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Power

What is it actually drawing?

Volts times amps is not kilowatts. Put in what your meter says and this shows the difference, and why it's there.

What's on the end of the clamp

Power factor is optional — many clamp meters show it (often as PF, or λ), and some give kW directly. Leave it empty and you still get the ceiling.

Where the meter goes
SUPPLY230 VUNIT1 φLNECLAMPVClamp the LINE on its own. Volts line-to-neutral.L and N through the jaw together reads ≈ 0 A.
Solve the triangle

Know any two? The rest fill in.

Fixed-speed maths; illustration only on an inverter. Running figures — not maximums, nothing to size protection from.

Earth leakage — with a leakage clamp

Clamp L and N together (all lives and N on three phase) — whatever shows is going to earth.

A device may operate anywhere above half its rating. A ramp-test figure replaces the window with this device's own number.

Live to earth — insulation test

Megger each live to earth — the MΩ becomes the current that path can pass.

Isolate and disconnect the drive/PCB before a 500 V test. Your manual's minimum wins.

This works out what a running unit is drawing. It is not electrical design: it doesn't size a cable, pick a protective device or say a supply is adequate. Those are an electrician's call, on the manufacturer's figures.

Pressure test checkerThermistor converter