Plug-on current transformer 2.5/5 A
Plug-on (window type) current transformer for busbar and cable · ratio 2.5:5
One CELSA plug-on current transformer with a ratio of 2.5/5 A: Plug-on / winding current transformers (WALO). Accuracy class 1, rated burden 1.5 VA. From €97.91 incl. VAT, with datasheet, direct from the manufacturer.
Frequently asked questions
What is a plug-on current transformer?
A plug-on CT is placed on the busbar or cable; the conductor runs through its window and forms the primary winding. It is the standard design for new installations and distribution boards. For retrofits without disconnecting the conductor, choose a split-core CT. Plug-on CTs explained →
What does 2.5/5 A mean?
With 2.5 A in the primary conductor, the transformer delivers 5 A to the meter or measuring device – a ratio of 0.5:1. Meters and instruments are set to this CT ratio.
Which accuracy class?
For plug-on current transformers 2.5/5 A, class 1 is available here. Billing-relevant metering requires class 0.5 or better; for display and monitoring class 1 is usually sufficient. Accuracy class comparison →