Celsa Current Transformers Cable current transformer 623630 - Celsa 70006-1129, The Cable Current Transformer from Celsa features a primary current of 250 A and a secondary current of 1 A, with a line feed-through diameter of 18 mm. Designed for precise current measurement, the TQ 18-B 250/1A 0.2VA Kl. 0.5 offers high accuracy for various electrical applications. Often utilised in industrial environments, this device is ideal for monitoring and analysing electrical circuits efficiently. Celsa 70006-1129 TQ 18-B 250/1A Cable Transformer, Compact Design