Current transformer 12.5/5 A
Ratio 12.5:5 · primary current 12.5 A, secondary current 5 A
2 CELSA current transformers with a ratio of 12.5/5 A: Plug-on / winding current transformers (WALO) and Calibrated clip-on current transformers (WALO-E). Accuracy class 0.5 or 1, rated burden 1.5–5 VA. From €97.91 incl. VAT, with datasheet, direct from the manufacturer.
Frequently asked questions
What does 12.5/5 A mean?
With 12.5 A flowing in the primary conductor, the transformer delivers 5 A to the meter or measuring device – a ratio of 2.5:1. 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 1.5–5 VA. The VA calculator determines the value. VA calculator →
Which accuracy class?
For 12.5/5 A the classes 0.5 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 →