Protection current transformer 100/1 A
Protection current transformer for protection relays · ratio 100:1
One CELSA protection current transformer with a ratio of 100/1 A: Protective current transformer (IB-50). Accuracy class 5P5–10P5, rated burden 2.5 VA, window for round conductors Ø 23 mm. From €56.61 incl. VAT, with datasheet, direct from the manufacturer.
Frequently asked questions
What does 5P10 mean?
Protection CTs transmit even high overcurrents faithfully so that protection relays trip reliably. In 5P10, "5P" means a composite error of at most 5 %, "10" is the accuracy limit factor: the limit holds up to 10 times the rated current. Available here for 100/1 A: 5P5 and 10P5. Protection CTs explained →
What does 100/1 A mean?
With 100 A in the primary conductor, the transformer delivers 1 A to the meter or measuring device – a ratio of 100:1. 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 23 mm, depending on the type. The datasheet of each type gives the exact window and busbar dimensions. CT finder →