ABB Residual Current Device (RCD) DDA 200 series Ay type, selective – Excellent Time-Delayed Earth Fault Protection for S 200 MCBs

Description

ABB Residual Current Device (RCD) DDA 200 series Ay type, selective – Excellent Time-Delayed Earth Fault Protection for S 200 MCBs

The ABB RCD DDA 200 Series A Type, Selective Residual Current Block is engineered for uninterrupted service continuity in multi-level electrical distribution systems.

This protection block attaches directly to S 200 Miniature Circuit Breakers, offering superior earth fault protection while minimizing downtime.

The selective (S) feature incorporates an intentional tripping delay, guaranteeing that only the nearest fault-clearing device operates.

This is a vital mechanism for achieving selectivity in large installations and prevents system-wide outages from localized faults.

Key Features for Industrial Reliability:

• Dual Fault Protection (Type A): Guards against both standard AC and direct pulsating DC earth fault currents.
• High Surge Immunity: Withstands surge currents up to 5000A (wave 8/20), making it highly robust against transient over voltages.
• Configuration: Available in 2-pole (DDA 202) and 4-pole (DDA 204) configurations, with rated currents up to 63A.

Compliant with IEC/EN 61009-1 Ann. G standards, the ABB DDA 200 Selective Block is the ultimate choice for reliable, time-delayed protection in commercial and industrial settings.