Current transformer 25/1 A
Ratio 25:1 · primary current 25 A, secondary current 1 A
2 CELSA current transformers with a ratio of 25/1 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 €66.24 incl. VAT, with datasheet – order online.
Frequently asked questions
What does 25/1 A mean?
With 25 A flowing in the primary conductor, the transformer delivers 1 A to the meter or measuring device – a ratio of 25:1. Meters and instruments are set to this CT ratio. The 1 A secondary keeps cable losses low on long measuring lines.
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 25/1 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 →