The ABB RD- is an electronic residual current relay designed to provide residual current protection and monitoring functions in industrial installations. It can be used in conjunction with all MCBs of the S series and Tmax range molded case devices up to T. Key features include:

• Rated Voltage (Ur): V AC/DC, suitable for systems operating within this voltage range.

• Rated Operational Voltage: to V AC/DC, accommodating a range of operational voltages.

• Type of Residual Current: Type A, capable of detecting both AC and pulsating DC residual currents.

• Adjustable Tripping Threshold (IΔn): Settings ranging from mA to A, allowing customization based on specific protection requirements.

• Adjustable Tripping Time (Δt): Configurable from instantaneous (s) up to seconds, enabling coordination with other protective devices.

• Mounting Type: DIN-Rail, facilitating easy installation in standard electrical enclosures.

• Number of Contacts: , with changeover contact (CO) for integration into control circuits.

• Power Loss: .W, ensuring energy-efficient operation.

• Standards Compliance: Conforms to IEC EN - Annex M, meeting international standards for residual current devices.

ABB - RD3-48 - Residual Current Monitor, 48V AC/DC, DIN-Rail Mounted