ABB DDA200 Residual Current Blocks

Choosing the Residual Current Function

Select the protection type for the possible earth-fault waveform and the load. ABB distinguishes Type AC for sinusoidal alternating residual currents and Type A for alternating and pulsating direct residual currents. Its DDA200 Type B documentation also addresses smooth DC residual currents. These functions must be checked on the exact product, not inferred from the broad DDA200 family name.

The retained list includes AC, A, A AP-R, A S, A AE, B AP-R and F references. AP-R denotes high-immunity versions; selective S and AE remote-release versions have different operating purposes. They are not interchangeable descriptions of sensitivity. The F references require the relevant Type F product documentation; the characteristics of an AC or A block must not be applied to them.

Poles, Current and Sensitivity

ABB’s range overview includes 2-, 3- and 4-pole devices and rated currents of 25, 40 and 63 A. Rated current describes the block’s current rating; rated residual operating current (IΔn) describes its tripping sensitivity. Select both for the circuit and protection purpose. Available sensitivities depend on type and version: one universal sensitivity range must not be applied to every entry.

The existing table retains historical references, including some 2 A AC entries listed in ABB’s installation catalogue. The current range overview is not a reason to remove them. Confirm the complete order code, applicable revision, test-circuit voltage and timing before specifying a particular device.

MCB Combination and Standards

DDA200 is mounted on the left of the associated S200 MCB. ABB describes a mechanical key that prevents assembly with an MCB rated above the RCD block. Confirm the permitted MCB version, pole arrangement and physical assembly using the exact documentation.

ABB’s installation catalogue gives IEC/EN 61009-1 Annex G and IEC/EN 61009-2-1 for its listed DDA200 variants, with IEC 62423 additionally identified for Type B. Breaking capacity depends on the associated MCB and applicable assembly data. An advertised maximum for the range is not the rating of every block/MCB pair. Check regional approvals separately; do not assume IEC data establishes a UL application.

Selection and Quotation Checklist

Confirm supply voltage and frequency, poles and neutral arrangement, circuit current, load and possible residual-current waveforms, required sensitivity and selectivity, prospective short-circuit current, exact S200 MCB, mounting space and any remote-release function. Installation and test-button operation must follow the applicable instructions.

Use the model/code search below, then request a quote with the full DDA model and ABB order code, associated MCB, quantity, destination country and required electrical characteristics. For an existing assembly, include clear nameplate and wiring/assembly photos. Unconfirmed historical parameters, certifications, product status and replacement relationships require individual verification.

Browse Residual Current Protection and MCBs. S200 is the associated MCB family; DS201 is a separate RCBO family rather than a DDA200 add-on block.

ABB Documentation

See the ABB DDA200 range overview and the ABB Electrical Installation Solutions catalogue, residual current devices (PDF), including the DDA200 technical and variant tables. Check the applicable version for the complete product code.