Current transformer 1250/5 A

Ratio 1250:5 · primary current 1250 A, secondary current 5 A

17 CELSA current transformers with a ratio of 1250/5 A: Plug-on / winding current transformers (ALO) and Calibrated clip-on current transformers (ALO-E). Accuracy class 0.2, 0.2 S, 0.5, 0.5 S or 1, rated burden 1–20 VA. From €63.13 incl. VAT, with datasheet, direct from the manufacturer.

Frequently asked questions

What does 1250/5 A mean?

With 1250 A flowing in the primary conductor, the transformer delivers 5 A to the meter or measuring device – a ratio of 250:1. 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 1–20 VA. The VA calculator determines the value. VA calculator →

Which accuracy class?

For 1250/5 A the classes 0.2, 0.2 S, 0.5, 0.5 S and 1 are available here. Billing-relevant metering requires class 0.5 or better; for display and monitoring class 1 is usually sufficient. Accuracy class comparison →