Engineering tools
Calculators for the line, the power and the light.
Breaker rating and cable size for a line, inverter and battery for backup power, a power supply for LED strip, colour temperature. They work right in the browser; a line or backup-power result can be sent to a manager as a request in one click.
Engineering calculation
Which breaker and cable the line needs
Enter the power, supply and line length to get the design current, breaker rating, copper cable cross-section and voltage drop.
Indicative: copper in a wall or conduit, cos φ 0.95, C characteristic, voltage drop up to 5% for power circuits and up to 3% for lighting. The final choice follows the project and the wiring regulations (PUE), allowing for the installation method and temperature.
How to size a breaker and cableAbove 125 A this is a service entrance or a main feeder. Send us the parameters and we will specify equipment for the project.
Calculation
How much inverter and battery you need
Switch on what has to keep running during an outage and say for how many hours. You get the inverter power and the battery capacity.
We size the inverter with a 25 % margin over the total load and check it against the starting currents of the fridge and pumps. Capacity assumes 90 % inverter efficiency and a working depth of discharge of about 90 % for LiFePO4 and 50 % for gel and AGM batteries.
How to size an inverter and batterySelect at least one load.
Calculation
Power supply for LED strip
Length × watts per metre × 1.2 — and the standard power-supply rating.
The 20 % margin is mandatory: at its limit a power supply runs hot and fails sooner. The supply voltage must match the strip — 12, 24 or 48 V.
How to choose a power supplyAbove 5 m of 12 V strip, feed from both ends or split into sections
Matching power supplies
All products in this sectionColour temperature
One room. Five shades of white.
Colour temperature is the first thing agreed in a lighting specification. Move the slider: the same living room from 2700 to 6500 K.
Warm white
Like an incandescent lamp. Cosy light that invites you to slow down.
Where it worksBedroom, living room in the evening, night lights
Soft warm
Warm but clean. Wood and textiles stay natural, the evening stays calm.
Where it worksLiving room, dining table, hallway, hotels
Neutral
White without yellow or blue. Food colours, text and faces read well.
Where it worksKitchen, bathroom mirror, office, sales floor
Daylight
Like light by a window at midday. Energising and holds attention, but feels harsh in the evening.
Where it worksWorkshop, studio, study, service garage
Cool
A bluish tint and maximum contrast. Good for fine work and inspection, bad before sleep.
Where it worksWarehouse, garage, quality-control area
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