Current transformer 30/5 A
Ratio 30:5 · primary current 30 A, secondary current 5 A
2 CELSA current transformers with a ratio of 30/5 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 30/5 A mean?
With 30 A flowing in the primary conductor, the transformer delivers 5 A to the meter or measuring device – a ratio of 6:1. 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 30/5 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 →