2CSB803101R4000 ABB DDA803 A-100/0.5 RCD Block 100 A 3P Type A 500 mA

Why Choose the ABB DDA803 A-100/0.5 RCD Block?

The ABB DDA803 A-100/0.5 is a high-performance three-pole Type A residual current device (RCD) block designed for combination with compatible ABB S800 miniature circuit-breakers. As part of the ABB DDA 800 series, it provides residual current protection for three-pole electrical distribution circuits in demanding commercial and industrial installations.

Its Type A residual current characteristic enables detection of sinusoidal alternating residual currents and pulsating direct residual currents. This makes the DDA803 A-100/0.5 suitable for modern electrical installations containing electronic equipment and other loads capable of producing pulsating DC earth leakage currents.

With a rated current of 100 A, a rated residual operating current of 500 mA and a three-pole configuration, the DDA803 A-100/0.5 provides robust earth fault protection for higher-current distribution circuits. When assembled with a compatible ABB S800 MCB, it adds residual current protection to the overload and short-circuit protection provided by the associated circuit-breaker.

Key Advantages

• Dependable Type A residual current protection for electrical distribution systems.
• 100 A rated current for higher-current commercial and industrial circuits.
• 500 mA rated residual operating current for earth fault protection.
• Three-pole configuration for compatible three-pole distribution applications.
• Detects sinusoidal AC and pulsating DC residual currents.
• Designed for combination with compatible ABB S800 miniature circuit-breakers.
• Combined installation provides residual current protection alongside MCB overload and short-circuit protection.

Key Features

• ABB DDA 800 residual current device block series.
• 100 A rated current.
• 500 mA residual current sensitivity.
• Three-pole configuration.
• Type A residual current characteristic.
• Detection of sinusoidal alternating and pulsating direct residual currents.
• Designed for use with compatible ABB S800 MCBs.
• Suitable for higher-current three-pole electrical distribution circuits.
• Suitable for commercial and industrial electrical installations.
• Designed for coordinated residual current and overcurrent protection when assembled with a compatible MCB.

Reliable Residual Current Protection for Three-Pole Distribution

Residual current protection monitors the balance of current flowing through the live conductors of an electrical circuit. When an earth leakage fault creates an imbalance above the specified operating threshold, the protective assembly can disconnect the affected circuit. The ABB DDA803 A-100/0.5 provides Type A detection for both sinusoidal alternating residual currents and pulsating direct residual currents.

The DDA 800 series is designed for combination with compatible ABB S800 miniature circuit-breakers. When correctly assembled, the DDA803 A-100/0.5 adds 500 mA residual current protection to the overload and short-circuit protection provided by the associated MCB, creating an integrated protection solution for higher-current three-pole electrical distribution circuits.

Typical Applications

• Commercial three-pole electrical distribution systems.
• Industrial electrical installations.
• Main and sub-distribution boards using compatible ABB S800 miniature circuit-breakers.
• Higher-current circuits requiring 100 A rated residual current protection.
• Circuits requiring detection of AC and pulsating DC earth fault currents.
• Electrical distribution systems requiring combined residual current and overcurrent protection.