ABB Residual Current Device (RCD) DDA 800 Ay type selective for MCBs S800 – Excellent Ensures Selectivity with Downstream Instantaneous Devices

Description

ABB Residual Current Device (RCD) DDA 800 Ay type selective for MCBs S800 – Excellent Ensures Selectivity with Downstream Instantaneous Devices

The ABB RCD DDA 800 A Selective Earth Fault Device is a robust safety solution engineered to expand the functionality of the ABB S800 series Miniature Circuit Breakers (MCBs).

This high-capacity modular RCD-block is rated up to 100A and is compliant with the demanding IEC/EN 60947-2 Ann. B standard.

Key Features for Enhanced Selectivity:

• Selective Function: Incorporates an intentional tripping delay, ensuring that only the most immediate downstream device trips in the event of an earth fault. This crucial feature prevents unnecessary shutdowns, thereby maximizing service continuity.
• A-Type Protection: Provides critical protection by detecting and interrupting both sinusoidal alternating and direct pulsating earth fault currents.
• Versatile Configurations: Available in 2-pole (DDA 802), 3-pole (DDA 803), and 4-pole (DDA 804) versions.
• High Sensitivity Options: Offers various residual current sensitivities (IΔn) including 300mA, 500mA, and 1000mA.

This modular protection unit is the dependable choice for complex commercial and industrial electrical installations where circuit protection must be coordinated for optimal reliability and uninterrupted operation.