Current transformer 4000/5 A
Ratio 4000:5 · primary current 4000 A, secondary current 5 A
10 CELSA current transformers with a ratio of 4000/5 A: Plug-on / winding current transformers (ALO), Calibrated clip-on current transformers (ALO-E) and Protective current transformer (IRM). Accuracy class 0.2, 0.2 S, 0.5, 0.5 S, 1 or 5P5–10P10, rated burden 2.5–45 VA. From €141.71 incl. VAT, with datasheet, direct from the manufacturer.
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Frequently asked questions
What does 4000/5 A mean?
With 4000 A flowing in the primary conductor, the transformer delivers 5 A to the meter or measuring device – a ratio of 800:1. Meters and instruments are set to this CT ratio.
How much burden (VA) do I need?
The rated burden must cover the consumption of the connected devices plus the losses of the measuring line, without being much higher. The types listed here offer 2.5–45 VA. The VA calculator determines the value. VA calculator →
Which accuracy class?
For 4000/5 A the classes 0.2, 0.2 S, 0.5, 0.5 S, 1 and 5P5–10P10 are available here. Billing-relevant metering requires class 0.5 or better; for display and monitoring class 1 is usually sufficient. Accuracy class comparison →