ETI EFI-2 residual current device 100/0.03 A type AC 10 kA (2062531)

The ETI EFI-2 residual current device is intended for protection of electrical circuits against leakage currents and indirect electric shock. It is used in distribution boards of residential, commercial, and small industrial electrical installations where fast disconnection of a faulty circuit is required. As a residual current relay in accordance with IEC/EN 61008, it provides differential protection for single-phase lines with a neutral conductor. The device is rated for a current of 100 A and has a residual operating current of 0.03 A, which means it is designed to detect small leakage currents and disconnect the circuit before they create a hazardous condition. Type AC indicates response to alternating residual current. The 1+N pole configuration makes the unit suitable for single-phase networks, while the rated AC voltage of 230 V matches standard low-voltage applications. The short-circuit rated current Inc is 10 kA, which should be taken into account when selecting protective equipment for circuits with a corresponding prospective fault level. Installation is performed on a TH 35 DIN rail, so the device can be mounted in standard modular distribution boards alongside other switchgear. The housing depth is 69 mm, which is important for planning the available space inside the enclosure. The IP20 protection rating indicates indoor installation within a panel, where direct contact with live parts is limited by the enclosure arrangement rather than by additional environmental sealing. Connection is possible with conductors ranging from 1 to 35 mm², allowing the device to be integrated into different distribution line configurations. Thanks to the combination of 100 A nominal current, 30 mA sensitivity, 1+N poles, DIN rail mounting, and 10 kA short-circuit rating, this residual current device is suitable as a protective element for feed and group circuits where leakage-current disconnection is required.