2062150 Реле диференційне (ПЗВ) EFI-4 100/0,03 тип A (10kA)

ETI EFI-4 is a residual current device designed to monitor leakage currents and disconnect an electrical circuit when hazardous operating conditions occur. It is used in distribution boards of residential, commercial, and industrial installations where protection of people and equipment is required. With a 3+N configuration, the device is intended for three-phase systems with a neutral conductor, making it suitable for common low-voltage distribution circuits. The unit is rated for a nominal current of 100 A and a residual operating current of 0.03 A. This level of sensitivity allows it to respond to small leakage currents and helps provide additional protection in circuits where safe disconnection is important. Type A means the device responds not only to sinusoidal alternating residual current, but also to pulsating direct residual current, which is relevant for circuits with electronic loads. The rated operational voltage is 400 V AC, so the device is intended for three-phase alternating-current networks. For short-circuit conditions, the device has an Inc rating of 10 kA, which should be considered during system design and coordination with upstream protection devices. Installation is performed on a TH 35 DIN rail, allowing integration into standard modular switchboards. The housing depth of 68 mm is useful when planning internal panel space and arranging equipment within the enclosure. The connection range of 1–35 mm² supports a wide selection of conductors, which simplifies wiring in power circuits. The IP20 protection degree indicates indoor installation inside an electrical enclosure, where direct contact with live parts is prevented by the switchboard structure. Compliance with IEC/EN 61008 confirms the intended use of the device as a residual current protective device. Overall, EFI-4 is a protective switching element for circuits where controlled leakage-current detection, three-phase operation, and standardized panel mounting are required.