Plug-on current transformer 75/1 A
Plug-on (window type) current transformer for busbar and cable · ratio 75:1
4 CELSA plug-on current transformers with a ratio of 75/1 A: Plug-on / winding current transformers (ALO). Accuracy class 0.5 or 1, rated burden 1–2.5 VA, window for round conductors Ø 20–34 mm. From €53.06 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 75/1 A mean?
With 75 A in the primary conductor, the transformer delivers 1 A to the meter or measuring device – a ratio of 75:1. Meters and instruments are set to this CT ratio. The 1 A secondary keeps cable losses low on long measuring lines.
Will it fit my cable?
The window decides: the types listed here take round conductors of Ø 20–34 mm, depending on the type. The datasheet of each type gives the exact window and busbar dimensions. CT finder →
Which accuracy class?
For plug-on current transformers 75/1 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 →