Plug-on current transformer 1/1 A
Plug-on (window type) current transformer for busbar and cable · ratio 1:1
One CELSA plug-on current transformer with a ratio of 1/1 A: Plug-on / winding current transformers (WALO). Accuracy class 0.5 or 1, rated burden 1.5–5 VA. From €103.48 incl. VAT, with datasheet, direct from the manufacturer.
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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 1/1 A mean?
With 1 A in the primary conductor, the transformer delivers 1 A to the meter or measuring device – a ratio of 1:1. Meters and instruments are set to this CT ratio. The 1 A secondary keeps cable losses low on long measuring lines.
Which accuracy class?
For plug-on current transformers 1/1 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 →