It is built for residual current monitoring in grounded and ungrounded networks, including systems with smooth DC fault currents — the Type B classification means it detects AC, pulsed DC, and smooth DC residual currents down to 10 mA minimum, which is critical for variable-speed drives, UPS systems, and EV charging infrastructure where standard Type A transformers would miss a pure DC fault.
Rated 160 A continuous and 690 V AC at 50/60 Hz, with an 8 kV surge voltage rating — that covers most low-voltage distribution panels up to 690 V line-to-line. The 60 mm internal diameter passes three or four main conductors plus the PEN conductor through the window, typical for a 160 A feeder. The minimum residual current sensitivity of 10 mA allows use in applications requiring high-sensitivity earth leakage detection, such as medical IT systems or data centers. The metal shielding (noted in the description) reduces external magnetic field influence, improving measurement accuracy in crowded panels. The plug-in terminal accepts up to six conductors of 0.75 mm² each, making secondary wiring straightforward. The IP20 protection class is standard for indoor panel mounting — no special sealing needed.
Deployment context
The Type B rating makes it suitable for circuits with variable-speed drives, UPS systems, or any load that can generate smooth DC fault currents — standard Type A transformers would not detect a pure DC residual, so this part is the correct choice for modern electronic loads. The maximum wire length of 10 m between the transformer and the evaluation unit (RCD or relay) should be respected to avoid measurement errors.