‘K’ values up too the adiabatic equation at the end. Can be used to verify ANY cable calc questions.

TO CHECK COMPATIBILITY WITH YOUR PC/MAC/Tablet etc, DOWNLOAD A FREE 'DEMO' NEUTRAL CURRENT CALCULATOR BELOW.

Select the pc version if you use windows pc/laptop OR select the mac version if you use a Apple (imac, laptop, desktop or ipad)

The demo calculator is fully functional and allows you to calculate the Neutral current in an un-balanced 3-phase STAR circuit. You should be able to input THREE current values (one for each phase) into the WHITE cells and the Neutral current answer will be displayed in coloured cell and on the circuit diagram. You should NOT be able to enter/delete/change any contents of coloured cells. If this demo calculator works on your pc (or mac) - then ALL my calculators will function correctly on your system. (I welcome any feedback via email).

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free EXAMPLE CALCULATOR DOWNLOAD

Left click on the calculator you wish to use Windows OR Mac (you will be prompted to either open it or save it - your choice). Microsoft Excel will open on your pc/mac and you can use the calculator straight away.

Or you can right-click your mouse on the calculator you want to download, and click on 'save link'. Save it to a location on your pc/mac, then open it.in Excel.

WINDOWS CALCULATOR (click)

MAC CALCULATOR (click)

Click HERE to read the 'How to use the calculators' guide and Frequently asked questions.

Click HERE to see screenshots of ALL calculators available

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ALL 79 calculators are grouped into NINE categories, covering ALL the topics listed above, and are included with ANY course download purchased.

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