📝 Description

Used product. The ABB DDA202 AC block combined with the S202L C10 circuit breaker forms a modular 2-pole residual current + circuit breaker protection device, designed to protect low-voltage electrical circuits against earth leakage currents, overloads and short circuits. The DDA202 AC block is specifically designed to be combined with circuit breakers from the S 200 / S 200 L series.

⚙️ Technical Specifications

• Brand: ABB
• Residual current block: DDA202 AC
• ABB code: 2CSB202001R1250
• Residual current type: Type AC
• Number of poles: 2P
• Rated residual current: 25 A
• Residual current sensitivity: IΔn 30 mA
• Rated voltage: 230 V AC
• Frequency: 50–60 Hz
• Circuit breaker: S202L C10
• Tripping characteristic: Curve C
• Circuit breaker rated current: 10 A
• Breaking capacity: 4.5 kA according to CEI EN 60898-1; 6 kA according to CEI EN 60947-2 for the S 200 L series
• Mounting: DIN rail
• Protection rating: IP2X/IP20
• Standards: IEC/EN 61009 for the residual current block and CEI EN 60898-1 / IEC EN 60947-2 for circuit breaker protection
  The visible residual current block also bears code 2CSB202001R1250, corresponding to the DDA202 AC-25/0.03, 25 A and 30 mA version.

⚡ Function in the Electrical System

Low-voltage electrical system – single-phase/bipolar AC circuits.
The device is used to provide combined circuit protection. The DDA202 AC detects sinusoidal alternating residual currents and trips when an earth leakage exceeds the 30 mA threshold, providing protection against indirect contact and additional protection against direct contact.
The S202L C10 circuit breaker provides protection against overloads and short circuits, with Curve C tripping characteristic.

🏭 Construction and Installation

The assembly is housed in an ABB modular enclosure for DIN rail installation and features a TEST button on the residual current block for checking the tripping circuit.
The photographed configuration consists of:

• DDA202 AC 25 A / 30 mA – 2 poles
• S202L C10 – 10 A / Curve C – 2 poles
• Mechanical linkage between the devices
  The DDA202 + S202L combination provides integrated residual current and circuit breaker protection in a single modular assembly. ABB specifically indicates DDA 200 blocks as accessories for use with circuit breakers from the S 200 L, S 200, S 200 M and S 200 P series.

🛡️ Safety and Product Condition

Used product, with evident but normal signs of use on the surface and external plastic. Technical markings and operating levers are clearly legible. Electrical operation is not declared if the device has not undergone testing.
Before reinstallation, it is recommended to verify contact continuity, circuit breaker tripping, correct operation of the TEST button and 30 mA residual current tripping using suitable test equipment.
⚠️ Warning: this is a protective device for energized electrical installations. Installation, testing and commissioning must be carried out by qualified personnel, respecting the specified voltage, rated current and wiring diagram.

📦 Package Contents

• 1 × ABB DDA202 AC residual current block
• 1 × ABB S202L C10 circuit breaker
• Assembly already coupled as shown in the photographs.

🚀 Final Description

The ABB DDA202 AC + S202L C10 assembly is a modular solution for residual current and circuit breaker protection of AC circuits, consisting of a Type AC 25 A / 30 mA residual current device and a 2P 10 A Curve C circuit breaker. It is suitable for electrical panels, low-voltage distribution and auxiliary circuits where simultaneous protection against earth leakage, overloads and short circuits is required.