The TKR series current transformers are inductive, single-conductor current transformers operating on the transformer principle. They are designed to adapt the primary measurement value to the input nominal values of the connected measuring devices. Due to the applied measurement principle, these current transformers are suitable for exclusive use in alternating current networks. The TK series is only suitable for installation on insulated primary conductors.

These current transformers are designed for low-voltage systems (DIN EN 60044/1, DIN 42600, DIN VDE 0414/1) and are suitable for retrofitting without interrupting the conductor circuit. The housing can be opened via a plastic joint. They operate at frequencies of 50 to 60 Hz and support secondary currents of 5 A. The operating voltage is up to 720 V, and the accuracy class is 1 in accordance with IEC 1036. The temperature range is between -5 and +50 °C.

Installation is possible on cable conduits, and the housing is made of unbreakable gray polyamide, which is flame-retardant. The insulation test is conducted at 3 kV AC, 50 Hz, for 1 minute. The fixed connection cable has a length of 0.50 m and a cross-section of 1.5 mm².

Technical data for TKR 32: Primary current up to 200 A, secondary current 5 A, internal dimensions (H x W) Ø 32.5 mm, external dimensions (H x W) 96.4 x 59.2 mm, fixed connection 0.50 m, Ø 1.5 mm², brown S1 - blue S2, depth (D) 89.2 mm, accuracy class 3, burden 3 VA.